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Achieving Heat Flux Uniformity Using an Optimal Arrangement of Impinging Jet Arrays

机译：使用射流阵列的最佳布置实现热通量均匀性

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摘要

In order to achieve uniform distribution of heat flux over an isothermal heated target surface, a numerical algorithm is developed to obtain an optimized array of four laminar impinging slot jets. Root mean square deviation of the local Nusselt distribution from the desired Nusselt number is considered as the objective function. Jets' widths, jet-to-jet and jet-to-surface spacings, and the overall flow rate are chosen as design variables. Conjugate gradients method along with backtracking line search is applied to optimize the objective function calculated by numerical simulation for three different cases of Nu = 7, 9, and 11. For each of these desired Nusselt numbers, an almost uniform distribution of local Nusselt number with percent of root mean square error less than 2.5% is achieved in fewer than 12 iterations. An experimental study using a Mach-Zehnder interferometer (MZI) has been performed. The measured distribution of local Nusselt number is in good agreement with numerical results in all three optimal configurations.
机译：为了在等温加热的目标表面上实现热通量的均匀分布，开发了一种数值算法来获得四个层流撞击缝隙射流的优化阵列。本地Nusselt分布与所需Nusselt数的均方根偏差被视为目标函数。选择喷射器的宽度，喷射器之间的距离以及喷射器与表面之间的距离以及总流速作为设计变量。共轭梯度法与回溯线搜索一起用于优化针对Nu = 7、9和11的三种不同情况通过数值模拟计算得出的目标函数。对于每个所需的Nusselt数，局部Nusselt数几乎均匀地分布为在不到12次迭代中，均方根误差的百分比小于2.5％。已经进行了使用马赫曾德尔干涉仪（MZI）的实验研究。在所有三个最佳配置中，本地Nusselt数的测量分布与数值结果都非常吻合。

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  • 来源
    《Journal of Heat Transfer》 |2015年第6期|061002.1-061002.8|共8页
  • 作者

    M. Forouzanmehr; H. Shariatmadar; F. Kowsary; M. Ashjaee;

  • 作者单位

    School of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran 1439957131, Iran;

    School of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran 1439957131, Iran;

    School of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran 1439957131, Iran;

    School of Mechanical Engineering, University College of Engineering, University of Tehran, Tehran 1439957131, Iran;

  • 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

    inverse design; optimization; heat flux uniformity; conjugate gradients; interferometry;

    机译：反设计优化;热通量均匀性;共轭梯度干涉仪;

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