Effects of additional transmission chamber on flow dynamics of a pulsed jet in crossflow

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2024-11-02 DOI:10.1016/j.ast.2024.109712

Weimei Quan, Wenjing Sun, Jingzhou Zhang, Xiaoming Tan, Yuanhao Li

引用次数: 0

Abstract

This study examines the effects of an additional transmission chamber on a pulsed jet in crossflow using experimental and Large-eddy simulation methods, with a focus on the structural and mixing characteristics of the flow. Three pulse frequencies are selected (f = 20 Hz, 50 Hz, and 100 Hz), and the results of the model with an additional transmission chamber are compared with the round pipe model. The results show that the additional transmission chamber enhances jet penetration, diffusion, and mixing uniformity, particularly at higher pulse frequencies. The additional transmission chamber also alters the exit velocity profile, increasing peak velocity and promoting greater deflection under crossflow. These findings highlight the potential of transmission chambers to optimize pulsed jet performance in applications requiring effective mixing and penetration.

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附加传输室对横流脉冲射流流动动力学的影响

本研究采用实验和大涡流模拟方法研究了附加传输室对横流中脉冲射流的影响，重点关注流动的结构和混合特性。选择了三种脉冲频率（f = 20 Hz、50 Hz 和 100 Hz），并将带有附加传输室的模型结果与圆管模型进行了比较。结果表明，附加传输室增强了射流的穿透、扩散和混合均匀性，尤其是在较高的脉冲频率下。额外的传输室还改变了出口速度曲线，增加了峰值速度，并促进了横流下更大的偏转。这些发现凸显了传输室在需要有效混合和穿透的应用中优化脉冲射流性能的潜力。

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 Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.