Development of the detonation-driven expansion tube for orbital speed experiments

The hypersonic flow at orbital speeds is a fundamental issue for the ground tests of aerospace crafts. The detonation-driven high-enthalpy expansion tube （JF16 expansion tube） was developed to investigate re-entry physics. A forward detonation cavity （FDC） driver was applied in the JF16 expansion tu...

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Bibliographic Details
Published in:Science China. Technological sciences 2015-04, Vol.58 (4), p.695-700
Main Authors: Jiang, ZongLin, Wu, Bo, Gao, YunLiang, Zhao, Wei, Hu, ZongMin
Format: Article
Language:English
Subjects:
Acceleration
China
Decay
Detonation
Engineering
Expansion tubes
Flow stability
Ground tests
Orbitals
地面试验
实验
流动可视化
测试时间
爆轰驱动
膨胀管
轨道速度
高超声速流动
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Summary:The hypersonic flow at orbital speeds is a fundamental issue for the ground tests of aerospace crafts. The detonation-driven high-enthalpy expansion tube （JF16 expansion tube） was developed to investigate re-entry physics. A forward detonation cavity （FDC） driver was applied in the JF16 expansion tube to create stable driving flows. The sound speed ratio of the detonated to test gas was examined to minimize the magnitude of test flow perturbations. The acceleration section length, incident shock decay and diaphragms thickness were investigated in detail to obtain optimal operation parameters. Flow visualization was also carried out with schlieren system to demonstrate the test flow stability and the effective test duration. Experimental data showed that the test flow with a velocity of 8.3 km/S and a total enthalpy up to 40 MJ/kg can be generated successfully and the test duration lasts for more than 50μs.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-014-5756-1