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首页> 外文期刊>International Journal of Heat and Fluid Flow >Towards a theoretical model of heat transfer for hot-wire anemometry close to solid walls
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Towards a theoretical model of heat transfer for hot-wire anemometry close to solid walls

机译：建立接近实心壁的热线风速传热理论模型

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摘要

Hot-wire anemometry readings where the sensor is close to a solid wall become erroneous due to additional heat losses to the wall. Here we examine this effect by means of experiments and numerical simulations. Measurements in both quiescent air as well as laminar and turbulent boundary layers confirmed the influences of parameters such as wall conductivity, overheat ratio and probe dimensions on the hot-wire output voltage. Compared to previous studies, the focus lies not only on the streamwise mean velocity, but also on its fluctuations. The accompanying two-dimensional steady numerical simulation allowed a qualitative discussion of the problem and furthermore mapped the temperature field around the wire for different wall materials. Based on these experimental and numerical results, a theoretical model of the heat transfer from a heated wire close to a solid wall is proposed that accounts for the contributions from both convection and conduction. (C) 2017 Elsevier Inc. All rights reserved.
机译：传感器靠近实心壁的热线风速仪读数由于错误的壁面热量损失而变得错误。在这里，我们通过实验和数值模拟来检验这种影响。在静态空气以及层流和湍流边界层中的测量结果证实了诸如壁电导率，过热比和探头尺寸等参数对热线输出电压的影响。与以前的研究相比，重点不仅在于河流平均速度，还在于其波动。随附的二维稳态数值模拟可以对问题进行定性讨论，并且可以针对不同的墙体材料绘制导线周围的温度场。基于这些实验和数值结果，提出了从靠近实心壁的加热丝传热的理论模型，该模型考虑了对流和传导的影响。 （C）2017 Elsevier Inc.保留所有权利。

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  • 来源
    《International Journal of Heat and Fluid Flow》 |2017年第12期|248-256|共9页
  • 作者

    Ikeya Yuta; Orlu Ramis; Fukagata Koji; Alfredsson P. Henrik;

  • 作者单位

    Keio Univ, Dept Mech Engn, Hiyoshi 3-14-1, Yokohama, Kanagawa 2238522, Japan|KTH Mech, Linne FLOW Ctr, Osquars Backe 18, SE-10044 Stockholm, Sweden;

    KTH Mech, Linne FLOW Ctr, Osquars Backe 18, SE-10044 Stockholm, Sweden;

    Keio Univ, Dept Mech Engn, Hiyoshi 3-14-1, Yokohama, Kanagawa 2238522, Japan;

    KTH Mech, Linne FLOW Ctr, Osquars Backe 18, SE-10044 Stockholm, 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

    Hot-wire anemometry; Wall turbulence; Heat transfer;

    机译：热线风速仪;壁湍流;传热;

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