Numerical simulation of pulsation impinging jet arrays II (B04)

脉动冲击射流具有比非脉动射流高得多的热传递。额外的热传递来自冲击在板上的涡流系统。该涡流系统被证明与射流的本征模式有关，但在涡轮机叶片的实际情况下，它在横流和曲率下的表现尚不清楚。最重要的是，它不是线性本征模，而不是一个饱和的极限环，这是感兴趣的。我们研究这个极限环和它的感受性，以优化饱和。本文对横流和曲率作用下的多股线阵射流相互作用进行了数值研究。

A pulsating impinging jet has substantially higher heat transfer than a non pulsating jet. The extra heat transfer comes from a vortex system impinging on the plate. This vortex system was shown to be related to the eigenmodes of the jet but it is unclear how it behaves under cross flow and curvature like in the realistic case in the turbine blade. On top of that it is not the linear eigenmode rather than a saturated limit cycle which is of interest. We investigate this limit cycle and its receptivity in order to optimize saturation. The interaction of several jets under cross flow and curvature is investigated numerically for a line array.