KR20230115477A - A detection probe for detecting the state of a fluid in a high-temperature enviroment, and a detection system comprising the same - Google Patents

Abstract

Disclosed is a detection probe. The detection probe that detects the state of a fluid in a high temperature environment according to an embodiment may comprise: a probe housing connected to a structure; a heat flux measurement module including a foil disposed in a first part in front of the probe housing and a wire connecting the foil and a voltage meter along the inside of the probe housing; and a pressure measurement module including a first flow path that is formed in a second part in front of the probe housing, is formed along a first inlet through which the fluid flows and the inside of the probe housing, and communicates with the first inlet and a pressure gauge. In addition, various embodiments may be possible. Thus, the present invention can provide the detection probe capable of simultaneous measurement and the detection system including the same.

Description

A detection probe for detecting a state of a fluid in a high-temperature environment and a detection system including the same

The following embodiments relate to a detection probe for detecting a state of a fluid in a high-temperature environment and a detection system including the detection probe.

During the flight of space vehicles and ultra-high speed vehicles, a high-temperature and high-pressure fluid environment is generated. High enthalpy flow is known to affect the survivability of aircraft. The importance of research in high enthalpy flow environments is increasing to improve the survivability of aircraft.

As equipment used in a high enthalpy flow environment, there is an arc jet equipment. The arc jet equipment generates an arc discharge inside the torch to spray high-temperature, high-enthalpy flow through a supersonic nozzle. Since it is used in a temperature environment of 3,000 degrees or higher, a pressure/heat measurement probe device specially designed for high temperatures must be used.

As a type of device used in a high-temperature environment, a probe device for measuring pressure that measures pressure by being connected to an external pressure measuring device through a passage located inside the probe, and a copper wire connected to a thin foil existing on the surface are connected to an external voltage measuring device. There is a probe device for measuring heat flux that measures heat flux through a voltage generated by being connected to.

There are problems in that errors may occur and operation costs are high when pressure and heat, which are basically required to be measured in order to analyze the environment of a high-temperature flow, are measured with different equipment.

Accordingly, there is a need for an integrated device for measuring the pressure and temperature of a fluid in a high-temperature environment, which can simultaneously perform pressure/heat measurement functions.

For example, Korean Patent Registration No. 10-1551943-0000 discloses a "probe for measuring static pressure".

The above background art is possessed or acquired by the inventor in the process of deriving the disclosure of the present application, and cannot necessarily be said to be known art disclosed to the general public prior to the present application.

It is to provide a detection probe capable of simultaneous measurement and a detection system including the detection probe.

An object according to an embodiment is to provide a detection probe capable of miniaturization and simplification of equipment by integrating a plurality of equipment for determining the state of fluid.

An object of an embodiment is to provide a device capable of reducing a pressure measurement error by correcting a pressure change caused by cooling water of a pressure measurement module using heat flux data measured by a voltage measuring device.

A detection probe for detecting a state of a fluid in a high-temperature environment according to an embodiment includes a probe housing connected to a structure, a foil disposed in a front portion of the probe housing, and the foil and A heat flux measuring module including a wire connecting a voltage meter, a first inlet formed in a second part in front of the probe housing and into which the fluid flows, and formed along the inside of the probe housing, the first inlet and It may include a pressure measuring module including a first flow path communicating with the pressure measuring device.

In an embodiment, the detection probe may further include a cooling water passage formed inside the probe housing and through which cooling water for cooling the electric wire and the first passage flows.

In one embodiment, in the detection probe, the cooling water path may be formed in a coil shape surrounding at least a portion of the electric wire and the first flow path.

In one embodiment, in the detection probe, the first flow path includes a first flow path portion connected to the first inlet and a second flow path portion connecting the first flow path portion and the pressure measuring device, wherein the first flow path portion is connected to the first inlet port. The passage portion may include a barrier protruding inward with respect to the cross section to accelerate the flow speed of the fluid introduced through the inlet.

In one embodiment, the pressure measuring module of the detection probe is formed along the second inlet formed in the front third part of the probe housing, through which the fluid flows, and formed along the inside of the probe housing and the second inlet And it may further include a second flow path communicating with the pressure measuring device.

