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Electro-arc heater airflow enthalpy value spectral measurement system

An arc heater and spectral measurement technology, applied in thermal excitation analysis, material excitation analysis, etc., can solve problems such as enthalpy error, and achieve the effects of avoiding complex calculations, high time resolution, and low price

Active Publication Date: 2018-04-06
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
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Problems solved by technology

[0004] The technical problem of the present invention is to solve the enthalpy error caused by the measurement error of various parameters such as air flow and heater arc chamber pressure in the process of determining the enthalpy value of the air flow by the existing equilibrium sound velocity method. The direct correspondence of the airflow enthalpy value can conveniently and quickly obtain the quantitative enthalpy value of the arc heater airflow, and can realize the real-time online monitoring of the multi-track airflow enthalpy value during the test debugging and model heat assessment test

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[0032] 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.

[0033] figure 1 It is a structural diagram of an arc heater gas flow enthalpy spectrum measurement system in an embodiment of the present invention, including: an arc heater 1, a nozzle 2, a spectrum measurement compression piece 3, an optical fiber 6, a spectrum acquisition unit 7, and a host computer 8;

[0034] The arc heater 1 heats the incoming air to form a high-temperature airflow, and after the expansion and acceleration of the nozzle 2, a high-speed airflow is formed at the outlet of the nozzle; the spect...

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Abstract

The invention discloses an electro-arc heater airflow enthalpy value spectral measurement system. Based on the emission spectrum diagnosis technology, the electro-arc heater airflow enthalpy value spectral measurement system is used for acquiring the enthalpy value characteristic of high enthalpy air flow in ground heat prevention test of an electro-arc heater, the emission spectrum intensity of atom oxygen or atom nitrogen can be measured through experiments, and the enthalpy value of the airflow can be directly obtained by utilizing the quantitative relation between the emission spectrum intensity ratio of target component and the enthalpy value of high-temperature airflow. Based on the method, the quantitative measurement on the enthalpy value within the range of low enthalpy (5MJ / kg) to high enthalpy (25MJ / kg) can be realized, and the electro-arc heater airflow enthalpy value spectral measurement system is applicable to the diagnosis of total enthalpy value of airflow of various stacked, segmented, tubular electro-arc heaters.

Description

technical field [0001] The invention relates to an arc heater gas flow enthalpy spectrum measurement system and method, which is used in ground simulation tests of arc heaters such as laminations, segments, and tubes, and uses the emission spectrum measurement system to monitor the emission spectrum of the high-temperature flow field in the arc heater in real time , by analyzing the relative change of OI 777.19nm characteristic spectral intensity, the total enthalpy of the arc heater high-temperature gas flow was obtained. It belongs to the research field of aircraft ground aerodynamic thermal test. Background technique [0002] The arc heater is an important test platform to study the aerodynamic thermal protection of aircraft, and its working state and air quality directly determine the reliability of the test. At present, the existing arc heater equipment mainly has several methods such as lamination, segment, and tube. Tubular arc heaters, also known as Linde (Linde ty...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
CPCG01N21/71
Inventor 曾徽欧东斌陈连忠
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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