论文部分内容阅读
透平的叶片气动、表面温度和传热系数的预测直接影响到叶片寿命、效率的评估,对设计有着极为重要的作用。其中以温度和传热系数的预测最为困难。本文分别采用结构、非结构网格,以及不同的湍流模型对C3X静叶气动分布、绝热表面温度和传热系数的数值预测进行了研究。讨论了不同网格对气动传热预测的影响,以及不同湍流模型在静叶表面绝热壁面温度和传热系数预测上的特点以及原因。
Turbine blade aerodynamic, surface temperature and heat transfer coefficient prediction directly affect the life of the blade, the assessment of efficiency, the design has a very important role. One of the most difficult to predict the temperature and heat transfer coefficient. In this paper, the numerical predictions of the aerodynamic distribution, the adiabatic surface temperature and the heat transfer coefficient of C3X vane are studied by means of structural and unstructured grids and different turbulence models. The influence of different grids on the prediction of aerodynamic heat transfer is discussed, and the characteristics and reasons of different turbulence models on the prediction of adiabatic wall temperature and heat transfer coefficient are discussed.