천음속 축류 압축기 동익의 유동장에 대한 난류모델의 성능 비교

초록

A numerical study based on the three-dimensional thin-layer Navier-Stokes solver is carried out to analyze the flowfield through a single stage transonic compressor. Explicit four-step Runge-Kutta scheme with spatially variable time step and implicit residual smoothing is used. The governing equations are discretized with explcit finite difference method. An artificial dissipation model is used to assure the stability of solution. The results with k-ω turbulence model were compared to the results with Baldwin-Lomax model, and physical phenomena of transonic compressor are presented. The two turbulence models give the results that show reasonably good agreements with experimental data.