The effects of temperature on supersonic jet noise emission
The effects of temperature on supersonic jet noise emission
复制标题
温度对超音速喷气噪声发射的影响
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
N. T. Lagen
中科院分区：
文献类型：
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作者：
J. Seiner;M. K. Ponton;B. Jansen;N. T. Lagen
本文研究了高温超音速射流产生的声音。特别地，相对于开尔文-亥姆霍兹（K-H）不稳定波的作用，考虑了超声速不稳定波对噪声发射的重要性问题。在这里，这些波被认为是马赫发射过程的同义词。利用设计的马赫数为2的轴对称水冷超声速喷管研究了射流总温从313到1534 K的变化。本研究的空气动力学和声学结果表明，在整个温度范围内，主要的噪声贡献者是K-H波。测量和数值预测的羽流特性之间的良好的协议，得到了一个椭圆形喷嘴被用来证明减少的K-H波。
This paper examines the generation of sound produced by high temperature supersonic jets. In particular, the question of the importance of supersonic instability waves to noise emission is considered relative to the role of Kelvin-Helmholtz (K-H) instability waves. Here, these waves are taken to be synonymous with the Mach emission process. Jet total temperatures from 313 to 1534 K are investigated using an axisymmetric water cooled supersonic nozzle designed for Mach 2. The aerodynamic and acoustic results of this study indicate that the dominant noise contributors are the K-H waves over the entire temperature range. Good agreement between measured and numerically predicted plume properties are obtained and an elliptic nozzle is used to demonstrate reduction of the K-H waves.