In order to enhance the efficiency of the supercharged engine’s autonomous regenerative cooling system, the numerical simulation method was used to investigate the flow and heat transfer characteristics of S - CH 4 . The findings indicate that rectangular channels exhibit superior overall heat transfer capability compared to circular channels of the same hydraulic diameter. The heat transfer performance can improve by increasing the curvature radius of rectangular channels or reducing channel height, but the pressure drop also increases accordingly. The curvature radius increases from 5 d to 7.5 d , and the density variations cause a decrease in the Richardson ratio φ . The heat transfer capability at bends results in a 31.25% reduction, while the overall heat transfer capability of the entire section is enhanced by 10.8%. The flow velocity can increase by lowering the channel height, thereby improving heat transfer, but the pressure drop will rise exponentially. When the φ exceeds 10, centrifugal force dominates the process of enhancing heat transfer, while gravity can be ignored. However, when the φ is less than 10, the secondary flow induced by the competition between centrifugal force and gravity plays a crucial role in enhancing heat transfer.


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    Title :

    Supercritical Heat Transfer of Methane in Regenerative Cooling Channels


    Contributors:
    Hai, Xiao (author) / Jiang, Wenquan (author) / Gao, Yue (author) / Yang, Fan (author) / Li, Pengfei (author) / Chen, Xuyang (author) / Wang, Changshun (author)


    Publication date :

    2025-07-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English