双组元离心喷嘴液膜吸合特性数值模拟  

Numerical simulation of liquid film converge characteristics of bipropellant pressure swirl injector

作　　者：吴佳蔓 刘勇[1] 张祥 WU Jiaman;LIU Yong;ZHANG Xiang(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2024年第3期224-230,共7页Journal of Aerospace Power

摘　　要：为研究双组元离心喷嘴液膜的吸合特性,采用流体体积法(VOF)耦合Level Set方法对不同工况下双组元离心喷嘴进行数值计算,分析了喷嘴的流动特性,揭示了内外喷嘴锥形液膜之间的相互影响规律。研究结果表明:当外喷嘴的进出口压差大于1.6 MPa时出现吸合现象,过程表现为内外液膜逐渐重叠、相互吸合;吸合后喷嘴出口下游液雾速度相对减小;推力室室压的增加导致吸合时机缩短,而压差对吸合时机的影响相对较小,随着压差的增加其规律表现为先减小后增加。To study the convergence characteristics of the liquid film of a bipropellant pressureswirl injector,numerical investigation of bipropellant pressure swirl injector was conducted based on the volume of fluid(VOF)coupled Level Set methods under different thruster chamber pressures and pressure drops.The atomization characteristics of the injector were analyzed,and the law of mutual influence between the inner and outer nozzle liquid films was revealed.The results showed that when the pressure drop of outer nozzle was greater than 1.6 MPa,the convergence phenomenon occurred,and the inner and outer spray films were gradually overlapped and converged with each other in the process.After convergence,the downstream speed of the injector outlet relatively decreased.The increase of the thrust chamber pressure led to the shortening of the convergence time,while the influence of the pressure drop on the convergence time was relatively small.With the increase of the pressure drop,the convergence time decreased at first and then increased.

关 键 词：双组元离心喷嘴 吸合特性 吸合时机 CLSVOF方法 两相流 

分 类 号：V43[航空宇航科学与技术—航空宇航推进理论与工程]