Improvement of the Structural Soundness of a Small-Sized Turbocharger Using Fluid-Structural Interaction Analysis

유체-구조 연성해석 기법을 이용한 소형 터보차저 건전성 향상 연구

A small-sized turbocharger is generally used in downsizing engine for various vehicles. When a centrifugal compressor, which is one of the crucial units of the turbocharger, is downsized, the compressor has much more possibilities of being damaged because of its high rotating speed, causing insecure structural soundness. Thus, it is of essential to study on the improvement of the structural soundness of a small-sized turbocharger. In this study, numerical analysis on the various blade geometries and mass flow rate of the compressor was performed using the commercial software ANSYS CFX. In addition, the evaluation on the structural soundness of a compressor impeller for respective cases was conducted using ANSYS Mechanical. As a result, it was shown that the compressor had higher efficiency with increasingly secured structural soundness.