In one embodiment, the second inlet of the detection probe may be formed on the opposite side of the first inlet with respect to the center of the probe housing in a state of looking at the front of the probe housing.

In one embodiment, the first inlet and the second inlet of the detection probe may be disposed symmetrically with respect to the front center of the probe housing.

In one embodiment, the foil of the detection probe is disposed between the first inlet and the second inlet, A front center of the probe housing may be positioned on the foil.

In one embodiment, the heat flux measuring module and the pressure measuring module in the detection probe may simultaneously measure the temperature and pressure of the fluid.

A detection system for detecting a state of a fluid in a high-temperature environment according to an embodiment includes a detection probe, connected to the detection probe, a voltage measuring device for measuring a heat flux of the fluid, and connected to the detection probe, It may include a pressure measuring device for measuring the pressure of the fluid, and the detection probe may include a foil disposed in a first portion in front of the probe housing, and connecting the foil and the voltage measuring device along the inside of the probe housing. A heat flux measurement module including an electric wire, a first inlet formed in a second part in front of the probe housing and into which the fluid flows, and a first inlet formed along the inside of the probe housing and communicating the first inlet and the pressure measuring device. a pressure measurement module including a first flow path for measuring the pressure; and a cooling water path formed inside the probe housing and through which cooling water for cooling the electric wire and the first flow path flows, wherein the pressure measuring device measures the voltage The pressure of the fluid may be detected by correcting a pressure change of the fluid caused by the cooling water through the heat flux of the fluid measured by the measuring device.

A detection probe for detecting a state of a fluid in a high-temperature environment and a detection system including the detection probe according to an embodiment can simultaneously measure the pressure and heat flux of a flow without additional pressure and heat flux measuring devices.

A detection probe for detecting a state of a fluid in a high-temperature environment and a detection system including the detection probe according to an embodiment may reduce a pressure measurement error by correcting a pressure change through temperature confirmation.

1 is a perspective view of a detection system according to an embodiment.
2 is a perspective view of a detection probe according to an embodiment.
3 is a diagram schematically illustrating an internal flow path of a detection probe according to an exemplary embodiment.
FIG. 4 is an enlarged view of area A of FIG. 2 .
5 is an enlarged view of a front of a detection probe according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Terms used in the examples are used for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the embodiment, the detailed description will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

Components included in one embodiment and components having common functions will be described using the same names in other embodiments. Unless stated to the contrary, descriptions described in one embodiment may be applied to other embodiments, and detailed descriptions will be omitted to the extent of overlap.

1 is a perspective view of a detection system according to an embodiment. 2 is a perspective view of a detection probe according to an embodiment. 3 is a diagram schematically illustrating an internal flow path of a detection probe according to an exemplary embodiment. FIG. 4 is an enlarged view of area A of FIG. 2 . 5 is an enlarged view of a front of a detection probe according to an exemplary embodiment.

Referring to FIGS. 1 to 5 , the detection system 1 according to an embodiment may be used to detect a state of a fluid in a high-temperature environment. For example, the detection system 1 may be connected to the structure 10, for example, a structure such as a pipe, and detect a state of fluid flowing through the structure 10. In one embodiment, the detection system 1 may detect a plurality of pieces of information about the state of the fluid, such as temperature, heat flux and pressure of the fluid. In one embodiment, the detection system 1 may reduce a measurement error for each fluid information by integrating a plurality of detected pieces of information. The detection system 1 according to an embodiment may include a detection probe 20 , a voltage measurer 30 connected to the detection probe 20 , and a pressure measurer 40 connected to the detection probe 20 .

