喷管加装小突片强化射流混合的PIV测量

推进技术 ›› 2004, Vol. 25 ›› Issue (1): 15-18.

喷管加装小突片强化射流混合的PIV测量

左秀娟,黄勇,李永,袁辉靖

北京航空航天大学能源与动力工程学院;北京100083;北京航空航天大学能源与动力工程学院;北京100083;清华大学热能工程系;北京100084;北京大学力学系北京100084

发布日期:2021-08-15
基金资助:
国防科技预研基金资助 (0 0J1 0 5 2HK0 1 )

PIV measurements of the jet flows enhanced by tabs fixed on convergent-divergent (C-D) nozzles

Coll. of Energy and Power Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;Coll. of Energy and Power Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;Dept. of Thermal Engineering, Tsinghua Univ., Beijing 100084, China;Dept. of Mechanics, Peking Univ., Beijing 100084, China

Published:2021-08-15

摘要/Abstract

摘要： 在常温、超声速流动状态下,采用PIV技术定量测量了收敛喷管和收扩喷管加装小突片时射流纵截面的速度场和涡量场,并对其速度场和涡量场进行了比较。结果表明,对于收扩喷管,虽然其速度边界层厚度明显大于收敛喷管,但加装小突片结构也能够明显的强化射流的混合。并且发现,小突片结构不仅能产生流向涡,而且对周向涡有明显的强化作用。

关键词: 小突片+;射流喷管;喷射流混合流;涡流

Abstract: To study the jet mixing enhancement by small tabs, a PIV system was used to conduct two-dimensional measurements of supersonic air jet flows exhausted from a convergent nozzle and two convergent-divergent (C-D) nozzles. The instantaneous quantitative velocity and vorticity fields were obtained to analyze the characteristics of the mixing process in the jet flow. It was found that the tabs fixed on C-D nozzles also enhanced the jet mixing distinctly, although the boundary layers of the jets from C-D nozzles were greater than that from the convergent nozzle. And the tabs intensified the circumferential vortices greatly in addition to the generation of streamwise vortices.

Key words: Small tabs~+;Jet nozzle;Jet mixing flow;Vortex flow

左秀娟,黄勇,李永,袁辉靖. 喷管加装小突片强化射流混合的PIV测量[J]. 推进技术, 2004, 25(1): 15-18.