Journal:Hangkong Xuebao
Abstract:The study of variable Mach number wind tunnel nozzle with good performance, simple structure and easy adjustment, which can generate fast response on the exit Mach number by rotating the tunnel profile, is now a focus of research and has very good prospects for development. For the profile rotating wind tunnel nozzle with Mach number varying from 2 to 4 obtained by optimization design, 3D numerical simulation and experimental calibration for the flow field of the wind tunnel have been conducted. The size of the real uniform region and the Mach number standard deviation in the condition of different Mach numbers are obtained. Experimental results show that the profile rotating wind tunnel can continuously change the wind tunnel Mach number from 2 to 4, and the uniformity of the flow field is good, which even can meet up the requirement of the National Military Standard of China for a fixed geometry wind tunnel nozzle. The size of the real uniform region is larger than 2/3 of the ideal diamond region under the different Mach conditions. The Mach number standard deviations in the uniform region are less than 0.01 for Mach number 2 to 3, and for Mach number 3.5 is 0.013 6. It is shown that the wind tunnel can realize the continuous variation of Mach number with a good performance. Therefore, it can be used in the future for wind tunnel test. © 2017, Press of Chinese Journal of Aeronautics. All right reserved.
ISSN No.:1000-6893
Translation or Not:no
Date of Publication:2017-01-25
Co-author:Xu Jinglei,范志鹏,莫建伟,唐兰
Correspondence Author:齐伟呈,Xu Jinglei