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손미소(M. S. Son),박수형(S. H. Park) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.5
Unsteady RANS computation was conducted to investigate vortical flow over the ONERA 70-degree delta wing at a high angle of attack. Using k-w shear-stress transport(SST) and Spalart-Allmaras(SA) turbulence model, a comparative study is presented with experimental data on the same grid and computation condition. SA model predicts well the pressure coefficient distribution. whereas the axial velocity and vorticity variation along the vortex core are not well predicted with the SA model.
자동차용 냉매 압축기의 FSI(Fluid-Structure Interaction) 해석
손일국(I.G. Son),배성민(S.M. Pae),김광일(K.I. Kim),윤영섭(Y.S. Yoon) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
One of the most effective key factors to improve performance of automotive reciprocating compressor is the design of suction and discharge reed valves. Reed valves are also the major sources of compressor noise. Valve motion is highly coupled with refrigerant flow. In this study, a process of fluid-structure interaction analysis was developed to predict the cylinder inner flow and the dynamic behavior of valve simultaneously. Interface programs were developed for transformation and mapping of data between computational fluid dynamics code and computational structural dynamics code. The full cycle simulations of compressor were performed using FSI analysis. The process of FSI analysis was validated by comparing the simulation results with the experimental results.