变状态测量中薄壁量热计后壁导热损失修正

杨庆涛; 白菡尘; 刘济春

doi:10.13224/j.cnki.jasp.2015.02.012

变状态测量中薄壁量热计后壁导热损失修正

doi: 10.13224/j.cnki.jasp.2015.02.012

1. 中国空气动力研究与发展中心超高速空气动力研究所高超声速冲压发动机技术重点实验室, 四川绵阳 621000;
2. 中国空气动力研究与发展中心超高速空气动力研究所, 四川绵阳 621000

基金项目:

高超声速冲压发动机技术重点实验室开放课题(STSKFKT2012003)

中国空气动力研究与发展中心AED项目

详细信息

作者简介:
杨庆涛(1975-),男,山东茌平人,助理研究员,硕士,主要从事热防护试验测量技术研究.

中图分类号: V441
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出版历程
- 收稿日期: 2013-10-11
- 刊出日期: 2015-02-28

Heat conduction loss correction of thin-skin calorimeter on back surface for state-variable measurement

1. Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China;
2. Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

摘要

摘要: 针对超燃冲压发动机脉冲燃烧试验需求,基于能量平衡原理给出了对变状态条件下修正薄壁量热计导热损失的一种方法.对薄壁量热计进行了数值分析和试验验证,对比分析了修正前后的薄壁量热计测量结果.有限元分析结果表明,该方法可以有效补偿后壁导热损失,算例中修正前的热流测量误差不小于20%,修正后不大于4%.在超燃冲压发动机脉冲燃烧试验中,利用薄壁量热计与同轴热电偶热流测量了轴对称模型壁面上相同轴向位置的热流,冷态试验中修正前后的薄壁热流与同轴热电偶热流测量结果的相对偏差分别为-11.2%和3.3%.热态试验结果表明,试验中存在振荡燃烧现象,薄壁量热计的响应时间约为0.02s,与振荡周期(约为0.03s)接近,不能正确反映燃烧状态的变化.
- 薄壁量热计 /
- 超燃冲压发动机 /
- 热流测量 /
- 导热损失 /
- 修正方法
Abstract: A heat conduction loss correction method of thin-skin calorimeter under state-variable conditions based on energy balance principle was presented to meet the requirements for scramjet pulse combustion tests. Then thin-skin calorimeter was numerically simulated and verified in a test, and the measurement results with/without correction were compared and analyzed. Finite element analysis showes that the method can compensate the heat conduction loss on the back surface, and the measurement errors of the heat flux with correction are not greater than 4%, while those without correction are not less than 20% for the numerial examples. Thin-skin calorimeter and coaxial thermocouple were used in scramjet pulse combustion test to measure the surface heat fluxes at the same axial positions of the axsymmetric model. In cold-state test, the relative deviation between the heat flux results is -11.2% without correction using thin-skin calorimeter and using coaxial thermocouple, and is 3.3% with correction. Hot-state test results indicate that oscillation combustion occurs during the test, and the thin-skin calorimeter used in the test can not reflect change of the combustion states because the response time of the thin-skin calorimeter is about 0.02s, which is close to the oscillation period (about 0.03s).
- thin-skin calorimeter /
- scramjet /
- heat flux measurement /
- heat conduction loss /
- correction method

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