Abstract: Coupling-Looseness Multidisciplinary Design Optimization of centrifugal compressor is presented in order to improve optimization efficiency. Fluent-Thermal-Solid coupling system is obtained with Loose-Coupling method. The Coupling-Looseness optimization method by multi-stage optimization strategy is studied to reduce computing time, which avoids iteration of Fluent-Thermal-Solid coupling system. In aerodynamic optimization stage, the optimization is obtained by global arithmetic in whole design space. Coupling and collision among subjects are considered in coupling design stage, which is driven by local arithmetic to gain the final design. The design cycle is reduced by multi-stage optimization with different complexity model.

Key words: Centrifugal compressor; Fluent-thermal-solid coupling; Coupling information transfer; Variable complexity optimization; Coupling-looseness technology

摘要： 为提高多学科设计优化的寻优效率,以离心式压气机为对象,开展了耦合松弛多学科设计优化方法的研究。针对松散耦合方法建立的离心式压气机的流-热-固耦合分析模型,为了避免反复迭代导致的分析、优化时间过长,构建了分层次的离心式压气机耦合松弛优化设计系统。在气动优化中采用全局寻优算法探索系统最优气动设计方案；在耦合优化阶段,综合考虑学科间耦合及相互作用,在气动优化的基础上局部寻优校验气动优化结果并得到最终设计方案。这种不同复杂层次模型的优化设计有效缩减了系统优化设计周期。

关键词: 离心式压气机;流-热-固耦合;耦合信息传递;变复杂度优化设计;耦合松弛优化设计 