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6 - Theory and Methods for Long-Test-Duration Shock Tunnels

Published online by Cambridge University Press:  12 October 2023

Zonglin Jiang  and
Randy S. M. Chue
Zonglin Jiang
Affiliation:
Chinese Academy of Sciences, Beijing
Randy S. M. Chue
Affiliation:
Nanyang Technological University, Singapore
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Summary

Based on detonation-driven shock tunnels, key issues that play important roles in extending the test time are introduced in this chapter, and the corresponding solutions are proposed, evaluated, and discussed in detail, including the tailored-interface condition, the shock–boundary-layer interaction at the end of the driven section, and the precursor shock damping in the vacuum tank. The research work on these issues was carried out to find out the flow physics and application methods to improve the high-enthalpy shock tunnel for meeting the test time requirement for supersonic combustion and scramjet engine experiments. With application of the aforementioned theories and methods to the high-enthalpy shock tunnel, a large-scale detonation-driven hypersonic flight-duplicated shock tunnel (the JF-12 shock tunnel) was successfully developed, which can provide test times of more than 100 microseconds and is capable of duplicating hypersonic flight conditions for Mach numbers of 5–9 at altitudes of 25–50 km.

Keywords

detonation-driventest timehypersonic flight conditionduplicationtailored interface
Type
Chapter
Information
Theories and Technologies of Hypervelocity Shock Tunnels , pp. 165 - 191
Publisher: Cambridge University Press
Print publication year: 2023

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