The optimization of the fluid machinery design parameter

The method of CFD integrated with CAD is presented to optimize fluid machinery design parameter in the paper. Firstly, the parameter to be optimized is determined. Secondly, the CAD technology is applied to build three-dimensional fluid machinery parameterization models by the parameter in its range, which is used to calculate three-dimensional flow field in the fluid machinery model by CFD software. Then, with the evaluation indexes established, the calculation results of the inner flow field in the each parametric model are evaluated by synthesis of Analytic Hierarchy Process and Fuzzy Comprehensive Evaluation. Finally, by comparing the evaluation value of every parametric model, the optimal design parameter of the fluid machinery model is achieved.