Simulation Research on Liquid Sheet Formed by Jet Impingement Using SPH
Like-on-like impinging jet injector is widely used in liquid propellant rock engines for its simple structure and high atomization efficiency. When sprayed from the injectors, propellant jets will impinge and form a fan shaped and unsteady liquid sheet, then the liquid sheet will break up into ligaments and drops. The formation of liquid sheet is the first step of atomization, which directly determines the size and distribution of the propellant drops and influences the combustion efficiency greatly. When traditional mesh methods are used in the simulation of jet impingement, the mesh number needed will reach 106, and simulation must rely on mesh refinement and precise boundary detection, they all lead to a complex computational process and low computational efficiency. As a truly Lagrange particle method, SPH has great advantages on problems of free surface, moving boundary, great deformation, et al. over the traditional mesh methods. Thus, this paper made an attempt to simulate jet impingement using SPH. Viscosity and surface tension were included in our simulation. The surface tension algorithm based on CSF (Continuum Surface Force) model was revised using a new corrective SPH method proposed by Stranex et al.. A simplified jet impingement model was used, which did not include the influences of the air and jet injectors and used water as the simulation liquid of propellant. The total particle number was kept at about 105, liquid sheet images of different impinging velocities and angles have been obtained. Simulation results were consistent with the experiment ones, but there were also many problems, which called for further work.
QIANG Hongfu LIU Hu CHEN Fuzhen HAN Yawei
No.201 Xi an High Technology Institute,Xi an 710025,China
国际会议
2011 International Autumn Seminar on Propellants,Explosives and Pyrotechnics(2011国际推进剂、炸药、烟火技术秋季研讨会)
南京
英文
884-889
2011-09-20（万方平台首次上网日期，不代表论文的发表时间）