壁面局部振动的二维管可压缩流动分析

Analysis of Compressible Flow in the Two-Dimensional Local Vibrating Tube

本文通过求解二维雷诺时均Navier-Stokes方程,对壁面局部振动的二维管内流场进行可压缩流体的数值模拟,分析振动频率、振幅及相位对流场的影响。研究表明:振动频率上升,可使静压变化区域缩小,同时静压变化幅度增加;振幅变化不影响静压变化范围,仅作用于静压变化幅度;振动相位变化,局部振动壁面向管内输入能量,生成交替的高低压圈。此研究结果为进一步模拟燃气轮机叶片振动对气膜冷却的影响提供参考。

By solving the two-dimensional RANS equation,numerical simulation of compressible fluid flow in the two-dimensional local vibrating tube is presented,to analyze the effects of vibration frequency,amplitude and phase of the flow field.Research shows that：the increase of vibration frequency can make the pressure changing region reduced and increase the static pressure variation amplitude;the changes of vibration amplitude do not affect the pressure change range.It only affectsthe static pressure variation amplitude：when vibration phase is changed,local vibration inputs energy to the fluid and generates alternating high and low pressure ring.The results of this study provide a reference for the further simulation of the effect on film cooling in vibrating-blade gas turbine.