Effects of Gas/Liquid Coazial Swirl Atomizer Configuration on its Performances

摘要：

A numerical study on gas-liquid flow inside a gas/liquid coaxial swirl atomizer has been conducted for the purpose of investigating the effects of atomizer geometries on its performance. A computational model for internal flow field of the atomizer was established by making use of a fractional volume of fluid (VOF) variable to describe the distribution of the liquid phase in the flow field. Numerical simulations were carried out correspondingly to different atomizer geometries to obtain insight of how injector configuration parameters affect film velocity, spray angle, and pressure drop. The results show that increase of the diameter of the inner atomizer results in the increase of liquid film axial velocity, increase of pressure drop, decrease of annular velocity and the spray angle. The axial location of tangent inlet holes also has influences on the pressure drop, spray angle and film velocity. The recess of the inner atomizer hardly influences the film velocity and the spray angle. But it may cause separation of the liquid film. The calculated spray angle of a cylindrical swirl atomizer agrees well with the experimental measurement, which shows the validity of the computational model and the algorithm.

关键词： Gas/Liquid Coazial Swirl Atomizer Numerical Simulation Performances of Atomizer Gas/Liquid Interface Atomizer Configuration Spray Angle Pressure Drop

作者: Zhou Lixin Zhang Huiqiang Lei Fanpei Ge Lihu Chen Jianhua

作者单位: Xian Aerospace Propulsion Institute Xian 710100,China Coll.of Astronautics and Aeronautics,Tsinghua University Beijing 100084,China

会议类型: 国际会议

会议名称: The 11th International Space Conference of Pacific-basin Societies(第11届环太平洋国际航天会议)

会议地点: 北京

会议语种:英文

页码: 592-600

在线出版日期: 2007-05-16（万方平台首次上网日期，不代表论文的发表时间）