基于网格重生成的涡轮叶片变形传递方法

Turbine blade displacement transfer based on mesh regeneration method

在涡轮叶片多学科优化中需要在气动模型和结构模型之间进行耦合信息(气压、温度和变形等数据)传递,来考虑学科耦合的性质.采用修正几何外形和网格重生成的方法实现了叶片结构变形向气动模型传递.传递时在叶片几何模型上增加若干外形控制线,叶片的外形由这些控制线的形状来决定.根据叶片结构变形,调整控制线节点位置坐标,以修改叶片外形控制线的形状,可以实现变形向叶片几何模型的传递.进一步,重新生成气动网格,可以得到结构变形后叶片的气动网格模型.

In multi-disciplinary design optimization （MDO） of turbine blades, the coupling data between aerodynamics and structural mechanics models must be transferred to consider the multi-disciplinary coupling property. A mesh-regeneration method was proposed to transfer displacement in this paper. A group of lines were added on blade surface, and the shape of blades was determined by the shape of these control lines. According to the displacement of blade structure, the position coordinate of the nodes of the lines was adjusted to modify the shape of the blade＇s control lines, thus achieving the displacement transfer towards geometric model of blade. By re-meshing, the CFD mesh of the deformed blade was generated.