In one embodiment, detection probe 20 may be directly connected to structure 10 . In one embodiment, the detection probe 20 may be used to measure various information about the state of the fluid, such as the temperature, heat flux and pressure of the fluid. For example, while the detection probe 20 is connected to the structure 10, information according to the temperature of the fluid may be transmitted to the heat flux measurement module 210 to be described later, and the fluid may be transferred to the pressure measurement module 220 to be described later. can be moved to

In one embodiment, the voltage measuring device 30 is connected to the detection probe 20, receives voltage information detected through the detection probe 20, and measures the fluid flowing through the structure 10 based on the received voltage information. Heat flux can be detected. For example, the voltage measurer 30 indirectly measures the heat flux of the fluid flowing through the structure 10 based on a database for a correlation between the voltage measured through the detection probe 20 and the heat flux of the fluid. can be measured

In one embodiment, the pressure measuring device 40 may be connected to the detection probe 20 and measure the pressure of the fluid flowing through the structure 10 . For example, the pressure measuring device 40 may receive the fluid flowing through the structure 10 through the detection probe 20 and measure the flow pressure of the fluid. Detection of the pressure of the fluid through the pressure gauge 40 can be performed in a variety of known ways.

The detection probe 20 according to an embodiment may include a housing 200, a heat flux measurement module 210, a pressure measurement module 220, and a cooling water path 230.

In one embodiment, the housing 200 may form the exterior of the detection probe 20. In one embodiment, the housing 200 may be directly connected to the structure 10, for example, to a pipe. In one embodiment, the housing 200 may be connected to directly contact the structure 10 through the front side 200A.

In one embodiment, the heat flux measurement module 210 may function to measure the heat flux of a fluid. For example, it may be a garden gauge. In one embodiment, the heat flux measurement module 210 may be disposed inside the housing 200 . In one embodiment, the heat flux measurement module 210 may include a foil 211 and wires 212 disposed on the front side 200A of the housing 200 .

In one embodiment, the foil 211 may be disposed on the first portion 2001 of the front surface 200A of the housing 200 . In one embodiment, while the detection probe 20 is connected to the structure 10, the foil 211 may be in direct contact with the fluid. Foil 211 may be heated by a fluid. In one embodiment, the foil 211 may be formed of a resistance material with high thermal durability. For example, the foil 211 may include a constantan material formed of copper and nickel. In this case, the foil 211 can be used for temperature measurement by having a constant electrical resistivity in a wide temperature range.

In one embodiment, the wires 212 may include a first wire 2121 and a second wire 2122. The wires 212 may include a conductive material, for example copper material. In one embodiment, the wires 212 may be disposed along the inside of the housing 200, and each end of the wires 212 may extend to be connected to the voltage meter 30. In one embodiment, one end of the first wire 2121 may be directly connected to the foil 211, and the other end may extend along the inside of the housing 200 and be connected to the voltage meter 30. In one embodiment, the second wire 2122 may have one end connected to the inside of the housing 200 and the other end extending along the inside of the housing 200 and connected to the voltage measuring device 30 . The second wire 2122 may be used to detect a reference voltage for the voltage measured through the first wire 2121 .

In one embodiment, when the foil 211 is in contact with a fluid, a parabolic temperature distribution having a maximum value at the center point of the foil 211 may appear on the surface of the foil 211 . In one embodiment, the first wire 2121 is connected to the central point of the foil 211 and may be used to detect a corresponding voltage according to the temperature of the surface of the foil 211 . In this case, the second wire 2122 is used to detect a corresponding voltage according to the temperature of the housing 200 itself and can act as a reference electrode. The voltage measurer 30 may indirectly detect the heat flux of the fluid by comparing the voltage difference detected through the first wire 2121 and the second wire 2122 with a table.

In one embodiment, the pressure measurement module 220 may function to measure the pressure of a fluid. For example, the pressure measurement module 220 may have a pitot tube structure. A pitot tube is a device that measures flow rate and/or flow rate in a flow path by inserting a sensing unit into the center of the flow path. The pitot tube may measure total pressure and static pressure of the fluid, and measure the pressure of the flowing fluid based on a difference between the two measured pressures.

In one embodiment, the pressure measuring module 220 is formed on the front (200A) surface of the first flow path 221, the second flow path 222, and the housing 200, and is an inlet of the first flow path 221. 1 inlet 2210, a second inlet 2220 formed on the front surface (200A) of the housing 200 and serving as an inlet of the second flow path 222, and a first barrier that may be disposed on the first flow path 221 (22101) and a second barrier that may be disposed in the second passage 222.

