颗粒对小突片喷口湍射流调制的研究

燕小芬; 王兵; 王希麟

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颗粒对小突片喷口湍射流调制的研究
燕小芬¹, 王兵², 王希麟³
1.清华大学航天航空学院北京100084;2.清华大学航天航空学院北京100085;3.清华大学航天航空学院北京100086

摘要:

为了探讨小突片喷口的两相湍射流中颗粒对气相场的影响,采用三维颗粒动态分析仪PDPA测量了气相湍流度的分布,证实了小突片对单相湍射流的强化混合作用。进一步的测量结果表明,在安装小突片喷口的射流中,大小粒径不同的颗粒对气相湍流的调制作用与圆喷口射流中相反。研究表明,当小突片和颗粒多种因素共同作用于湍射流时,最后的效果不等于每种因素单独作用效果的简单叠加。

关键词: 气固两相流+ 射流小突片+ 湍流度 PDPA+

DOI：

分类号:V231

基金项目:

Turbulence modulation of particles in a tabbed-jet

YAN Xiao-fen¹, WANG Bing², WANG Xi-lin³

1.School of Aerospace,Tsinghua Univ.,Beijing 100084,China;2.School of Aerospace,Tsinghua Univ.,Beijing 100085,China;3.School of Aerospace,Tsinghua Univ.,Beijing 100086,China

Abstract:

In order to discuss the effect of particles on modulating the gas-phase in a jet with two tabs fixed on nozzle,the gas-phase turbulence intensity was measured using Phase Doppler Particle Analyzer(PDPA) equipment..The enhancement mixing effect of tabs is validated.Results show that the modulation by different diameter particles in the tabbed-jet is reversed to the round jet.When several factors of particles and tabs influence the turbulent jet simultaneously,the final effect is not simply the addition of all individual effect.

Key words: Gas-solid flow+ Jet flow Small tabs+ Turbulence PDPA+