Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2007.05b
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- Pages.2552-2557
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- 2007
Evaluation of Optimization Models for a Dimpled Channel to Enhance Heat Transfer
딤플 유로의 열전달 증진을 위한 최적화모델 비교
- Published : 2007.05.30
Abstract
Shape optimization of an internal cooling passage with staggered dimples on single surface is performed and performances of surrogates are evaluated in this paper. Optimizations are performed so that turbulent heat transfer can be enhanced compromising with pressure loss due to friction. The three-dimensional governing differential equations have been solved to find the overall Nusselt number and friction factor which are related to the objective functions of this problem. Three design variables were selected among the dimensionless geometric variables. Basic surrogate models such as second order polynomial response surface approximation (RSA), Kriging meta-modeling technique, radial basis neural network (RBNN), and derived press based averaged (PBA) surrogate model are constructed. The optimal points are searched from the above constructed surrogates by sequential quadratic programming (SQP). It is shown that use of multiple surrogates can increase the robustness in prediction of better design with minimum computational cost.
Keywords
- Surrogate model;
- Dimpled channel;
- Heat transfer;
- Shape Optimization;
- Reynolds-Averaged Navier-Stokes Equations
- 대리모델;
- 딤플 채널;
- 열전달;
- 형상최적화;
- 레이놀즈평균 내비어-스톡스 방정식;