CN218822800U - High-temperature gas standard source radiation system - Google Patents
High-temperature gas standard source radiation system Download PDFInfo
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- CN218822800U CN218822800U CN202223207448.XU CN202223207448U CN218822800U CN 218822800 U CN218822800 U CN 218822800U CN 202223207448 U CN202223207448 U CN 202223207448U CN 218822800 U CN218822800 U CN 218822800U
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Abstract
The utility model discloses a high-temperature gas standard source radiation system, which comprises a gas mixing device, a liquid gasification instrument, a water cooling system and a high-temperature heating furnace, wherein the gas mixing device and the liquid gasification instrument are respectively connected with a mixed gas check valve and then connected with a tubular furnace air inlet of the high-temperature heating furnace; the main body of the high-temperature heating furnace is a high-temperature heating furnace tube, and two side surfaces of the high-temperature heating furnace tube are provided with high-transmittance glass of the characteristic spectrum of the gas to be detected; the two sides of the high-temperature heating furnace tube are respectively provided with a tube furnace air inlet and a tube furnace air outlet; a standard thermocouple is arranged on the high-temperature heating furnace tube; the water cooling system is connected with the high-temperature heating furnace through a cooling water inlet and a cooling water outlet. The invention solves the problems that the gas component emissivity of the tail flame of the solid rocket engine is unknown and the measurement result can not be corrected, and improves the measurement precision of the tail flame temperature.
Description
Technical Field
The utility model relates to a source radiation system, concretely relates to high temperature gas standard source radiation system.
Background
The tail flame of a solid rocket engine often presents the characteristics of high temperature, high speed and unbalanced flow dynamics. The knowledge of the tail flame temperature has important significance for optimizing the formula of the engine propellant, analyzing the propellant combustion field, evaluating the performance of the thermal protection material, improving the conversion efficiency of the spray pipe and the like. However, because the components of the tail flame of the engine are extremely complex, for the characterization and the test of the temperature of the tail flame, not only the influence of solid particles on the temperature measurement but also the influence of gas components on the temperature measurement need to be considered. Particularly, when the gas spectral information is used for inverting the temperature, the spectral emissivity of a gas material is greatly influenced by factors such as concentration analysis, secondary combustion, temperature difference, gas-solid two-phase flow characteristics and the like, so that the real temperature measurement difficulty is greatly increased.
The current temperature measurement methods are roughly divided into two types: namely contact temperature measurement and non-contact temperature measurement. The former has the most widely used thermocouples and thermal resistors; the latter is mainly based on radiation thermometry. Among the commonly used measurement tools in radiation thermometry are single wavelength thermometers, colorimetric thermometers, and full wavelength radiation thermometers. The radiation thermometry method generally measures not the actual temperature of an object but brightness temperature, color temperature, radiation temperature and the like, and the material emissivity of the measured object needs to be known on the premise of obtaining the true temperature. Therefore, whether the emissivity of the material is accurate is directly related to the accuracy of the measured temperature. In the research related to the emissivity of materials, the research ideas applied to the materials are mainly divided into the following parts: the first method is to construct a test platform in advance to measure the emissivity of the object material and correct the test result according to the obtained data. The method has wide application range. In order to improve the test accuracy, sometimes it is necessary to reduce the emissivity effect, i.e. approaching the blackbody method, but the limit is more limited by the tested object. And the indirect measurement method is used for obtaining the emissivity by measuring the reflectivity of the measured object so as to obtain the true temperature. The multispectral radiation thermometry method solves an equation by obtaining the radiation brightness information of a plurality of measured objects to obtain the spectral emissivity of an object. The method can achieve better test effect aiming at solid materials in static or laboratory environment. In the case of a solid rocket engine tail flame, the constituents thereof contain not only solid particles but also gas mixture components. For the measurement of the gas component characteristic spectrum emissivity, domestic related research is less at present, and foreign aspects only provide some characteristic temperature points and do not establish a gas characteristic spectrum emissivity database aiming at measurement temperature calibration. Therefore, in order to correct the data of the solid-borne tail flame temperature test, it is necessary to establish a gas characteristic spectral emission rate database for tail flame gas components.
