基于拓扑优化启发的再生冷却通道传热特性实验研究

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中图分类号：V231.1 文献标志码：A

Abstract： Regenerative cooling is a key cooling method for scramjet engines， and the design of its cooling channels plays a crucial role in heat transfer performance. Aimed at reducing the average wall temperature and the inlet-outlet pressure difference， the topology optimization design of the regenerative cooling channel was conducted under the fluid inlet velocity of 0.6m/s .Based on the characteristic shape generated from the optimized topology results， an S-shaped cooling channel model was fabricated. Subsequently， electric heating was used to control the heat flux， and RP-3 aviation kerosene was used as the cooling fluid. Heat transfer characteristics of both the straight channel and the S-shaped channel （optimized topology channel） were experimentally tested under the supercritical pressure of 4MPa ， with heat flux of 143， 207， 420， and applied to the inner wall. Experimental results indicate that the design of optimized topology channel effectively reduces the temperature of the outer wall Under the four heat fluxes， the average Nusselt numbers of the optimized topology channel increase by 124% ， 87% ， 26% ，and 11% ， respectively. Notably， at the lower heat flux， the optimized topology channel exhibites a more significant reduction in outer wall temperature， with the temperature reduction primarily occurring at the bend of the channel.

Keywords： topological optimization; regenerative cooling channel; supercritical pressure; heat transfer characteristics; experimental study

超燃冲压发动机可以支持马赫数Ma≥5的高超音速飞行[1]，是目前航空航天领域研究的热点。（剩余15038字）