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Laminated arc heater high-enthalpy airflow parameter diagnosis system

An arc heater and airflow parameter technology, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of limiting aircraft heat-proof materials and heat-proof structures, accurate quantification of difficult and high-temperature flow fields, etc., to meet the needs of heat-proof and strength. , to avoid mutual interference, the effect of high applicability

Active Publication Date: 2018-04-13
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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  • Laminated arc heater high-enthalpy airflow parameter diagnosis system
  • Laminated arc heater high-enthalpy airflow parameter diagnosis system
  • Laminated arc heater high-enthalpy airflow parameter diagnosis system

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Embodiment Construction

[0034]The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0035] figure 1 It is a structural diagram of a high-enthalpy gas flow parameter diagnosis system for a laminated arc heater in an embodiment of the present invention, including: an arc heater 1, a nozzle 2, an optical measuring chip 3, a multimode optical fiber 4, a laser receiving unit 18, a single-mode Optical fiber 7, laser emitting unit 19, host computer 17. The laser emitting unit 19 includes a fiber beam splitter 12 , an Etalon etalon 13 , a semiconductor laser 14 , a laser controller 15 and a signal genera...

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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 invention relates to a laser absorption spectrum technology for diagnosis of high-enthalpy gas flow in a laminated arc heater. It is used in the ground simulation test of a high-enthalpy laminated arc heater and uses a laser absorption spectrum measurement system to measure the high temperature in the arc heater in real time. Flow field, by analyzing the changes of the OI 777.19nm incident laser and outgoing laser, the static temperature and key component atomic oxygen particle number density of the arc heater high-temperature gas flow are obtained. It belongs to the research field of aircraft ground aerodynamic thermal test. Background technique [0002] The arc wind tunnel is an important ground test equipment for hypersonic vehicle reentry and thermal protection research, and it is one of the key technologies and core competitiveness of space exploration for major aerospace countries. When a hypersonic vehicle re-enters the atmosphere, due to t...

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Application Information

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Patent Type & Authority Applications(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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