At present, for a real temperature measurement technology of tail flame of a solid rocket engine, contact temperature measurement, radiation temperature measurement and other measures are commonly adopted. In the aspect of contact temperature measurement, a thermocouple is used for measuring the flame temperature, although part of real temperature data of the tail flame can be obtained. However, the thermocouple may change the original temperature field distribution of the measured object, and especially in the high temperature stage, the measuring tool may fail or even be damaged too early due to the heat flow impact and the high temperature heating. And the contact type temperature measurement has an error between the dynamic temperature and the static temperature. In the aspect of radiation temperature measurement technology, the test accuracy is closely related to the actual working condition of the object to be tested, and a more ideal test result can be obtained in a quasi-static or laboratory environment. In a ground ignition test of a solid rocket engine, effective components of a tail flame comprise solid particles and gas-phase components, the true temperature of the tail flame is measured by adopting a radiation thermometry method, and the spectral information of the measured solid particles is complex, so that the identification of the effective characteristic information is difficult. And the gas radiation narrow-band spectrum information is relatively less, and the characteristic identification is easier. At present, domestic and foreign researches on the method are few particularly aiming at the application research in the field of solid rocket engine tail flame temperature testing, and no effective method for measuring and calibrating the solid rocket engine tail flame temperature is available. A standard mixed gas spectral emissivity test system is required to be constructed for tail flame gas components of the solid rocket engine, a mixed gas spectral emissivity database is obtained, a tail flame temperature radiation measurement result is corrected, and then the true temperature of the tail flame of the solid rocket engine is accurately obtained.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a high-temperature gas standard source radiation system to solve among the current solid rocket engine tail flame temperature measurement gas composition temperature error and revise, realize the accurate measuring problem of solid rocket engine tail flame true temperature.
For solving the technical problem who exists, the utility model discloses a technical scheme be: a high-temperature gas standard source radiation system comprises a gas mixing device, a liquid gasifier, a water cooling system and a high-temperature heating furnace, wherein the gas mixing device and the liquid gasifier are respectively connected with a mixed gas check valve and then connected with a tubular furnace gas inlet of the high-temperature heating furnace; the main body of the high-temperature heating furnace is a high-temperature heating furnace tube, and two side surfaces of the high-temperature heating furnace tube are provided with high-transmittance glass of the characteristic spectrum of the gas to be detected; the two sides of the high-temperature heating furnace tube are respectively provided with a tube furnace gas inlet and a tube furnace gas outlet, and the mixed gas is conveyed into the high-temperature heating furnace tube through the tube furnace gas inlet to be heated and then is discharged through the tube furnace gas outlet; the high-temperature heating furnace tube is provided with a standard thermocouple for monitoring the real-time temperature of gas in the high-temperature heating furnace tube in real time; the water cooling system is connected with the high-temperature heating furnace through a cooling water inlet and a cooling water outlet, and cools the high-transmittance glass window of the characteristic spectrum of the gas to be measured through a cooling device arranged on the high-temperature heating furnace tube.
Furthermore, a pressure gauge, an air inlet check valve and an air outlet check valve are respectively arranged on pipelines of an air inlet and an air outlet of the tubular furnace of the high-temperature heating furnace tube.
Furthermore, the high-temperature gas standard source radiation system also comprises a radiation pyrometer, and the radiation pyrometer measures the radiation temperature of the high-temperature gas through a high-transmittance glass window of the characteristic spectrum of the gas to be measured.
Furthermore, the high-temperature gas standard source radiation system also comprises a vacuum system, the vacuum system is connected with the gas outlet of the tube furnace of the high-temperature heating furnace tube, and the vacuum system enables the gas pressure inside the high-temperature heating furnace tube to be far higher than the gas pressure outside the high-temperature heating furnace tube by vacuumizing the inner cavity, so that the gas in the high-temperature heating furnace tube is discharged.
According to the invention, a standard gas source radiation system with adjustable concentration and temperature is constructed, a high-temperature radiometer and a narrow-band filter are used for measurement through an open window of a characteristic spectrum, and the measurement is compared with a standard thermocouple, so that the emissivity of mixed gas at different concentrations and different temperatures is obtained.