In one embodiment, the first inlet 2210 may be formed in the second portion 2002 of the front surface 200A of the housing 200 . In this case, the second part 2002 may be located at a position different from the first part 2001 where the foil 211 is disposed. In one embodiment, the first inlet 2210 is a passage through which fluid flowing through the structure 10 can flow into the housing 200 while the front side 200A of the housing 200 is connected to the structure 10. can function as

In one embodiment, the first flow path 221 may be formed along the inside of the housing 200 and communicate with the first inlet 2210 and the pressure measuring device 40 to form a fluid movement path. In one embodiment, the first passage 221 may include a first passage portion 2211 and a second passage portion 2212. In one embodiment, the first flow path portion 2211 is connected to the first inlet 2210 in the first flow path 221, and the second flow path portion 2212 is connected to the first flow path portion 221 in the first flow path 221 ( 2211) and the pressure measuring device 40 may be connected.

In one embodiment, the second inlet 2220 may be formed in the third part 2003 of the front surface 200A of the housing 200 . In this case, the third portion 2003 may be at a position different from the first portion 2001 where the foil 211 is disposed and the second portion 2002 where the first inlet 2210 is formed. In one embodiment, the second inlet 2220 is a passage through which fluid flowing through the structure 10 can flow into the housing 200 while the front side 200A of the housing 200 is connected to the structure 10. can function as

In one embodiment, the second flow passage 222 may be formed along the inside of the housing 200 and communicate with the second inlet 2220 and the pressure measuring device 40 to form a fluid movement path. In one embodiment, the second passage 222 may include a third passage portion 2221 and a fourth passage portion 2222 . In one embodiment, the third flow path portion 2221 is connected to the second inlet 2220 in the second flow path 222, and the fourth flow path portion 2222 is connected to the third flow path portion from the second flow path 222 ( 2221) and the pressure measuring device 40 may be connected.

In one embodiment, the second flow path 222 may be used to correct the pressure of the fluid measured through the fluid flowing through the first flow path 221 . For example, since the fluid has unstable flow characteristics in a high-temperature environment, the characteristics of the fluid flowing in through the first flow path 221 and the second flow path 222 are detected through the pressure measuring device 40 to more accurately pressure can be detected.

In one embodiment, the first barrier 22101 and the second barrier may be formed in at least part of the first passage 221 and the second passage 222, respectively. In one embodiment, the first barrier 22101 and the second barrier may perform a function of acceleration nozzles that stabilize the flow of the fluid by accelerating the flow rate of the fluid introduced through the inlet by locally reducing the cross-sectional area of the passage. can In one embodiment, the first barrier 22101 may be formed in the first passage portion 2211 connected to the first inlet 2210, and the second barrier may be formed in the third passage connected to the second inlet 2220. It may be formed in portion 2221.

In one embodiment, the cooling water path 230 may cool the detection probe 20 . The cooling water passage 230 is disposed inside the housing 200 and lowers the temperature of the detection probe 20 by flowing cooling water along the inside of the detection probe 20 and a device connected to the detection probe 20 (eg, voltage Damage to the measuring device 30 and the pressure measuring device 40 can be prevented. In one embodiment, the cooling water path 230 is formed in a coil shape surrounding the wires 212, the first flow path 221 and the second flow path 222, and coolant flows along the inside of the wires 212. , the first flow path 221 and the second flow path 222 can be cooled.

In one embodiment, the cooling water path 230 may include a cooling inlet 232 and a cooling outlet 231 . In one embodiment, the cooling water passage 230 receives cooling water into the housing 200 through the cooling inlet 232 and discharges the cooling water circulating therein to the outside of the housing 200 through the cooling outlet 231. can

