JF-16膨胀管流场分析及升级改造

doi:10.7527/S1000-6893.2016.0030

Abstract

Abstract:

An expansion tube/tunnel is a ground-based test facility to generate hypervelocity test flow for the study of reentry physics. A detonation-driven expansion tube (JF-16) has been built at State Key Laboratory of High-temperature Gas Dynamics to generate relatively steady and clean test flow with high enthalpy. Numerical simulation is presented as an indirect approach to diagnose the key flow field features of JF-16. It indicates that real gas effect can enhance the compression capability of the shock wave and influence its structure. What is more, the temperature and chemical composition of the test flow in acceleration tube differ from the real flight condition. As a result, to upgrade the JF-16 facility, a conical nozzle has been designed at the end of acceleration tube. The main purpose of the nozzle is to adjust the temperature of the test flow by utilizing steady expansion process and improve its quality. Meanwhile the available test core size can be increased to accommodate large-scale models. Numerical simulation results show that 8° is the optimum angle of nozzle and the test core size can be expanded to 140 mm.

Key words: expansion tube, hypervelocity, numerical simulation, flow field features, conical nozzle

CLC Number:

V211.751

ZHOU Kai, YUAN Chaokai, HU Zongmin, JIANG Zonglin. Flow field analysis of JF-16 expansion tube and its upgrade[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(11): 3296-3303.

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Flow field analysis of JF-16 expansion tube and its upgrade

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