Experimental Study on Turbulent Structure of Humid Air Flame in a Bluff-body Burner  

作　　者：Bing Ge Shu-Sheng Zang Pei-qing Guo School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 800, Dong Chuan Road, Shanghai, China. Zip: 200240 

出　　处：《Journal of Thermal Science》2009年第2期185-192,共8页热科学学报（英文版）

基　　金：supported by a Grant-in-Aid for Scientific Research through research grant number 2007CB210102 from State Key Fundamental Researeh Program of China.

摘　　要：The main objective of the present experimental study is to analyze the turbulent structure in humid airnon-premixed flame, and determine the effect of humidity on the flow field and the flame stability limit in turbulentnon-premixed flame. Particle Image Velocimetry (PIV) is used to capture the instantaneous appearance ofvortex structures and obtain the quantitative velocity field. The distributions of Reynolds shear stress, mean androot-mean squared fluctuating (rms) velocities are examined to get insight into the effect of fuel-to-air velocity ratioon velocity flow field. The results show that with steam addition, the air-driven vortex in the bluff-body wakeis thinner; the biggest peaks of rms velocity and Reynolds shear stress are lower; the distance between the peaksof rms velocity on the sides of centerline reduces. Besides these, the flame stability is affected. Both central fuelpenetration limit and partially quenching limit reduce with steam addition.

关 键 词：humid air combustion turbulence measurement PIV 

分 类 号：TK124[动力工程及工程热物理—工程热物理]