Investigations of the Atomization Characteristics and Mechanisms of Liquid Jets in Supersonic Crossflow

IF 2.1 3区工程技术 Q2 ENGINEERING, AEROSPACE

Aerospace Pub Date : 2023-11-27 DOI:10.3390/aerospace10120995

Donglong Zhou, Jianlong Chang, Huawei Shan

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Abstract

In the combustion chamber of scramjets, fuel jets interact with supersonic airflow in the form of a liquid jet in crossflow (LJIC). It is difficult to achieve adequate jet–crossflow mixing and the efficient combustion of fuel in an instant. Large eddy simulation (LES), the coupled level-set and volume of fluid (CLSVOF) method, and an adaptive mesh refinement (AMR) framework are used to simulate supersonic LJICs in this article. This way, LJIC atomization characteristics and mechanisms can be further explored and analyzed in detail. It is found that the surface waves of the liquid column exist in a two-dimensional form, including vertical and spanwise directions. Column breakup occurs when all the spanwise surface waves between adjacent vertical surface waves break up. Bow shock waves, composed of multiple connected arcuate shock waves, are dynamic and will change with the evolution of the liquid column. The vortex ring movement of supersonic LJICs, whose trends in the vertical and spanwise directions are different, is relatively complex, which is due to the complex and time-dependent shape of liquid columns.

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超音速横流中液体射流的雾化特性和机理研究

在scramjets的燃烧室中，燃料射流以横流液体射流（LJIC）的形式与超音速气流相互作用。要在瞬间实现射流与横流的充分混合和燃料的高效燃烧非常困难。本文采用大涡流模拟（LES）、液位和体积耦合（CLSVOF）方法以及自适应网格细化（AMR）框架来模拟超音速 LJIC。通过这种方法，可以进一步详细探索和分析 LJIC 的雾化特性和机理。研究发现，液柱的表面波以二维形式存在，包括垂直方向和跨度方向。当相邻垂直表面波之间的所有跨向表面波破裂时，就会发生液柱破裂。由多个相连的弧形冲击波组成的弓形冲击波是动态的，会随着液柱的演变而变化。超音速 LJIC 的涡环运动在垂直方向和跨度方向上的趋势不同，相对复杂，这是由于液柱的形状复杂且随时间变化。

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

Aerospace ENGINEERING, AEROSPACE-

CiteScore

3.40

自引率

23.10%

发文量

661

审稿时长

6 weeks

期刊介绍： Aerospace is a multidisciplinary science inviting submissions on, but not limited to, the following subject areas: aerodynamics computational fluid dynamics fluid-structure interaction flight mechanics plasmas research instrumentation test facilities environment material science structural analysis thermophysics and heat transfer thermal-structure interaction aeroacoustics optics electromagnetism and radar propulsion power generation and conversion fuels and propellants combustion multidisciplinary design optimization software engineering data analysis signal and image processing artificial intelligence aerospace vehicles'' operation, control and maintenance risk and reliability human factors human-automation interaction airline operations and management air traffic management airport design meteorology space exploration multi-physics interaction.