The invention not only aims at the construction of the tail flame mixed gas standard source of the solid rocket engine, but also can be applied to the research of the true temperature measurement technology in the fields of liquid rocket engines, aero-engines, gas turbines and the like
Advantageous effects
The invention can solve the problems that the gas component emissivity of the tail flame of the solid rocket engine is unknown and the measurement result cannot be corrected, and improve the measurement precision of the tail flame temperature. The platform can be constructed to establish a mixed gas emission rate database, and the established platform is more convenient for the measurement of the spectral emission rates of different gases with different concentrations and different temperatures.
Drawings
FIG. 1 is a schematic diagram of the working structure of a standard source radiation system for high-temperature gas, wherein the reference numbers in the diagram are respectively as follows: 1-gas mixing device: 11-standard flow meter: 12-mixed gas check valve: 2-liquid gasification instrument; 3-a water cooling system; 4-high temperature heating furnace; 41-gas characteristic spectrum high transmittance glass to be detected; 42-stainless steel attachment flanges; 43- -Cooling Water inlet; 44-a cooling water outlet; 45-tube furnace inlet; 46-an inlet check valve; 47-pressure gauge; 48-standard thermocouple; 49-heating the furnace tube; 410 a tube furnace gas outlet; 411 air outlet check valve; 5-a pyrometer radiometer; 6-a vacuum system;
FIG. 2 is H 2 An O characteristic spectrum;
FIG. 3 is CO 2 A characteristic spectrum;
fig. 4 is a CO characteristic spectrum.
Detailed Description
The present invention is further described in detail below with reference to specific examples so that the advantages and features of the present invention will be readily understood by those skilled in the art, and the scope of the present invention will be more clearly defined.
As shown in figure 1, the method is used for constructing a high-temperature gas standard source radiation system and obtaining the spectral emissivity data of mixed gas with different components, different concentrations and different temperatures. The method comprises the following components: the device comprises a gas mixing device 1, a liquid gasifier 2, a water cooling system 3, a high-temperature heating furnace 4 and a vacuum system 6.
The gas mixing device 1 can mix the specified gas source according to the required concentration and proportion, accurately obtain the gas standard source with the required concentration, and ensure the control precision of the concentration of the mixed gas to be 100ppm.
And the standard flowmeter 11 is used for measuring through the standard flowmeter and converting through a corresponding formula to obtain the concentration of the input mixed gas.
And a mixed gas check valve 12, which corresponds to the input control of the standard gas source through check valve control.
The liquid vaporizer 2 heats the liquid water to obtain vapor gas with a predetermined concentration. Mixed with the standard gas source in the gas mixing device 1 and then the mixed gas is delivered.
The water cooling system 3 is connected to the high-temperature heating furnace 4 through a cooling water inlet 43 and a cooling water outlet 44. The circulating water cools the high-transmittance glass window of the characteristic spectrum of the gas to be measured, the spectral transmittance of the glass window is prevented from changing due to the interference of high-temperature gas, the glass material of the observation window is subjected to high-temperature reaction at high temperature, the physicochemical properties of the material are changed, the uncertainty of the characteristic spectrum of the gas is influenced, and meanwhile, the strength of the material can be improved and the reliability of the material can be improved due to the cooling of the circulating water.
The high-temperature heating furnace 4 comprises gas characteristic spectrum high-transmittance glass 41 to be measured, a stainless steel connecting flange 42, an air inlet check valve 46, a pressure gauge 47, a standard thermocouple 48, a high-temperature heating furnace tube 49 and an air outlet check valve 411. The mixed gas enters the high-temperature heating furnace tube 4 through the gas inlet 45 of the tube furnace, and the pressure gauge 47 monitors the gas pressure change of the gas inlet in real time. The gas is heated in the high-temperature heating furnace tube 4, and the real-time temperature of the gas in the tube is monitored in real time by a standard thermocouple 48. Exits the heating furnace tube through tube furnace exit port 410. In the process, the circulating water in the water cooling system 3 enters through the cooling water inlet 43 and is discharged through the cooling water outlet 44.
The gas with the concentration determined according to the determined proportion is heated to the specified temperature by the high-temperature heating furnace tube 49, the indexes of the material strength and the sealing performance of the gas meet that the pressure in the furnace is not more than 1.5 standard atmospheric pressures, and the high-temperature heating furnace simultaneously meets the temperature control precision of +/-1 ℃ (the heating temperature can reach 1650 ℃).
