A Study on Integrated Aerodynamic-Ramp-Injector/Gas-Portfire in A Supersonic Combustor: Part One,Numerical Aspects
A computational studyof an integrated aerodynamic-ramp (aeroramp) injector/gas-portfire has been conducted in an ethylene-fueled scramjet combustor, aiming at figuring out the performance of this novel injection and ignition/flame-holding system. The aeroramp injector consisted of two rows of two flush-wall holes, angled downstream and toed in to create vortex and enhance mixing. The gasportfire was located downstream of the injector array. Turbulence was modeled with SST k-w turbulence model, and single step kinetics was used to model ethylene reaction kinetics. Under the simulated conditions: static pressure P0=latm, total temperature T1 =1231K, Ma = 2, the combustor operated in dual-mode combustioa Results showed that the gasportfire integrated with aeroramp injector resulted in better fuel-air distribution, compared to aeroramp injector alone. Wall friction led to most part of the total pressure loss, however, the loss created by aeroramp injector/gas-portfire was a little. Successful combustion was obtained and the combustion efficiency varied in the range of 0. 5 -0.75. The gas-portfire acted as an igniter as well as a flameholder. Comparisons were made with experimental data, and it turned out that they were in good accordance with each other.
aeroramp gas-portfiret igniter flame-holder scramjet
Yan Minglei Wei Baoxi Shi Xinxing Xu Xu
School of Astronautics, Beijing University of Aeronautics and Astronautics,Beijing,100191, China School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing,100191, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
1109-1114
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）