In one embodiment, the foil 211 of the heat flux measurement module 210 and the first inlet 2210 and the second inlet 2220 of the pressure measurement module 220 are provided on the front surface 200A of the housing 200. can be placed. For example, the foil 211 is disposed on the first part 2001 of the front surface 200A of the housing 200, the first inlet 2210 is disposed on the second part 2002, and the third part A second inlet 2220 may be disposed at 2003. In one embodiment, the second inlet 2220 is formed on the opposite side of the first inlet 2210 based on the center of the housing 200 in a state in which the front 200A of the housing 200 is viewed as shown in FIG. 5 . It can be. For example, in one embodiment, the second inlet 2220 may be disposed symmetrically with respect to the center of the first inlet 2210 and the front 200A of the housing 200 . In one embodiment, the foil 211 may be disposed between the first inlet 2210 and the second inlet 2220 . In this case, the center of the front side 200A of the housing 200 may be located in the first part 2001 where the foil 211 is disposed.

The detection system 1 according to an embodiment may simultaneously measure the heat flux and pressure of the high-temperature fluid at the same time and location through the detection probe 20 . The pressure measuring device 40 may more accurately detect the heat flux of the high-temperature fluid based on the result measured by the voltage measuring device 30 . For example, as the fluid moves inside the housing 200, the pressure of the fluid may change due to cooling water. The pressure of the fluid can be precisely measured by correcting the pressure change of the fluid. For example, the detection system 1 can reduce errors that may occur in measuring the pressure of the fluid.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

1: detection system
10: structure
20: detection probe
30: voltage meter
40: pressure measuring instrument
200: housing
210: heat flux measurement module
220: pressure measuring module

Claims (10)

A detection probe for detecting a state of a fluid in a high-temperature environment,
a probe housing connected to the structure;
a heat flux measurement module including a foil disposed on a first portion of the front of the probe housing and a wire connecting the foil and a voltage meter along an inside of the probe housing; and
A pressure measuring module including a first inlet formed in a second part of the front of the probe housing and into which the fluid flows, and a first flow path formed along the inside of the probe housing and communicating with the first inlet and a pressure measuring device. Including, detection probe. According to claim 1,
The detection probe further comprises a cooling water passage formed inside the probe housing and through which cooling water for cooling the electric wire and the first passage flows. According to claim 2,
The cooling water path is formed in a coil shape surrounding at least a portion of the electric wire and the first flow path, the detection probe. According to claim 1,
The first flow path includes a first flow path portion connected to the first inlet and a second flow path portion connecting the first flow path portion and the pressure measuring device,
The detection probe, wherein the first passage portion includes a barrier protruding inward with respect to a cross section to accelerate a flow speed of the fluid introduced through the first inlet. According to claim 1,
The pressure measurement module
A second inlet formed in a third part of the front of the probe housing and through which the fluid flows, and a second flow path formed along the inside of the probe housing and communicating with the second inlet and the pressure measuring device, detection probe. According to claim 5,
Wherein the second inlet is formed on the opposite side of the first inlet with respect to the center of the probe housing in a state of looking at the front of the probe housing. According to claim 6,
The first inlet and the second inlet,
Detection probes disposed symmetrically with respect to the front center of the probe housing. According to claim 5,
The foil is disposed between the first inlet and the second inlet,
The detection probe, wherein the front center of the probe housing is located in the foil. According to claim 1,
The heat flux measurement module and the pressure measurement module are capable of simultaneously measuring the temperature and pressure of the fluid, the detection probe. A detection system for detecting a state of a fluid in a high-temperature environment,
The detection system,
detection probe;
a voltage meter connected to the detection probe and measuring the heat flux of the fluid; and
It is connected to the detection probe and includes a pressure measuring device for measuring the pressure of the fluid,
The detection probe,
a heat flux measurement module including a foil disposed on a first portion of the front of the probe housing and a wire connecting the foil and the voltage meter along an inside of the probe housing; and
A pressure measurement module including a first inlet formed in a second part of the front of the probe housing and through which the fluid flows, and a first flow path formed along the inside of the probe housing and communicating with the first inlet and the pressure measuring device. ; and
A cooling water passage formed inside the probe housing and through which cooling water for cooling the electric wire and the first passage flows;
The pressure meter,
The detection system detects the pressure of the fluid by correcting a pressure change of the fluid by the cooling water through the heat flux of the fluid measured by the voltage meter.

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