Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2003.11a
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- Pages.193-198
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- 2003
Large Eddy Simulation of Flow and Heat Transfer in a Rotating Ribbed Channel
요철이 설치된 회전하는 채널 내부의 유동 및 열전달의 큰에디모사
- Published : 2003.11.05
Abstract
A gas turbine blade has an internal cooling passage equipped with ribs, which can be modeled as a ribbed channel. We have studied a flow inside a ribbed channel using large eddy simulaton (LES) with a dynamic subgrid-scale model. The simulation results are compared with the experimental ones. The turbulence intensity and local heat transfer near the rib have not been well captured by the conventional Reynolds averaged Navier-Stokes simulation (RANS). However, these variables obtained by the present LES agree well with those from experiments. From the instantaneous velocity and temperature fields, we explain the mechanisms responsible for the local peaks in the heat transfer distribution along the channel wall. We have also investigated the effect of rotation on the flow and heat transfer in the ribbed channel.