Diagnosis system for high enthalpy gas flow parameters of laminated arc heater

A technology of arc heater and air flow parameters, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of accurate quantification of difficult high-temperature flow fields, restrictions on aircraft heat-proof materials and heat-proof structures, and meet the needs of heat protection and strength , low maintenance cost, high time resolution effect

Active Publication Date: 2021-03-26
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology

It is difficult to accurately quantify the high-temperature flow field by traditional contact measurement methods, which limits the development of research on aircraft heat-resistant materials and heat-resistant structures.

Method used

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  • Diagnosis system for high enthalpy gas flow parameters of laminated arc heater
  • Diagnosis system for high enthalpy gas flow parameters of laminated arc heater
  • Diagnosis system for high enthalpy gas flow parameters of laminated arc heater

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Embodiment Construction

[0034]The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be appreciated that the specific embodiments described herein are merely illustrative of the invention and are not limited thereto. It will also be noted that in order to facilitate the description, only the parts associated with the present invention are shown in the drawings rather than all structures.

[0035] figure 1 A structural diagram of a laminated airflow parameter diagnostic system for a laminated arc heater in an embodiment of the present invention, including: arc heater 1, nozzle 2, optical measuring sheet 3, multimode optical fiber 4, laser receiving unit 18, single mode Fiber 7, laser emission unit 19, host machine 17. The laser emission unit 19 includes an optical fiber beam splitter 12, an ETALON standard, a semiconductor laser 14, a laser controller 15, and a signal generator 16, and the laser receiving unit 18 includes a silic...

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Abstract

A laminated arc heater high-enthalpy airflow parameter diagnosis system is used for obtaining the airflow parameters (particle number density and static temperature) of a high temperature flow field in the ground heat protection test of an arc heater, and online diagnosing high temperature disassociated air test airflow in the arc heater by using an atom O (777.19 nm) spectral line to obtain the plasma airflow temperature and the atom oxygen particle number density in the arc heater. The system can be used as a routine way for the arc heater high-enthalpy airflow parameter diagnosis.

Description

Technical field [0001] The present invention relates to a laser absorption spectroscopy technique for laminated electric arc heaters, for high-imboquir-type arc heater ground simulation test, using laser absorption spectral measuring system real-time measurement of electric arc heaters in real time Flow field, by analyzing the change of OI 777.19 nm incident laser and exit laser, the temperature of the high temperature gas flow of the electric arc heater and the key component atomic oxygen particle number density is obtained. It belongs to the field of aerodynamic heat test in the ground. Background technique [0002] The arc wind tunnel is an important terrestrial test equipment for the re-entering and thermal protection research of high ultrasound, which is one of the key technologies of space exploration of each aerospace. High ultrasound speed aircraft re-enters the atmosphere, due to strong waves and viscous hysteresis, the temperature of the excitement can reach thousands o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 曾徽欧东斌陈连忠
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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