【摘 要】
：
In order to explore the method for reducing aerodynamic noise caused by the cavity structure,the typical cavity model M219 scale model was chosen as the bas
【机 构】
：
KeyLaboratoryofAutomotiveSimulationandControl,JilinUniversity,Changchun,130022,ChinaKeyLaboratoryofA
【出 处】
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The 5th International Conference of Bionic Engineering 第五届国际
论文部分内容阅读
In order to explore the method for reducing aerodynamic noise caused by the cavity structure,the typical cavity model M219 scale model was chosen as the basic model.The maximum noise of the basic model and the flow inside the cavity can be obtained through the numerical simulation.Inspired by the bionic design,selecting the bionic non-smooth structure by the following two ways: one is selecting the known bionic non-smooth structure from the reference literature which has the good effect on the aerodynamic flow field of the bionic non-smooth structure,such as the bionic v-shaped non-smooth structure and the bionics hemispherical structure; The second is using the method of engineering bionics to select the structure that can realize the improvement of the cavity flow field,which is according to the analysis for the cavity inside flow and cavity aerodynamic noise principle,such as triangle structure and arc structure.In order to get the optimized plan for the cavity aerodynamic noise reduction,for the same bionic non-smooth structure,it mainly considers the position of the structure,especially on the front of the cavity and the bottom of the cavity and the after of the cavity.In the study on the location of the process,this paper considered the different between the single factor and multiple factors on aerodynamic noise reduction effect.
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