The radiation pyrometer 5, with a standard narrow-band filter, measures the high-temperature gas radiation temperature through the observation window, and calculates the gas component emissivity in correlation with the actual gas temperature.
The vacuum system 6 enables the air pressure in the high-temperature heating furnace to be far higher than the air pressure outside the furnace by vacuumizing the inner cavity, so that the air pressure in the furnace is smoothly discharged.
The invention can mix CO through a standard gas mixing device 2 、N 2 And the concentration accurate proportioning is realized by the gases. The liquefied water can be converted into vapor gas through the liquefied vaporizer. The heating pipe and the accessory part structure thereof are specially designed, so that gas inlet and outlet and subsequent observation and test work are facilitated, a water cooling system is added to cool the quartz observation window, the structural reliability is improved, the influence of high temperature on the physicochemical property of the observation window is reduced, and the calibration is eliminatedAnd (4) a quasi-error.
The invention is shown in the following figures 2-4 by measuring the characteristic spectrum of part of gas components through experiments.
Claims (4)
1. The utility model provides a high temperature gas standard source radiation system, includes gas mixing device (1), liquid gasification appearance (2), water cooling system (3) and high temperature heating furnace (4), its characterized in that:
the gas mixing device (1) and the liquid vaporizer (2) are respectively connected with the mixed gas check valve (12) and then connected with the tubular furnace gas inlet (45) of the high-temperature heating furnace (4), the gas mixing device (1) mixes a specified gas source according to required concentration and proportion, the liquid vaporizer (2) heats liquid water to obtain water vapor gas with specified concentration, and the gas source mixed by the gas mixing device (1) and the mixed gas obtained by mixing the water vapor gas heated by the liquid vaporizer (2) in the pipeline of the mixed gas check valve (12) are conveyed into the high-temperature heating furnace (4) through the tubular furnace gas inlet (45);
the main body of the high-temperature heating furnace (4) is a high-temperature heating furnace tube (49), and two side surfaces of the high-temperature heating furnace tube (49) are provided with high-transmittance glass (41) of the characteristic spectrum of the gas to be detected; the two sides of the high-temperature heating furnace tube (49) are respectively provided with a tube furnace gas inlet (45) and a tube furnace gas outlet (410), and the mixed gas is conveyed into the high-temperature heating furnace tube (49) through the tube furnace gas inlet (45) for heating and then is discharged through the tube furnace gas outlet (410); the high-temperature heating furnace tube (49) is provided with a standard thermocouple (48) for monitoring the real-time temperature of the gas in the high-temperature heating furnace tube (49) in real time;
the water cooling system (3) is connected with the high-temperature heating furnace (4) through a cooling water inlet (43) and a cooling water outlet (44), and cools the window of the high-transmittance glass (41) of the characteristic spectrum of the gas to be measured through a cooling device arranged on the high-temperature heating furnace tube (49).
2. A hot gas standard source irradiance system as claimed in claim 1, wherein: and a pressure gauge (47), an air inlet check valve (46) and an air outlet check valve (411) are respectively arranged on pipelines of a tube furnace air inlet (45) and a tube furnace air outlet (410) of the high-temperature heating furnace tube (49).
3. The high temperature gas standard source radiation system of claim 1, wherein: the high-temperature gas standard source radiation system further comprises a radiation pyrometer (5), and the radiation pyrometer (5) measures the radiation temperature of the high-temperature gas through a window of the high-transmittance glass (41) with the characteristic spectrum of the gas to be measured.
4. The high temperature gas standard source radiation system of claim 1, wherein: the high-temperature gas standard source radiation system further comprises a vacuum system (6), the vacuum system (6) is connected with a tube furnace gas outlet (410) of the high-temperature heating furnace tube (49), and the vacuum system (6) enables the gas pressure inside the high-temperature heating furnace tube (49) to be far higher than the outside of the high-temperature heating furnace tube (49) through vacuumizing the inner cavity, so that gas in the high-temperature heating furnace tube (49) is discharged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223207448.XU CN218822800U (en) | 2022-11-30 | 2022-11-30 | High-temperature gas standard source radiation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223207448.XU CN218822800U (en) | 2022-11-30 | 2022-11-30 | High-temperature gas standard source radiation system |
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