Rapid Loading 계산을 이용한 압축기 임펠러 소음 예측

초록

In this research, we developed a computer program that designs a centrifugal impeller and diffuser, and predicts the far-field noise from the impeller. To design the impeller optimally, the TEIS model, which was originally developed by Japikse(1985), and the mean line analysis are combined to predict the performance and design the optimal impeller simulataneously. The geometric configurations are provided by a GUI software(iDesignComp). The noise from impeller can be computed by the rapid loading procedure, which generates a surface bewteen two blades and calculates the pressure distributions on the suction and pressure sides. The steady loading noise is computed by the rotating dipole source distribution via Ffowcs-Williams & Hawkings equation.