单侧带有周期性分布纵向涡发生器的矩形窄通道内传热强化的实验研究

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基金项目:

该研究获空泡物理和自然循环国家重点实验室基金资助

Heat Transfer Enhancement in Rectangular Narrow Channel with Periodically Mounted Longitudinal Vortex Generators on One Sidewall

1. ⒈State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, 710049, China;
2. School of Civil Engineering and City Construction, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China;
3. National Key Laboratory of Bubble Physics and Natural Circulation, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 在换热表面上周期性地安装粗糙元可以使流动区域产生漩涡从而增强换热。对单侧带有周期性分布纵向涡发生器的矩形窄通道内的强化传热进行了实验研究,得出了Re在3×10³～2×10⁴的范围内不同流动方向(顺流、逆流)条件下纵向涡发生器对流动与换热特性的影响规律。结果表明:纵向涡发生器对换热有较好的强化作用,同时通道的阻力略有增加。在3种不同比较准则(相同泵功率、相同压降及相同流量)条件下,顺流强化效果均略好于逆流。
- 纵向涡发生器 /
- 周期性 /
- 强化换热
Abstract: Repeated ribs mounted on sidewall in channels are often used to enhance convective heat transfer. In this paper, the heat transfer and fluid flow in a rectangular narrow channel with periodicallymounted Longitudinal Vortex Generators （LVGs） on one sidewall was investigated experimentally in the range of Re=3×10³ and Re=2×10⁴. The effect of flow direction on the heat performance was also con-ducted. It was found that the LVGs are able to greatly improve the comprehensive heat transfer performance. And under three kinds of comparison criterion （Identical Mass Flow-IMF, Identical Pressure Drop-IPD, Iden- tical Pumping Power-IPP）, the heat transfer performance of parallel-flow was a little better than that of counter-flow.
- Longitudinal vortex generators /
- Periodically /
- Heat Transfer enhancement