Numerical simulation of flow in swirl injector for power-law fluid

作     者：WANG Feng FU Qing-fei YANG Li-jun 

作者机构：School of AstronauticsNorthwestern Polytechnical UniversityXi'an 710072China School of AstronauticsBeijing University of Aeronautics and AstronauticsBeijing 100191China 

出 版 物：《航空动力学报》 (Journal of Aerospace Power)

年 卷 期：2012年第27卷第4期

页      面：890-899页

核心收录：

学科分类：080703[工学-动力机械及工程] 082502[工学-航空宇航推进理论与工程] 08[工学] 0807[工学-动力工程及工程热物理] 0825[工学-航空宇航科学与技术] 

基　　金：Beijing Natural Science Foundation(Support number:8112026) 

主　　题：numerical simulation gelled propellants power-law fluid swirl injector inner flow 

摘      要：In order to investigate the flow characteristics of swirl injectors for gelled propellants,which actually behaved as non-Newtonian power-law fluid,a swirl axisymmetric model was established to solve Navier-Stokes equations and VOF(volume of fluid) equation,and the power-law constitutive equation was used to describe the rheology characteristics of the gelled *** film thickness and velocity distribution in the swirl injector under different flow conditions were studied *** simulation results show that the increased geometry characteristic parameter of the swirl injector contributes to the decrease of liquid film *** liquid film thickness is almost independent of the pressure *** rheologic parameters have great influences on the inner flow of swirl injector: by increasing the fluid consistency index K and power index n,both the axial and the swirl velocities decrease dramatically;higher fluid consistency index K and power index n make the liquid film thickness *** the viscosity is large enough,the air core in the injector would vanish.