数值模拟在整铸涡轮精密成形中的应用现状

随着计算方法和铸造工艺的发展,数值模拟技术在铸造领域中得到了广泛应用.涡轮作为发动机上的重要热端部件,其结构伴随着发动机的更新换代,向着精密化、轻量化、薄壁化方向发展,数值模拟技术也成为铸造工作者控制涡轮质量的重要手段.目前相关学者通过铸造模拟软件对涡轮精密成形的充型过程与宏观物理场结果进行分析,依据模拟结果来改善铸造...

Application Status of Numerical Simulation in Precision Forming of Block Casting Turbine

With the development of calculation methods and casting technology, numerical simulation technology has been widely used in casting field. As an important hot-end component of the engine, turbine is developing towards precision, lightweight and thin-walled in terms of structure with the upgrading of the engine. Numerical simulation technology also becomes an important means for foundry workers to control turbine quality. At present, relevant scholars use casting simulation software to analyze the filling process of turbine precision forming and macroscopic physical field results, and improve the casting process based on the simulation results, thereby improving the quality of turbines. In this paper, the application status of numerical simulation technology in the research of precision forming of casting turbine was reviewed. To improve the simulation efficiency, the precautions in geometric modeling, meshing and other pre-processing processes were introduced in detail, and the effects of the simulation results of turbine casting filling process, temperature field and stress field on defect prediction and process optimization were also analyzed. The development direction of the microstructure simulation of the cast turbine and the problems that needs to be solved in the further development of the numerical simulation of turbine castings were pointed out.