作者：Xin; Li; Jia; Yu; Lu-cheng; Jioptimizationadjointmethodcentrifugalcompressorkrainimpellerentropygenerationrateisentropicefficiency
摘要：Centrifugal compressors can realize a high pressure ratio within a relatively small spatial space,therefore largely used in aviation impeller machinery.Pursuing less size and weight while no penalty of efficiency and aerodynamic loading is the development trend,while both the complex geometry and tough flow conditions bring challenges on the flow calculation and aerodynamic shape optimization.Considering the Adjoint method is an efficient local optimization algorithm,this paper uses the continuous Adjoint method to optimize the geometry of a modified Krain impeller.The results show that the isentropic efficient is improved 0.53%point at near peak-efficiency operating condition,while the mass flow rate and total pressure ratio keep relatively constant.Besides,the whole characteristic line shows a positive improvement,indicating the significance of theAdjoint optimization method.
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