The present study is aimed at the development of a laser Doppler anemometer (LDA) for investigating high-velocity multiphase flows. Based on the analysis of the Doppler anemometry methods, requirements to modern LDAs for solving the above-mentioned problems are formulated, and the ways of their implementation with allowance for the present status of laser engineering and spectroscopy are outlined. A prototype of the anemometer with direct spectral analysis with the most updated elemental base is presented. Its workability is demonstrated by an example of supersonic gas-liquid jets; it is also shown that the anemometer can also be applied to solve other problems.

中文翻译：

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直接频谱分析的激光多普勒风速计在高速多相流研究中的开发与应用

本研究旨在开发一种用于研究高速多相流的激光多普勒风速计（LDA）。在分析多普勒风速学方法的基础上，提出了解决上述问题的现代LDA的要求，并概述了在实现激光工程和光谱学现状的情况下实现它们的方式。该风速计的原型具有直接光谱分析和最新的元素基础。超音速气液射流的例子证明了它的可操作性。还显示出风速计也可以用于解决其他问题。