Features of Measurement of Local Parameters of Near-Wall Liquid Films in Supersonic Nozzles

IF 1.3 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Engineering Thermophysics Pub Date : 2025-01-17 DOI:10.1134/S1810232824040027

V. N. Yarygin, I. V. Yarygin, V. G. Prikhodko, A. D. Nazarov

引用次数: 0

Abstract

The work presents development of a technique for measurement of the local parameters of a near-wall liquid film (film thickness, leading edge velocity, and wave velocity on the film surface) under conditions of a co-current supersonic gradient gas flow. The parameters of an ethanol film with a co-current air flow inside a supersonic conical nozzle with the Mach number M = 2.75 were measured. The decisive role of the gas flow on the parameters of the near-wall film has been shown. It has been established that phase transitions appear in the liquid film within the nozzle because the static pressure in the gas flow over the film drops below the saturated vapor pressure of the liquid.

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超声速喷管近壁液膜局部参数测量特点

这项工作提出了一种在共流超音速梯度气流条件下测量近壁液体膜局部参数（膜厚度、前缘速度和膜表面波速）的技术发展。对马赫数M = 2.75的超音速锥形喷管内共流乙醇膜的参数进行了测量。指出了气流对近壁膜参数的决定性作用。已经确定，在喷嘴内的液膜中出现相变是因为流过膜的气体的静压降至液体的饱和蒸气压以下。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL

CiteScore

2.30

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.