Experiment of drag characteristics of a novel variable geometry flame-holder  

作　　者：LIU Yang JIN Jie WANG Hui-ru LIU Yu-ying YANG Mao-lin 

机构地区：[1]School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

出　　处：《航空动力学报》2011年第11期2485-2494,共10页Journal of Aerospace Power

摘　　要：A novel variable geometry flame-holder(VGF) based on V-gutter was presented.The structural characteristics of the flame holder were introduced.Experimental study on drag characteristics of the VGF on un-burning and burning states was conducted in a rectangular combustion test rig.The influence of the change of gutter trailing edge width w on pressure recovery in different operating conditions was analyzed emphatically.Furthermore,drag characteristics in different trailing edge width variation modes were discussed.Results show that:(1) Narrowing w can observably raise the total pressure recovery σ but the highest σ is not obtained at minimum w.(2) The relationship of drag coefficient ψ and w in the un-burning conditions can be well expressed in a form of exponential equation(w/d>0.4).(3) Drag characteristics are not sensitive to the variation modes and speeds of w.(4) In the burning condition,σ decreases with the increasing of w basically and the course can be divided into three stages.The results and experimental data presented in this paper would enhance the phenomenological understanding of this type of VGF,and would contribute to the next experimental study and numerical calculus of this novel VGF.A novel variable geometry flame-holder（VGF） based on V-gutter was presented.The structural characteristics of the flame holder were introduced.Experimental study on drag characteristics of the VGF on un-burning and burning states was conducted in a rectangular combustion test rig.The influence of the change of gutter trailing edge width w on pressure recovery in different operating conditions was analyzed emphatically.Furthermore,drag characteristics in different trailing edge width variation modes were discussed.Results show that：（1） Narrowing w can observably raise the total pressure recovery σ but the highest σ is not obtained at minimum w.（2） The relationship of drag coefficient ψ and w in the un-burning conditions can be well expressed in a form of exponential equation（w/d〉0.4）.（3） Drag characteristics are not sensitive to the variation modes and speeds of w.（4） In the burning condition,σ decreases with the increasing of w basically and the course can be divided into three stages.The results and experimental data presented in this paper would enhance the phenomenological understanding of this type of VGF,and would contribute to the next experimental study and numerical calculus of this novel VGF.

关 键 词：flame-holder variable geometry AFTERBURNER augmentor drag characteristics 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]