Experimental Study on the Interactions for Bluff-body and Swirl in Stabilized Flame Process  

作　　者：Bing Ge Shu-Sheng Zang 

机构地区：[1]School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Journal of Thermal Science》2012年第1期88-96,共9页热科学学报（英文版）

基　　金：supported by National Basic Research Program of China (973 Program).No.2007CB210102

摘　　要：This paper focuses on investigating the interaction effects for swirl and bluff-body in stabilized flame process. Particle image velocimetry was used to measure velocity fields in three burners. First, the comparison of flames in bluff-body stabilized burners with and without swirl is presented. The results of the experiments present the variations of bluff-body stabilized flame when swirl is added into burner: the maximum reverse flow velocity and the maximum mean average radial velocity decrease; the maximum radial rootmean squared fluctuating (rms) velocity increases; the values of the axial velocity peak on the side of nozzle axis are lower, and the distance between the peak and centerline is bigger; the location of the maximum radial rms velocity moves to the outlet of annular air-flow from central recirculation zone (CRZ). Then, the comparison of flames in swirl burners with and without bluff-body is provided. The results of the experiments show the changes of swirling flame when bluff-body is added into swirl burner: the air vortex in the CRZ moves to the burner; the peak values of axial mean and rms velocity decrease; the distance between centerline and the mean axial and rms velocity peak increase; the peak of mean radial velocity decreases, and the peak of rms raidial velocity increase. The data from this experiment can also be established as benchmarks for the development and validation of combustion numerical simulations.

关 键 词：Swirl burners BLUFF-BODY turbulent non-premixed flames PIV 

分 类 号：TQ534[化学工程—煤化学工程] TV671[水利工程—水利水电工程]