涡轮叶片带肋直通道冷却结构参数影响数值模拟

Influencing Numerical Simulation of Cooling Structure Parameters of Ribbed Through Passage of Turbine Blades

采用RANS方法对带肋直通道进行数值模拟计算,分析多种几何参数(肋高、宽高比、肋错列距离)分别对带肋直通道流动和传热特性的影响。结果表明,当肋倾角为60°时,强化换热系数随着肋高的增加整体呈现上升趋势,随着宽高比的增加,综合热效率呈现先增加后下降的趋势,随着肋错列距离的增加,综合热效率呈现逐渐上升的规律,肋错列距离为15 mm时的综合换热性能最优,总体上来看,三种模型的换热效果差别不大。

The study calculates numerical simulation of ribbed straight passage with RANS method,and analyzes the effects of various geometric parameters(rib height,width to height ratio,and rib staggered distance)on the flow and heat transfer characteristics of ribbed straight passage.The results show that when the rib angle is 60°,the enhanced heat transfer coefficient increases with the increase of rib height.With the increase of aspect ratio,the comprehensive thermal efficiency increases first and then decreases.The comprehensive heat transfer performance is the best when the rib staggered distance is 15 mm.In general,the heat transfer effect of the three models is not different.