固体火箭技术2025，Vol.48Issue(2)：234-241,8.DOI:10.7673/j.issn.1006-2793.2025.02.008
超燃冲压发动机热管理系统不同工质冷却性能对比研究
A comparative study on the cooling performance of different working fluids in the thermal management system of scramjet
徐静 1党朝磊 1王毅琳 1王思博 1秦江 1刘小勇1
作者信息
- 1. 哈尔滨工业大学 能源科学与工程学院,哈尔滨 150001
- 折叠
摘要
Abstract
The thermal management system of scramjet based on closed Brayton cycle can achieve thermal protection of the en-gine and generate electric energy simultaneously.Regarding the selection of working fluids for the thermal management system of scramjet engines,a quasi-one-dimensional model of cooling channels was adopted to compare the cooling performance of closed Brayton cycle working fluids.The wall temperature of the cooling channel in the literature was used to validate the model,and the heat transfer effects of n-decane,supercritical carbon dioxide(S-CO2),and helium(He)were studied under different heat flux and mass flow rates.The results show that with the increase of heat flux,the outlet temperature,the maximum value of wall temperature and the heat transfer coefficient of n-decane increase.The wall temperature of the S-CO2 cooling channel show a trend of first decrea-sing to 400 K and then increasing to over 800 K,indicating local heat transfer enhancement at a distance of approximately 0.08 m from the inlet to the downstream.However,as the mainstream temperature gradually move away from the pseudo-critical region,the heat transfer coefficient of S-CO2 first decrease and then stabilize at 0.5×104 W/(m2·K).After moving away from the pseudo-criti-cal temperature region,the wall temperature is very high.Due to the large heat transfer coefficient of helium,the maximum wall tem-perature is only about 550 K under the condition of 4 g/s,and the cooling ability is the best among the three working fluids.关键词
超燃冲压发动机/主动热防护/碳氢燃料/S-CO2/He/换热效果Key words
scramjet/active thermal protection/hydrocarbon fuel/supercritical carbon dioxide/helium/heat exchange effect分类
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徐静,党朝磊,王毅琳,王思博,秦江,刘小勇..超燃冲压发动机热管理系统不同工质冷却性能对比研究[J].固体火箭技术,2025,48(2):234-241,8.
