基于流体网络法的透平叶片冷却内通道网络模型与分析

采用流体网络法研究分析了某E3发动机高压涡轮动叶的冷却结构,通过合理简化,并选用合适的元件模型,构建了冷却流路的流体网络;对高压涡轮流场进行了三维数值计算,确定了叶片冷却流路流体网络计算所需的边界条件;根据实验关联式,确定损失、传热等相关系数,并根据冷却结构特点自定义了部分特性曲线。将流体网络计算结果与NASA文献中的数据进行了比较,表明本文方法能较好地预测各流路的流量、温度、压力等参数,能够用于叶片冷却结构的性能分析以及叶片冷却结构的初步设计。

Analysis of Turbine Blade Cooling Based on Fluid Network Method

The high pressure（HP） turbine blade cooling configuration of the E^3 aircraft engine was analyzed by using fluid network method. The Quid network was created with proper simplification of the coohng configuration and selection of components models. Flow fields of the HP turbine stage were calculated to get the required data at the numerical boundaries in the fluid network. Loss coefficients and heat transfer coefficients for the components involved were determined through experimental correlations, and characteristic curves customized by the authors. Comparisons between the present results and the data from the NASA report show that the present method can predict the coolant mass flow rates, temperatures and pressure of the network branches very well. This method can be used for the analysis of blade cooling performance and for the preliminary cooling design.