The paper describes how the acoustic impact on an impinging jet induces a maldistribution in the radial velocity field within the nearwall zone of spreading jet. The r.m.s. velocity pulsation level in the nearwall jet is lower than in the natural jet. A higher length of the laminar flow zone in a microjet was noted. The development of sinusoid-type instability facilitates a higher combustion efficiency for a propane-butane fuel mixture in the impinging microjet; this reduces the soot emission. The tests demonstrated that the zero acoustic impact makes the flame spectrum more yellow (including the flame from the nearwall zone). This testifies about deficiency of oxidizer (air) and soot presence in the combustion products. The combustion efficiency for diffusive flame in the impinging jet depends on the nozzle diameter and nozzle-target distance.

这篇论文描述了对撞击射流的声学影响如何在扩散射流近壁区域内的径向速度场中引起分布不均。近壁射流的均方根速度脉动水平低于自然射流。注意到在微型喷射器中层流区的长度更长。正弦波型不稳定性的发展促进了撞击微射流中丙烷-丁烷燃料混合物的更高燃烧效率；这减少了烟尘排放。测试表明，零声冲击使火焰光谱更黄（包括来自近壁区域的火焰）。这证明了燃烧产物中缺乏氧化剂（空气）和烟灰。射流中扩散火焰的燃烧效率取决于喷嘴直径和喷嘴目标距离。