侧壁有出流孔的通道流场数值模拟

Numerical Investigation of Flow Fields in the Channel with Ejection through the Holes on the Wall

用商业CFD软件(Fluent6.0)对简化后的涡轮叶片冷气通道进行数值模拟,着重研究出流孔上、下游各通道截面内的流动规律。结果表明:出流孔的抽吸作用,使得通道有孔一侧的气流速度相对较高。孔上游通道内的气流,沿主流方向逐渐加速;流经出流孔后,通道内的流速急剧下降,甚至会出现局部低速区。计算结果与实验测量结果符合很好,表明可以利用成熟的CFD商业软件研究该类流动现象。

The commercial software (Fluent 6.0) has been used to simulate the flow behaviors in the cooling channel of turbine blade. Particular attention has been paid to the upstream and downstream regions of the holes. Important aspects of the study include: flow undergoes a strong acceleration and a subsequent rapid deceleration during passing hole. The presence of the holes will reduce mass flux of the channel and even cause a low speed region. The present results show good consistent with the experimental data, so the mature commercial software can be employed to study such complex physical phenomena.