PERFORMANCE BY WIDTH CONTRACTION IN VANELESS DIFFUSER OF CENTRIFUGAL COMPRESSOR BY COMPUTATIONAL FLUID DYNAMICS

전산해석을 통한 원심압축기용 디퓨저의 폭변화에 따른 성능 연구

This study describes effects of width contraction in vaneless diffuser on the performance of centrifugal compressors using commercial CFD code. Numerical analysis for three different diffusers such as Parallel, half contraction, and full contraction was performed. The results show that the performance of the centrifugal compressor is improved through the use of the diffusers with width parallel in high flow rate. The width contraction of diffusers is influenced static pressure rises. Comparison with the experimental data shows agreement.