Design of a continuously variable Mach-number nozzle

作者：Guo Shan guang; Wang Zhen guo; Zhao Yu xin^*

来源：Journal of Central South University, 2015, 22(2): 522-528.

DOI：10.1007/s11771-015-2551-5

• wind tunnel
• variable Mach-number nozzle
• flow quality
• method of characteristics
• numerical validation

A design method was developed to specify the profile of the continuously variable Mach-number nozzle for the supersonic wind tunnel. The controllable contour design technique was applied to obtaining the original nozzle profile, while other Mach-numbers were derived from the transformation of the original profile. A design scheme, covering a Mach-number range of 3.0 < Ma < 4.0, was shown to illustrate the present design technique. To fully validate the present design method, computational fluid dynamics (CFD) analyses were carried out to study the flow quality in the test area of the nozzle. The computed results indicate that exit uniform flow is obtained with 1.19% of the maximal Mach-number deviation at the nozzle exit. The present design method achieves the continuously variable Mach-number flow during a wind tunnel running.

• 出版日期2015-2
• 单位中国人民解放军国防科学技术大学