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Total Temperature Measurement of Laminar Gas Flow at Microtube Outlet: Cooled From the Wall

机译：微管出口处层流的总温度测量：从壁冷却

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摘要

This paper presents experimental results on heat transfer characteristics of laminar gas flow in a microtube with constant wall temperature whose wall temperature is lower than the inlet temperature (cooled case). The experiment was performed for nitrogen gas flow through microtuhes with 163 and 243 μm in diameter and 50 mm in length. The gas was heated in an upstream section of the microtube to T_(in)≈ 315 K, 335 K, and 355 K. The wall temperature was maintained at 305 K by circulating water around the microtube. The stagnation pressure was chosen in such a way that the exit Math number ranges from 0.1 to 0.7. The outlet pressure was fixed at the atmospheric condition. The total temperature at the outlet, the inlet stagnation temperature, the mass flow rate, and the inlet temperature were measured. The numerical computations based on the Arbitrary-Lagrangian-Eulerian (ALE) method were also performed for the same conditions of the experiment for validation of numerical results. The two results are in excellent agreement. The total and bulk temperatures obtained by the present study are also compared with the temperature of the incompressible flow.
机译：本文介绍了在壁温低于入口温度（冷却情况）的恒定壁温的微管中层流流动的传热特性的实验结果。进行了使氮气流过直径分别为163和243μm，长度为50 mm的微型管的实验。气体在微管的上游部分被加热到T_（in）≈315 K，335 K和355K。通过使水在微管周围循环，壁温保持在305K。选择停滞压力的方式应使出口数学数在0.1到0.7的范围内。出口压力固定在大气压下。测量出口处的总温度，入口停滞温度，质量流量和入口温度。在相同的实验条件下，还基于任意Lagrangian-Eulerian（ALE）方法进行了数值计算，以验证数值结果。这两个结果非常吻合。通过本研究获得的总温度和总温度也与不可压缩流的温度进行了比较。

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  • 来源
    《Heat Transfer Engineering》 |2014年第4期|142-149|共8页
  • 作者

    CHUNGPYO HONG; YUTAKA ASAKO; ICHIRO UENO; MASAHIRO MOTOSUKE;

  • 作者单位

    Department of Mechanical Engineering, Kagoshima University, Kagoshima, Japan;

    Department of Mechanical Engineering, Tokyo Metropolitan University, Tokyo, Japan;

    Department of Mechanical Engineering, Kagoshima University, Kagoshima, Japan;

    Department of Mechanical Engineering, Tokyo University of Science, Tokyo, Japan;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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