超燃冲压发动机
高超音速
传热
航空航天工程
主动冷却
热的
机械
材料科学
核工程
机械工程
水冷
工程类
燃烧室
气象学
燃烧
化学
物理
有机化学
作者
Yuguang Jiang,Leqing Wang,Qilin Zhou,Nicolas Gascoin,Khaled Chetehouna,Wei Fan
标识
DOI:10.1080/10407782.2023.2203872
摘要
Hypersonic air-breathing propulsion (>Mach 5) based on scramjet offers new solutions to both the military strike platform and the civil transportation. However, the hypersonic flight seriously challenges the engine thermal protection. One of the key problems is the tricky flow and thermal behaviors of hydrocarbon fuel in regenerative cooling channels under the complex thermal boundaries and channel geometry, which may cause heat transfer deterioration and structure over-temperature. To improve the cooling design, the double-layer regenerative cooling channels are focused and compared with the traditional single-layer channels. The flow and thermal behaviors of hydrocarbon fuel under different cooling configurations are numerically studied. Cooling performance of double-layer channels is superior than single-layer channels. Tw,max falls by 295.2 K/17.7%. Gravity direction and magnitude show negligible influence on the heat transfer. Regarding channel height ratio, H1/H2 = 1.1/1 achieves optimal cooling performance in present conditions. Double-layer-channel scheme presents high practicability in scramjet cooling.
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