型面旋转变马赫数风洞喷管的优化设计

doi:10.7527/S1000-6893.2013.0478

Abstract

Abstract:

The study of variable Mach number wind tunnel nozzle with good performance and easy adjustment, which can generate fast response on the exit Mach number by rotating the tunnel profile, is now a focus of research. In this paper, corresponding to the wind tunnel nozzle with exit Mach numbers varying from 2.0 to 4.0, an optimization design platform based on the iSIGHT and Fluent softwares is built to find out the effect of the design factors on the exit flowfield, including the design Mach number, initial expansion line, boundary layer correction, etc. In order to obtain the best baseline profile, the NSGAⅡ algorithm is used to research the Kriging model approximation constructed based on the experimental design points. Then, 2D and 3D numerical simulations are implemented to verify the baseline profile's performance. It is shown that, uniformity of the exit flowfield with Mach numbers varying from 2.0 to 4.0 by rotating the baseline profile can satisfy the requirements of the Military Standard of China (GJB-1179-91) for the wind tunnel nozzle,which is originally set for the Mach number uniformity at the exit of the wind tunnel nozzle designed on the single design point with a fixed profile. The present work has laid a solid foundation for the application of the variable Mach number wind tunnel in future.

Key words: wind tunnel, nozzle, variable Mach number, rotating profile, optimization design, numerical simulation

CLC Number:

V231.3

FAN Zhipeng, XU Jinglei, LYU Zheng, MO Jianwei. Optimization Design of Variable Mach Number Wind Tunnel Nozzle by Rotating Profile[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(5): 1216-1225.

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Optimization Design of Variable Mach Number Wind Tunnel Nozzle by Rotating Profile

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