Effects of injection angle and pressure on mixing performance of fuel injection via various geometries for upstream-fuel-injected scramjets

被引:46
作者
Ogawa, Hideaki [1 ]
机构
[1] RMIT Univ, Sch Engn, GPO Box 2476, Melbourne, Vic 3001, Australia
基金
澳大利亚研究理事会;
关键词
Hypersonic airbreathing propulsion; Scramjet engines; Fuel injection; Computational fluid dynamics; TRANSVERSE INJECTION; JETS; PENETRATION; DIAMOND; ARRAY;
D O I
10.1016/j.actaastro.2016.08.008
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Effective fuel injection and mixing is of crucial importance for reliable operation of scramjet engines, where fuel must be injected into high-speed crossflow and mixed with air at an extremely short time scale. This paper presents the results of a numerical study that investigates the effects of the injection angle and pressure for various orifice shapes on fuel mixing characteristics into hypersonic airflow at Mach 5, aiming at the application to scramjet operation with upstream fuel injection at Mach 10. The mixing performance has been evaluated with respect to the mixing efficiency, total pressure recovery, fuel penetration, and streamwise circulation. Significant influence of the injection angle and intensity on the mixing has been observed in conjunction with the geometric features of the injector orifice. An additional performance parameter, namely the mixing vorticity effectiveness, has been found to be an effective measure to quantify the contribution of the streamwise vorticity in mixing enhancement. (C) 2016 IAA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:485 / 498
页数:14
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