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축류형 송풍기의 성능 및 소음 예측을 위한 전산 프로그램의 개발 및 적용
정동규,홍순성,이찬,Chung, Dong-Gyu,Hong, Soon-Seong,Lee, Chan 한국유체기계학회 2000 한국유체기계학회 논문집 Vol.3 No.3
A computer program is developed for the prediction of the aerodynamic performance and the noise characteristics in the basic design step of axial flow fan. The flow field and the performance of fan are analyzed by using the streamline curvature computing scheme with total pressure loss and flow deviation models. Fan noise is assumed to be generated due to the pressure fluctuations induced by wake vortices of fan blades and to radiate via dipole distribution. The vortex-induced fluctuating pressure on blade surface is calculated by combining thin airfoil theory and the predicted flow field data. The predicted performances, sound pressure level and noise directivity patterns of fan by the present method are favorably compared with the test data of actual fan. Furthermore, the present method is shown to be very useful in optimizing design variables of fan with high efficiency and low noise level.
축류형 송풍기 설계 과정에서 공력 - 음향학적 성능 예측을 위한 전산 프로그램의 개발
정동규(Dong-Kyu Chung),홍순성(Soon-Seong Hong),이찬(Chan Lee) 한국유체기계학회 2000 유체기계 연구개발 발표회 논문집 Vol.- No.-
Developed is a computer program for the prediction of the aero-acoustic performance characteristics such as discharge pressure, efficiency, power and noise level in the basic design step of axial flow fan. The flow field and the aerodynamic performance of fan are analyzed by using the streamline curvature computing scheme with total pressure loss and flow deviation models. Fan noise is assumed to be generated due to the pressure fluctuations induced by wake vortices of fan blades and to radiate via dipole distribution. The vortex-induced fluctuating pressure on blade surface is calculated by combining thin airfoil theory and the predicted flow field data. The predicted aerodynamic performances, sound pressure level and noise directivity patterns of fan by the present computer program are favorably compared with the test data of actual fan. Furthermore, the present computer program is shown to be very useful in optimizing design variables of fan with high efficiency and low noise level and in analyzing their design sensitivities.