The generation of sound by flames
The generation of sound by flames
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火焰产生声音
DOI：
10.1098/rspa.1979.0089
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
H. Jones
中科院分区：
文献类型：
--
作者：
H. Jones
本文研究了管内层流火焰产生声的条件。它示出，在管中的气体振荡被放大的火焰的存在下，和放大产生通过依赖的层流燃烧速度的可燃气体混合物的密度和温度的火焰传播到。该理论与Markstein的观测结果进行了比较，在不使用可调参数的情况下取得了良好的一致性。湍流火焰噪声的某些观察到的特征是根据与管火焰中发生的相同的物理过程来解释的。在这种情况下，放大在四极或更高的w极模式中是可能的，因为公认的性质是，如果源（在这种情况下是火焰）的尺寸与声音的波长相比很小，则这种模式辐射非常小的能量。与Smith & Kilham（1963）的实验结果进行了比较。
The conditions under which laminar flames in tubes can generate sound are investigated. It is shown that gaseous oscillations in a tube are amplified by the presence of a flame, and that the amplification arises through the dependence of the laminar burning velocity on the density and temperature of the combustible gas mixture into which the flame propagates. The theory is compared with observations made by Markstein and good agreement is achieved without the use of adjustable parameters. Some of the observed features of the noise of turbulent flames are interpreted on the basis of the same physical process as occur in tube-flames. In this case amplification is possible in the quadrupole or higher w-pole modes because of the well established property that such modes radiate very little energy if the dimensions of the source, in this case the flame, are small compared to the wavelength of the sound. Comparisons are made with the experimental results of Smith & Kilham (1963).