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On the Mach Number Invariance of Gas Jets Expanding Into Hot or Cold Environments

机译:扩展到热环境或冷环境的气体射流的马赫数不变性

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摘要

Gas jet flows expanding into a space containing the same medium but at a significant temperature difference are of concern in many fields of engineering. One such example is the expansion of supersonic oxygen jets in the basic oxygen furnace (BOF) steelmaking process. While studying the characteristics of such gas jets, an interesting invariance of the local Mach number with the change in the surrounding temperature was found. The velocity and temperature of the jet at any given location increased with the increasing ambient temperature. However, the local Mach number remained the same for all ambient temperatures. This interesting result was further studied since there is no mention of it in any published literature. The reasons for these characteristics of the jet are analyzed in this paper. It is stressed that this finding is of practical importance and can be used in experimental studies of submerged gas jets expanding into environments with different ambient temperatures.
机译:在许多工程领域中,气体喷射流扩展到包含相同介质但温度差很大的空间中。一个这样的例子是在基本氧气炉(BOF)炼钢工艺中扩展超声波氧气射流。在研究这类气体射流的特性时,发现了局部马赫数随周围温度变化的有趣不变性。在任何给定位置的射流速度和温度都随着环境温度的升高而增加。但是,本地马赫数在所有环境温度下均保持不变。由于在任何已发表的文献中均未提及该有趣的结果,因此需要进一步研究。本文分析了这些特性的原因。需要强调的是,这一发现具有实际意义,可用于对进入具有不同环境温度的环境的浸没式气体射流进行实验研究。

著录项

  • 来源
    《Journal of Heat Transfer》 |2010年第3期|031701.1-031701.8|共8页
  • 作者

    R. Sambasivam; F. Durst;

  • 作者单位

    Technology Group (Global Wires and Longs), Tata Steel Ltd., Jamshedpur 831 001, India;

    FMP Technology GmbH, Am Weichselgarten 34, D-91058 Erlangen, Germany;

  • 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

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