基于射流管延伸和声激励器集成的受限横流通道方阵射流冲击传热强化

  • 吕元伟 ,
  • 谭钧文 ,
  • 毛佳宁 ,
  • 陈格 ,
  • 张镜洋 ,
  • 张靖周 ,
  • 王奉明
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  • 1. 南京航空航天大学
    2. 上海卫星工程研究所
    3. 南京航空航天大学航天学院
    4. 南京航空航天大学能源与动力学院
    5. 空军装备研究院总体所(中国科学院热物所读博士)

收稿日期: 2025-11-10

  修回日期: 2026-05-12

  网络出版日期: 2026-05-14

基金资助

国家自然科学基金;中国航发集团产学研合作项目基金

On Heat Transfer Enhancement of Square-Array Jet Impingement in a Confined Crossflow Channel by Using Extended Jet Pipe and Integrated Acoustic Actuator

  • TAN Jun-Wen ,
  • MAO Jia-Ning ,
  • CHEN Ge ,
  • ZHANG Jing-Yang ,
  • ZHANG Jing-Zhou ,
  • WANG Feng-Ming
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Received date: 2025-11-10

  Revised date: 2026-05-12

  Online published: 2026-05-14

Supported by

National Natural Science Foundation of China;Industry-University-Research Fund of Aero Engine Corporation of China

摘要

针对无量纲高度H/d=3的受限横流通道中的2′2方阵连续射流(无量纲节距X/d=Y/d=4)冲击对流传热开展了试验研究,重点关注方阵中央声激励合成射流集成和射流管延伸的主被动强化及其组合方式传热强化效果。方阵射流雷诺数Re=3000~10000,在f=250Hz恒定激励频率下,相应的合成射流与方阵射流速度比RSJ-CJ=2.0~0.6;射流管延伸调节喷口与壁面的无量纲法向距离为L/d=1~3。在本文参数范围内,研究结果表明:Re=3000时,合成射流集成方式的传热强化效果明显高于射流管延伸方式,在组合方式的对流传热强化中占据主导机制,与无合成射流集成和无射流管延伸的基准情形相比,当横流与方阵射流速度比RCF-CJ?0.67时区域面积平均努塞尔数(Nus-av)相对提高可达2倍以上;而在Re=10000时,射流管延伸则为对流传热强化的主导机制,RCF-CJ=0.5下的Nus-av相对基准情形提升幅值可达1倍,此时在射流管延伸方阵中合成射流集成的作用几乎得不到体现;方阵射流管延伸和合成射流集成的组合方式只有当两者强化传热作用基本相当时方能体现出其有益性,相对于单一方式,组合方式在Re=5000和RCF-CJ=0.6~0.8时显现出较为显著的强化传热再提升效果。

本文引用格式

吕元伟 , 谭钧文 , 毛佳宁 , 陈格 , 张镜洋 , 张靖周 , 王奉明 . 基于射流管延伸和声激励器集成的受限横流通道方阵射流冲击传热强化[J]. 航空学报, 0 : 1 -0 . DOI: 10.7527/S1000-6893.2026.33064

Abstract

An experimental investigation is performed to the convective heat transfer in a confined crossflow channel with a specific dimension-less height of H/d=3, produced from a 2′2 square-array impinging jets with dimensionless pitches of X/d=Y/d=4. Particular focus is played on the heat transfer enhancement by using the passively extended jet pipes and the actively center-positioned synthetic jet in the continuous-jet square array, as well as their combination schemes. In the present study, square-array jet Reynolds number (Re)ranges from 3000~10000, and the synthetic jet acoustic actuator is driven at a fixed frequency of f=100Hz. Correspondingly, the synthetic jet velocity ratios (defined as the ratio of synthetic jet characteristic velocity to square-array jet ejecting velocity, RSJ-CJ)are varied from 2.0 (under Re=3000)to 0.6 (under Re=10000). From the jet pipe extension, the dimensionless normal distance between jet outlet and targeting wall is adjusted in a range of L/d=1~3. Within the scope of this study, the heat transfer enhancement roles are clearly illustrated. Under Re=3000, the synthetic jet integration demonstrates a significantly stronger heat transfer augment role than the jet pipe extension, taking on dominant heat transfer enhancement mechanism in the combination scheme. With respect to the base-line situation (no synthetic jet integration and no jet pipe extension), the area-averaged Nusselt number on a specified zone could be increased up to 200% when the crossflow velocity ratio (defined as the ratio of crossflow inlet velocity to square-array jet ejecting velocity, RCF-CJ)beyond 0.67. Whereas under Re=10000, the jet pipe extension plays dominant heat transfer enhancement mechanism on the otherwise. the area-averaged Nusselt number could be increased up to 100% at RCF-CJ=0.5 in relation to the baseline situation. Meanwhile, in the square array with the extended jet pipes, the role of synthetic jet integration is very faint. The most possibilities wherein the combination of synthetic jet integration and jet pipe extension could exhibit obviously its significance on heat transfer enhancement appear when both schemes display equivalent heat transfer augment roles. For instance, under Re=5000 and RCF-CJ=0.6~0.8, the combination scheme shows an obviously further improvement on heat transfer enhancement, in related to the single scheme either in active or passive.

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