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论文类型：期刊论文

发表时间：2017-05-04

发表刊物：INVERSE PROBLEMS IN SCIENCE AND ENGINEERING

收录刊物：SCIE、EI

卷号：25

期号：5

页面范围：633-651

ISSN号：1741-5977

关键字：Inverse method; turbomachinery; design; pressure loading; computational fluid dynamics

摘要：An improved inverse method for turbomachinery design is developed in this paper. A strict 'no-slip' boundary condition is imposed during the flow time marching process, and a virtual movement velocity is computed based on characteristics boundary conditions according to the difference of specified and calculated pressure loading, then the camber line of the blade is moved accordingly. A new 'inverse' time step calculation method is proposed to make the value of the 'inverse' time step case-independent, and a coupled non-uniform rational B-spline (NURBS) smoothing technique is used to improve the robustness of the solver, also guarantee the manufacturability of the obtained blade. Two-dimensional test cases, including compressor and turbine cascades, are adopted to validate the method. Then, the method is extended to three dimensions, and a high-loaded rotor of a fan stage is redesigned by the method in a stage environment. The final results indicate a fairly large performance gain, which demonstrates the effectiveness of the improved method.