涡轮叶片流固耦合协作优化方法

针对结构和流场相互影响的流固耦合多学科设计问题,提出一种耦合量曲面拟合的协作优化方法。其特点是用曲面函数拟合结构-流场界面耦合量(温度、气压和变形)的空间分布,并用曲面拟合参数的一致性代替原有耦合量界面分布的学科一致性。涡轮叶片的算例表明:曲面拟合函数可以表征结构和流场界面的耦合量;用拟合参数的一致性代替界面直接耦合是可行的;该协作优化方法是可以用来解决流固耦合多学科优化设计问题的。

Collaborative optimization method for fluid-solid coupling problem of turbine blades

A collaborative optimization(CO) method is proposed for fluid-solid multidisciplinary design optimization(MDO) problems,in which coupling data of interface projected in parametric space is fitted by Bi-cubic B-spline surfaces for transferring between the disciplinary models.The direct coupling of fluid-solid interface is replaced by consistent conditions of the parameters of the Bi-cubic B-spline surfaces,which fitted for each discipline and called load surfaces here.Then,these consistent conditions are integrated in the collaborative optimization system of the fluid-solid problems.An example of turbine blade optimization is provided and the results show: the load surfaces are capable of representing coupling data of interface;the consistent condition of the parameters of load surfaces can replace the direct coupling of interface;the proposed method can be used in fluid-solid coupling problems.