Experiment of drag characteristics of a novel variable geometry flame-holder
Experiment of drag characteristics of a novel variable geometry flame-holder
-
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.Abstract: 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.
-
Key words:
- flame-holder /
- variable geometry /
- afterburner /
- augmentor /
- drag characteristics
-
[1] Jeffery A L,Barry V K,Torence P B,et al.Development needs for advanced afterburner designs .AIAA 2004-4192,2004. [2] Houshang B E.Overview of gas turbine augmentor design,operation,and combustion oscillation .AIAA 2006-4916,2006. [3] Rizk N K,Lefebvre A H.The relationship between flame stability and drag of bluff-body flame-holders[J].Journal of Propulsion and Power,1986,2(4):361-365. [4] GAO Ge,NING Huang.Theoretical and experimental study in stability of the barchan dune vortex flame[J].Journal of Engineering Thermophysics,1982,3(1):89-95. [5] WANG Jiahua,CAO Guomin,BI Qun,et al.Experimental research on the performance of pilot flame-holder with slot on the flat top[J].Journal of Nanjing University of Aeronautics & Astronautics,1986(1):1-10. [6] Yang J T,Tsai G L.Near wake flow of a V-gutter with slit bleed[J].Journal of Fluids Engineering,1993,115(1):13-20. [7] YANG Maolin,QUAN Zhong,BAI Xingyan,et al.Experimental investigation on EBMC flame-holder[J].Journal of Aerospace Power,1998,13(2):74-77. [8] Eugene L,Caleb N C,John T C,et al.Novel carbureted flame holder for improved afterburner stability .AIAA 2008-98,2008. [9] MA Wenjie,YANG Maolin,JIN Jie, et al.Research on combustion performance of the aspirated edge blowing mixture curtain flame-holder .AIAA 2009-5293,2009. [10] Eric C,Rrederic P E,Gerard E A.Variable geometry flame retentiom device for turbomachine after-burner:UK,GB2264554A .1993-01-09. [11] Robert H R,Bruno G L,Jack L R.Element de montage d'aubes:France,FR2522362A1 .1983-02-22. [12] Richard R,Charles T S,Arthur P A.Dispositif de montage d'aube a pas variable:France,FR2312673A1 .1976-05-26. [13] Jean G,Marc F B,Denis J M.Dispositif de reglage de la perte de charge d'au moins un des flux dans un turboreacteur multiflux:Europeen,EP0094296A1 .1983-03-05. [14] Barry K,Kyle G,Amy L,et al.Non-reacting and combusting flow investigation of bluff bodies in cross flow .AIAA 2006-5234,2006. [15] Barry K,Kyle G,James R G,et al.A detailed investigation of bluff body stabilized flames . AIAA 2007-0168,2007. -
点击查看大图
计量
- 文章访问数: 1430
- HTML浏览量: 43
- PDF量: 59
- 被引次数: 0
下载: