面向气热耦合的涡轮叶片计算域模型建模方法

针对冷却结构复杂的涡轮叶片在气热耦合数值模拟中计算域模型建模效率低、模型质量不稳定以及对数值模拟适应性差等问题，分析面向制造的涡轮叶片模型及建模方法，结合气热耦合数值模拟对涡轮叶片数值模拟的实际需求，提出一种面向气热耦合的涡轮叶片计算域建模方法。通过外型冷却特征自动定位生成算法，创建涡轮叶片冷气域部分；通过自适应管道求交算法、边界自动匹配算法，创建能够适应不同叶型的涡轮叶片燃气域部分；此外，在创建流体域的过程中提取气热耦合数值模拟所需的关键几何特征及非几何信息，并与冷气域、燃气域、叶片实体集成，完成气热耦合计算域模型的生成。基于以上研究开发涡轮叶片气热耦合计算域模型快速建模系统，验证所提方法的有效性。 

A conjugated heat transfer oriented modeling method of turbine blade computational domain model

To solve the problems of low modeling efficiency, unstable model quality and poor adaptability to numerical simulation in conjugated heat transfer numerical simulation of turbine blades with complex cooling structure, the turbine blade model for manufacturing and its modeling method were analyzed. Combined with demands for numerical simulation, a conjugated heat transfer modeling method for the turbine blades' computational domain was proposed. Firstly, an automatic positioning algorithm based on the external cooling feature was used to create the turbine blade's cooling air fluid domain. Through the adaptive pipeline intersection algorithm and the boundary automatic matching algorithm, the gas fluid domain that can adapt to different blade section line types was generated. During the modeling process, the key geometric features and non-geometric information required for the numerical simulation were extracted, and then were integrated with the cooling air fluid domain, the gas fluid domain and blade entity. The conjugated heat transfer computational domain model was completed. Based on the above research, a rapid modeling system was developed for modeling conjugated heat transfer computational domain model, which verified the effectiveness of the proposed method.