Attenuation of incident shock waves in free piston shock tunnels

被引:0
|
作者
Zhu H. [1 ]
Jiang H. [1 ]
Zhang B. [1 ]
机构
[1] China Academy of Aerospace Aerodynamics, Beijing
来源
Zhu, Hao (13439821690@163.com) | 1600年 / Chinese Society of Astronautics卷 / 38期
基金
中国国家自然科学基金;
关键词
Attenuation; Compression tube; Free piston shock tunnel; Incident shock wave; Safe velocity;
D O I
10.7527/S1000-6893.2017.121328
中图分类号
学科分类号
摘要
Attenuation of incident shock waves in free piston shock tunnels is of great important, which not only reduces the enthalpy, pressure and steadiness, but also imposes constraints on valid testing time. In this study, an attempt of investigation of main reasons of attenuation of shock wave was carried out based on the structural features of free piston tunnels. After neglecting some random factors, two important factors of attenuation, viscosity of the boundary layer and the reflected expansion wave, were studied. The results show that the latter factor plays major role in free piston shock tunnels. When the main diaphragm ruptures, the front face of the piston is very close to the main diaphragm, which leads to reflected expansion wave to catch up with the interface or shock wave earlier. A new compression tube with an abrupt area change was proposed, which can delay the interaction between the reflected expansion wave and the interface (or shock wave). In the new compression tube, the steady pressure and temperature of driver gas could be formed in the end of the tube while the free piston decelerated to a safety speed. © 2017, Press of Chinese Journal of Aeronautics. All right reserved.
引用
收藏
相关论文
共 20 条
  • [1] Gai S.L., Free piston shock tunnels: Developments and capabilities, Progress in Aerospace Sciences, 29, 1, pp. 1-41, (1992)
  • [2] Stalker R.J., A study of the free piston shock tunnel, AIAA Journal, 5, 12, pp. 2160-2165, (1967)
  • [3] Stalker R.J., Shock tunnel for real gas hypersonic: AGARD-CP-428, (1987)
  • [4] Stalker R.J., Modern developments in hypersonic wind tunnels, Aeronautical Journal, 110, 1103, pp. 21-39, (2006)
  • [5] Stalker R.J., Morgan R.G., The University of Queensland free piston shock tunnel T-4: Initial operation and preliminary calibration, 4th National Space Engineering Symposium, pp. 182-198, (1988)
  • [6] Hornung H., Performance data of the new free-piston shock tunnel at GALCIT: AIAA-1992-3943, (1992)
  • [7] Eitelber G., Mcintyre T.J., Beck W.H., Et al., The high enthalpy shock tunnel in Göttingen: AIAA-1992-3942, (1992)
  • [8] Eitelberg G., First results of calibration and use of HEG: AIAA-1994-2525, (1994)
  • [9] Itoh K., Characteristics of the HIEST and its applicability for hypersonic aerothermodynamic and scramjet research, Advanced Hypersonic Test Facilities, pp. 239-253, (2002)
  • [10] Mirels H., Attenuation in a shock tube due to unsteady-boundary-layer action: NACA TN 3278, (1956)