【摘要】 <正> 一、引言 在高温涡轮叶片尾部的冷却结构中,最有效的方法就是利用冷却空气通过带扰流柱的弦向通道对尾部进行直接强化冷却.由于该通道具有带扰流柱和多出口的特点,使得这种冷却通道的流动与换热问题的研究十分复杂,除了文献[1,2]外,迄今还没有有关的研究报告发表.在文献[1,2]中介绍了放大5倍模拟实验件的流量分配实验和换热实验结果.这些研究表明通道内的扰流柱对空气的换热有很大的增强,沿叶高的更多还原

【Abstract】 The water flow in an experimental model, a pin-finned passage with 8 outlest, is visualized by injecting dye at several defferent points in order to investigate the flow and heat transfer characteristics in a cooling passage of gas turbine blade trailing edge. The turbulent flow and heat transfer inside the model passage are simulated by using the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) numerical method and two-equation turbulence model, so that the cooling performance of gas turbine blade trailing edge may be predicted. The flow is assumed to be two dimensional and incompressible, however, the drag of the wall to air and the heat transfer between the wall and cooling air have been taken into account. The results of computation including velocity vectors, air and wall temperature distributions are in good, agreement with previous experimental results.更多还原