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Effect of Vibration on Forced Convection Heat Transfer for SiO_2-Water Nanofluids

机译：振动对SiO_2-水纳米流体强迫对流换热的影响

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摘要

In the process of heat transfer, the fluid type and external parameters have a significant impact on heat transfer performance. For this reason, the physical properties, pressure differences, and heat transfer rates of SiO_2-water nanofluids have been experimentally investigated in a straight circular pipe. Experimental results revealed a great difference in physical properties between SiO_2-water nanofluids and purified water. The friction factor of low-volume-concentration nanofluids was slightly increased for laminar flow and tended to be almost independent of the Reynolds number for turbulent flow. The heat transfer coefficient can be enhanced either by adding nanoparticles to purified water or by imposing a transverse vibration on the heat transfer surface. Using these two methods at the same time (compound heat transfer enhancement), heat transfer performance is much better than that with either method alone. The largest increase of about 182% was observed under conditions of compound heat transfer enhancement.
机译：在传热过程中，流体类型和外部参数对传热性能有重大影响。因此，已经在直圆管中实验研究了SiO_2-水纳米流体的物理性质，压力差和传热速率。实验结果表明，SiO_2-水纳米流体与纯净水在物理性能上有很大差异。对于层流，低体积浓度纳米流体的摩擦系数略有增加，并且对于湍流，其摩擦系数几乎与雷诺数几乎无关。通过将纳米颗粒添加到纯净水中或在传热表面上施加横向振动，可以提高传热系数。同时使用这两种方法（增强复合传热），传热性能比单独使用任何一种方法都要好得多。在复合传热增强的条件下，观察到最大增加约182％。

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  • 来源
    《Heat Transfer Engineering》 |2015年第8期|452-461|共10页
  • 作者

    LIANG ZHANG; JIZU LV; MINLI BAI; DETIAN GUO;

  • 作者单位

    School of Energy and Power Engineering, Dalian University of Technology, Dalian, China;

    School of Energy and Power Engineering, Dalian University of Technology, Dalian, China;

    School of Energy and Power Engineering, Dalian University of Technology, Dalian, China,School of Energy and Power Engineering, Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, 116024, China;

    School of Energy and Power Engineering, Dalian University of Technology, Dalian, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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