Journal of Fluid Science and Technology
Online ISSN : 1880-5558
ISSN-L : 1880-5558
Papers
Multi-Objective Optimization of Cooling Channel Roughened by Dimples
Abdus SAMADKwang-Yong KIMDong-Yoon SHIN
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ジャーナル フリー

2008 年 3 巻 6 号 p. 754-763

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Shape optimization of heat transfer augmentation device employed in turbine blade internal cooling passage has been performed numerically using single as well as multi-objective optimization procedures. Polynomial response surface approximation method and multi-objective genetic algorithm are used for single and multi-objective optimizations, respectively. Problem to enhance heat transfer rate considering staggered dimples on single surface of cooling passage has been formulated, and Reynolds-averaged Navier-Stokes equations are solved to analyze the flow field and the heat transfer. Three design variables defining channel and dimple dimensions, and two objective functions related to Nusselt number and friction drag are employed. Latin hypercube sampling is used to generate sampling points in design space, and the evaluated objectives are used to generate a set of optimal designs. Optimal shapes show higher heat transfer rates in the case of lower channel height, higher dimple depth and higher dimple spacing, but these geometries also produce higher pressure drops.
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© 2008 by The Japan Society of Mechanical Engineers
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