Visualization of pressure fluctuation characteristics of weapon bay on unmanned aerial vehicle using delayed detached eddy simulation

IF 1.7 4区计算机科学 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Journal of Visualization Pub Date : 2023-10-28 DOI:10.1007/s12650-023-00947-x

Yu Liu, Binqi Chen, Yong Shi, A. Rong

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Abstract

Abstract In the present study CFD simulation with delayed detached eddy simulation (DDES) are performed to investigate pressure fluctuation environment on an open cavity and weapon bay of UAV. The main purpose of this study is to explore the aerodynamic noise level of complex cavities with slant ceiling and irregular length–depth ratio. First, two cases on an open cavity at Ma 0.85 are analyzed to determine the slant ceiling influence, which shows that the sound pressure levels increase by 1 dB due to the transverse flow effect. Then, a typical weapon bay on unmanned aerial vehicle is simulated to investigate the aerodynamic noise environment. The overall sound pressure level in the weapon bay is up to 157 dB, and when the Mach number turns from 0.6 to 0.8, the amplitude of all modes increases about 16–23 dB. The main focuses of this investigation are to discuss the mechanism of noise generation in a slant ceiling cavity and determine the pressure fluctuation characteristic of a typical weapon bay on unmanned aerial vehicle. Graphical abstract

Abstract Image

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基于延迟分离涡模拟的无人机武器舱压力波动特性可视化

摘要采用延迟分离涡模拟(DDES)对无人机空腔和武器舱的压力波动环境进行CFD仿真研究。本研究的主要目的是探讨具有倾斜顶板和不规则长深比的复杂腔体的气动噪声水平。首先，对两种情况下马氏0.85的开腔进行了分析，确定了斜顶的影响，结果表明横向流动效应使声压级提高了1 dB。然后，对某典型无人机武器舱进行仿真，研究其气动噪声环境。武器舱内总声压级高达157 dB，当马赫数从0.6变为0.8时，各模态振幅增加约16-23 dB。本文的研究重点是探讨斜顶棚腔内噪声的产生机理，确定典型无人机武器舱的压力波动特性。图形抽象

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 Visualization COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS-IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： Visualization is an interdisciplinary imaging science devoted to making the invisible visible through the techniques of experimental visualization and computer-aided visualization. The scope of the Journal is to provide a place to exchange information on the latest visualization technology and its application by the presentation of latest papers of both researchers and technicians.