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首页> 外文期刊>International Journal of Heat and Mass Transfer >Flow Characteristics and Heat Transfer of Supercritical n-decane in Novel Nested Channels for Scramjet Regenerative Cooling
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Flow Characteristics and Heat Transfer of Supercritical n-decane in Novel Nested Channels for Scramjet Regenerative Cooling

机译：汽轮套管再生冷却新型嵌套通道超临界N-癸烷的流动特性及传热

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摘要

A novel kind of regenerative cooling channel, a so-called nested channel, is proposed to further reduce the combustion chamber wall temperature of a scramjet. The supercritical n-decane heat transfer in the horizontal up-channel and horizontal down-channel with different flow directions are numerically investigated. The temperature distribution, flow field, and vortex structure are presented to discuss the thermal performance and flow characteristics. It is found that the nested channel with the same flow direction performs well particularly for the up-channel with the gravity direction points at the heated wall, and the vortices induced by the gravity are beneficial to the heat transfer performance. This feature is also confirmed by the Case B1 (up-channel, parallel-flow) with the n-decane flowing into the heated wall assisted by the nesting inner channel taking more heat away.
机译：提出了一种新颖的再生冷却通道，即所谓的嵌套通道，以进一步降低扰齿的燃烧室壁温度。数值研究了水平上通道中的超临界N-癸烷传热和具有不同流动方向的水平下沟道。提出了温度分布，流场和涡旋结构以讨论热性能和流动特性。结果发现，具有相同流动方向的嵌套通道很好地表现良好，特别是对于加热壁的重力方向点的向上通道，并且由重力引起的涡流是有利于传热性能的有益。该特征也通过壳体B1（上通道，并行流动）确认，该特征与N-癸烷流入由嵌套内通道辅助的加热壁中汲取更多的热量。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第3期|120836.1-120836.13|共13页
  • 作者

    Yong Li; Gongnan Xie; Yingchun Zhang; Paolo Ferla; Bengt Sunder;

  • 作者单位

    School of Mechanical Engineering Northwestern Polytechnical University Xi'an 710072 China School of Marine Science and Technology Northwestern Polytechnical University Xi'an 710072 China Department of Energy Sciences Lund University SE-22100 Lund Sweden;

    School of Marine Science and Technology Northwestern Polytechnical University Xi'an 710072 China Research & Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057 China;

    School of Mechanical Engineering Northwestern Polytechnical University Xi'an 710072 China;

    Department of Energy Sciences Lund University SE-22100 Lund Sweden Department of Engineering Universita degli Studi della Campania 'Luigi Vanvitelli' Via Roma 29 81031 Aversa (CE) Italy;

    Department of Energy Sciences Lund University SE-22100 Lund Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Supercritical n-decane; Nested channel; Gravity direction; Thermal acceleration; Vortex structure;

    机译：超临界N-癸烷;嵌套频道;重力方向;热加速;涡旋结构;

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