实验流体力学2025，Vol.39Issue(1)：38-44,7.DOI:10.11729/syltlx20230113
脉冲喷注对超燃冲压发动机煤油燃料混合及燃烧性能的影响
Numerical simulation of mixing and combustion performance of pulsed injection in a kerosene-fueled scramjet
摘要
Abstract
To investigate the impact of gaseous kerosene on the mixing and combustion performance of a scramjet combustor with pulsed injection,the two-dimensional RANS equations are solved using the two-equation k-ω SST turbulence model.The flow field structure of the scramjet model with the cavity and backward step as the flame stabilizer under the condition of Mach 2.5 inflow,total pressure of 1.75 MPa,and total temperature of 1 350 K is investigated.The mixing and combustion performance of kerosene and air under steady injection and pulsed injection are compared and analyzed.The results show that the simulated schlieren pattern is in good agreement with the test,only 0.2 ms earlier than the test,accounting for 2.89%of an oscillation period(6.9 ms).Pulsed injection results in a prolonged existence of the recirculation zone within the combustion chamber cavity,enhancing fuel retention in this region.It is not found that the pulsed injection has a significant contribution to the total pressure loss,while the temperature and pressure distribution of the pulsed injection is uniform without the thermo-dynamic throat.关键词
超燃冲压发动机/气态煤油/二维雷诺平均/脉冲喷注/数值模拟/燃烧性能/定常喷注Key words
scramjet/gaseous kerosene/two-dimensional RANS/pulsed injection/numerical simulation/combustion performance/steady injection分类
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刘国雄,李朗,贾彬..脉冲喷注对超燃冲压发动机煤油燃料混合及燃烧性能的影响[J].实验流体力学,2025,39(1):38-44,7.基金项目
国防科工局实验室稳定支持项目(WDZC6142703202205) （WDZC6142703202205）
空天飞行空气动力科学与技术全国重点实验室资助项目(SKLA-2022-KFKT001) （SKLA-2022-KFKT001）
