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Regenerative Cooling System for Scramjet Engine Based on Supercritical CO2 Cycle
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Pengju ZHU, Yu SUN, Fan GONG, Jinpeng JIANG, Chengen LI
Missiles and Space Vehicles | 2025, 48(6) : 26 - 32
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Missiles and Space Vehicles | 2025, 48(6): 26-32
• Propulsion •
Regenerative Cooling System for Scramjet Engine Based on Supercritical CO2 Cycle
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Pengju ZHU, Yu SUN, Fan GONG, Jinpeng JIANG, Chengen LI
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  • National Key Laboratory of Science and Technology on Nearspace Vehicle Technology, Beijing, 100076
Published: 2025-12-25 doi: 10.7654/j.issn.2097-1974.20250604
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The scramjet engine usually employs a fuel regeneration cooling system to cool the walls. As a highly efficient thermal engine, the supercritical carbon dioxide (S-CO2) cycle system can recover and utilize heat energy to generate electricity to power equipment while reducing the amount of fuel needed for cooling and effectively enhancing the engine's overall performance. An overall parametric analysis of the cooling system for the scramjet engine is conducted based on the supercritical CO2 cycle power generation system, obtaining a system-generated power output of 65kW and a cycle efficiency of 11.75%. Additionally, the impact of various parameters is evaluated such as compressor pressure ratio, turbine inlet temperature, engine heat input, compressor inlet temperature, compressor isentropic efficiency, and turbine isentropic efficiency on system power generation and efficiency. Using a multi-objective genetic algorithm, the maximum power output and efficiency of the system are assessed, and preliminary designs for key components including the precooler and compressor are conducted.

scramjet engine  /  supercritical CO2  /  power generation system  /  regeneration cooling  /  cycle efficiency
Pengju ZHU, Yu SUN, Fan GONG, Jinpeng JIANG, Chengen LI. Regenerative Cooling System for Scramjet Engine Based on Supercritical CO2 Cycle[J]. Missiles and Space Vehicles, 2025 , 48 (6) : 26 -32 . DOI: 10.7654/j.issn.2097-1974.20250604
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doi: 10.7654/j.issn.2097-1974.20250604
  • Receive Date：2025-07-05
  • Online Date：2026-01-20
  • Published：2025-12-25
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  • Received：2025-07-05
  • Revised：2025-11-23
Affiliations
    National Key Laboratory of Science and Technology on Nearspace Vehicle Technology, Beijing, 100076
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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