燃烧室与涡轮气动性能全3维联合数值仿真

Full-3D Joint Numerical Simulation of Aerodynamic Performance in Combustor and Turbine

针对燃烧室与涡轮2大部件相互耦合关系下多物理场的精准辨析问题,开展了基于CFX统一软件平台的部件间气动性能全3维联合数值仿真研究。选取地面起飞状态点作为数值仿真工况,采用化学热力学建表方法计算化学反应过程,通过源项法模拟叶片冷却喷射。根据计算结果分析了2大部件相互耦合关系下多物理场的分布规律,结果表明:各流场参数分布趋势合理,验证了部件间全3维联合数值仿真的可行性, 与部件单独仿真结果进行了对比,结果表明:部件联合仿真与单独仿真获取的压力和马赫数的演化规律基本一致,温度场分布表现出差异,联合仿真克服了部件单独仿真无法准确捕捉热斑的不足。部件联合仿真为多部件耦合关系下气动性能匹配和优化设计提供了工程可用的3维分析手段。

Aiming at the calculation and analysis of multiple physical fields under the coupling relationship between combustor and tur-bine,the full-3 D joint numerical simulation of aerodynamic performance between components was carried out based on CFX unified software platform.The ground take-off point was selected as the numerical simulation condition.the chemical reaction process was calculated by the table building method of chemical thermodynamics,and the blade cooling injection was simulated by the source term method.According to the calculation results,the distribution of multiple physical fields in the coupling relationship between the two components was analyzed.The results show that the distribution trend of flow field parameters is reasonable,which verifies the feasibility of full-3 D joint numerical simulation between components.Compared with individual simulation results,the results show that the evolution regularity of pressure and Mach number obtained by the full-3 D joint numerical simulation and individual simulation is basically the same,and the distribution of temperature field is different.The joint simulation overcomes the shortcoming that the component individual simulation can not accurately capture the hot spot.The component joint numerical simulation provides a 3 D analysis method for aerodynamic performance matching and optimization design under multi component coupling relationship.