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论文:2020,Vol:38,Issue(2):303-308 |
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引用本文： |
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赵波, 符澄, 裴海涛, 廖达雄, 朱博. 椭圆翅片管对风洞气流湍流特性影响研究[J]. 西北工业大学学报 |
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ZHAO Bo, FU Cheng, PEI Haitao, LIAO Daxiong, ZHU Bo. Study on the Effect of Oval Tubes on Airflow Turbulence Characteristics in Wind Tunnel[J]. Northwestern polytechnical university |
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| 椭圆翅片管对风洞气流湍流特性影响研究 |
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| 赵波1,2, 符澄1,2, 裴海涛2, 廖达雄1,2, 朱博2 |
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1. 中国空气动力研究与发展中心 空气动力学国家重点实验室, 四川 绵阳 621000;
2. 中国空气动力研究与发展中心 设备设计及测试技术研究所, 四川 绵阳 621000 |
| 摘要: |
| 针对风洞中应用的某型椭圆翅片管热交换器，开展了换热管束对气流扰动特性仿真研究。首先利用试验结果验证了数值方法的可靠性，然后通过数值仿真着重对比分析了不同来流条件下热交换器下游湍流发展变化特性，并对管排数目和翅片间距对热交换器下游气流扰动和流场分布的影响展开了研究。结果表明：热交换器换热管束对上游不均匀来流有较强的整流作用，可使流动分布趋向均匀；热交换器后气流的湍流强度受来流条件影响不大，主要取决于换热管束本身的结构参数；热交换器后气流湍流强度在入口流体流动方向上很快衰减，该型热交换器在入口下游600 mm处湍流强度即可减小到7.5%，与试验测试值吻合较好。 |
| 关键词:
风洞
热交换器
椭圆翅片管
湍流特性
数值仿真
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| Study on the Effect of Oval Tubes on Airflow Turbulence Characteristics in Wind Tunnel |
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| ZHAO Bo1,2, FU Cheng1,2, PEI Haitao2, LIAO Daxiong1,2, ZHU Bo2 |
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1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China |
| Abstract: |
| The flow Turbulence characteristics of finned oval tube heat exchanger used in wind tunnel were studied by using numerical simulation method. Firstly, the reliability of the numerical method was verified by the experimental results. And then the research was focused on the comparative analysis of the characteristics of turbulent flow downstream of heat exchanger under different inflow conditions, and the influence of the tubes number and fins spacing on the airflow turbulence and the flow field distribution downstream of heat exchanger were obtained too. The results indicate that oval tubes have a significant effect for improving the flow quality when incoming flow is inhomogeneous, and the velocity distribution behind heat exchanger tends to become uniform. Inflow conditions have a slight effect on the turbulence intensity behind heat exchanger, which mainly depends on the structural parameters of heat transfer tubes. The turbulence intensity decays very quickly in the flow direction. The value is reduced to 7.5% at the cross section 600 mm downstream of the heat exchanger inlet, which agrees well with the experimental result. |
| Key words:
wind tunnel
heat exchanger
finned oval tube
turbulence characteristic
numerical simulation
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| 收稿日期: 2019-05-14
修回日期:
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| DOI: 10.1051/jnwpu/20203820303 |
| 基金项目: 空气动力学国家重点实验室基金（JBKY15040501）资助 |
| 通讯作者:
Email： |
| 作者简介: 赵波(1983-),中国空气动力研究与发展中心助理研究员,主要从事风洞气动设计及设备传热研究。
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| 符澄 在本刊中的所有文章 |
| 裴海涛 在本刊中的所有文章 |
| 廖达雄 在本刊中的所有文章 |
| 朱博 在本刊中的所有文章 |
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