涡流器排对附面层热传输的影响

The Effect of an Array of Vortex Generators on Heat Transfer in the Boundary Layer

本文对平板附面层在有和没有涡流器(“净型”)情况下的传热性能进行了试验研究。测量了两种情况下的附面层速度分布和温度分布。结果表明,在涡流器排的近下游,传热性能有很大提高,附面层的速度分布有很大改变,壁面处的速度梯度大大增加,而温度梯度大大减少,原因是旋涡发生器产生的流向涡与附面层的相互作用。

An experimental investigation is conducted to evaluate the heat transfer performance with and without Vortex Generators(V. Gs. )on a plat plate. Comparison of the Velocity and the temperature profiles in B. L. under both conditions is made. Results show that heat transfer near the downstream of V. Gs. is significantly enhanced, the Velocity profile in B. L. greatly changed, the velocity gradient near the wall much increased and the temperature gradient remarkably decreased, Which is due to the interaction between the longitudinal Vortex produced by the V. Gs. and B. L..