Design of a Serpentine Cooling Channel Under Turbulent Flow Using Density-Based Topology Optimization
Three-short pass cooling channels are typical internal cooling structures used in turbine blades. It well manipulates the flow field and controls heat transfer. However, a high-pressure pressure drop is one of the main concerns of this cooling channel design. Numerous prior works have varied geometrical parameters to overcome this issue, but those processes led to an extremely time- and cost-consuming. The present study utilizes a density-based topology optimization method to design the channel under turbulent flow and solve the high-pressure loss issue. Darcy numbers, convexity factors etc., are carefully examined since the effects of these parameters are rarely detailed in the majority of the previous work. The main objective is to minimize the pressure drop while restricting heat transfer. The 2D simplified models are firstly investigated, then extruded into 3D models. The results show that all parameters related to the density-based method strongly affect the final topological configuration causing high computational costs even at the 2D level. However, compared with the experimental reference channel, the optimized models show a significantly lowered pressure loss and improved heat transfer with better temperature uniformity. Overall, this method can be appropriately applied to design the complex flow channel, such as the internal cooling gas turbine blade, solar air heaters, etc
Year of publication: |
[2022]
|
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Authors: | Yeranee, Kirttayoth ; Rao, Yu ; Li, Yang ; Li, Hao |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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