摘要
采用NavierStokes方程对微型缩放喷管内的亚声速流动进行二维数值模拟,重点考察滑移边界条件对计算结果的影响.通过比较有与无滑移边界条件的数值结果,发现微喷管内努森数处于0.014～0.023时,滑移边界条件对微喷管推力的影响不大,但对微喷管扩张段的流场则有较大影响.
The 2-D subsonic flow inside the converging-diverging micronozzle is simulated using Navier-Stokes equation incorporated with a slip boundary condition. A reasonable result is obtained which is then compared to that of the no-slip boundary condition. The comparison shows, that when the Knudson number is in the range of 0. 014 - 0. 023, there is little influence on the prediction of the microthrust with different boundary condition, while the values of the variables in the diverging part of the micronozzle change obviously.
基金
国家自然科学基金(10372099
50206021)资助项目.
关键词
微喷管
滑移边界
数值模拟
micronozzle
slip boundary condition
numerical simulation
