Design of a continuously variable Mach-number nozzle
来源期刊：中南大学学报(英文版)2015年第2期
论文作者：GUO Shan-guang(郭善广) WANG Zhen-guo(王振国) ZHAO Yu-xin(赵玉新)
文章页码：522 - 528
Key words：wind tunnel; variable Mach-number nozzle; flow quality; method of characteristics; numerical validation
Abstract: 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.
GUO Shan-guang(郭善广), WANG Zhen-guo(王振国), ZHAO Yu-xin(赵玉新)
(Science and Technology on Scramjet Laboratory, National University of Defense Technology,
Changsha 410073, China)
Abstract: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.
Key words:wind tunnel; variable Mach-number nozzle; flow quality; method of characteristics; numerical validation
