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Effects of Lobe Peak-to-Trough Width Ratio on Mixing and Combustion Performance in atr combustors

Transactions of Nanjing University of Aeronautics and Astronautics 2022年第6期39卷 637-650页

作者： ZHAO Qingjun ZHANG Yuankun HU Bin WANG Zhonghao SHI Qiang ZHAO Wei Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190P.R.China School of Aeronautics and Astronautics University of Chinese Academy of SciencesBeijing 100190P.R.China Innovation Academy for Light-Duty Gas Turbine Chinese Academy of SciencesBeijing 100190P.R.China Beijing Key Laboratory of Distributed Combined Cooling Heating and Power System Chinese Academy of SciencesBeijing 100190P.R.China

The air-turbo-rocket(atr)engine is a promising propulsion plant for achieving numerous surface and air launched missile *** application of lobed mixer in the atr combustor can promote the mixing of the fuelrich gas and the air,thus improving the engine performance *** numerical simulation method was conducted to explore the effects of lobe peak-to-trough width ratio on mixing and combustion performance in atr *** show that:For a given peak lobe width b1,the combustion efficiency and total pressure loss decrease with the increase of trough lobe width b2;For a given b2,the combustion efficiency and total pressure loss decrease with the increase of b1;The fan-type lobed mixer with smaller b2has a better effect on promoting the combustion efficiency in the region near the atr combustor center line than that with a pair of parallel side *** total pressure recovery coefficient reaches more than 0.99 at the exit of combustor in nonreactive combustion while the total pressure loss reaches more than 4%in the reacting *** with the mixing process,more than80%of the total pressure loss is caused during combustion.

关键词： atr combustor lobed mixer lobe peak-to-trough width ratio mixing combustion streamwise vortex

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