消声器环形挡板对9mm半自动手枪流场和远场噪声水平的影响分析

IF 0.8 4区 工程技术 Q3 MULTIDISCIPLINARY SCIENCES
Onur Gurdamar, Seyda Ozbektas, Bilal Sungur
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引用次数: 0

摘要

火器在炮口流动过程中会产生复杂的现象,对炮口周围的流场进行建模对高强度噪声的预测具有重要意义。噪声的负面影响可以通过在枪管的内部或外部安装一个消声器来减小。本文的目的是通过数值和实验研究消声器中环形挡板的数量和距离对流场和远场噪声水平的影响。在二维、轴对称、瞬态条件下进行了计算,求解了Ffowcs Williams和Hawkings声学类比(FW-H)方程来预测远场噪声。模拟比较了无消声器、消声器无挡板、距离消声器入口20 mm间隔放置1、3、5个挡板和等距放置1、3、5、7、9个挡板的9种情况;分析了射击过程中产生的噪声。结果表明,在不加消声器的情况下,2.5 m距离处的峰值声压级为156.1 dB,而在加7块消声器的情况下,峰值声压级下降了近7.6%,平均为144.2 dB。研究结果可为小口径火炮系统的炮口噪声预测和消声器挡板数量的优化提供有益的参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of the Effect of Circular Ring Baffles in Suppressor on Flow Field and Far Field Noise Levels at 9 mm Semi Automatic Pistol
A firearm generates complex phenomena in muzzle flow and modelling the flow field around the projectile has great importance on high-intensity noise prediction. The negative effects of noise can be reduced using a suppressor which can be internally or externally attached to the barrel of a firearm. The purpose of this paper is to numerically and experimentally investigate the effect of the number and distance of circular ring baffles in the suppressor on the flow field and far field noise levels. Calculations were carried out in two-dimensional, axisymmetric, transient conditions and Ffowcs Williams and Hawkings acoustic analogy (FW-H) equations were solved to predict the far field noise. Nine cases including a gun without a suppressor, a suppressor without baffles, one, three, and five baffles which were placed at 20 mm intervals from the suppressor inlet, and one, three, five, seven, and nine baffles which were placed with equal intervals in the suppressor were simulated and compared; generations of noise during the shooting process were analyzed. The results showed that in the case without a suppressor, the peak sound pressure level was 156.1 dB at a 2.5 m distance, while this value decreased by nearly 7.6% in the case of the suppressor with seven baffles which has an average value of 144.2 dB. The results obtained here may provide a beneficial reference for predicting the muzzle noise and optimizing the number of baffles in the suppressor for small caliber gun systems.
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来源期刊
Defence Science Journal
Defence Science Journal 综合性期刊-综合性期刊
CiteScore
1.80
自引率
11.10%
发文量
69
审稿时长
7.5 months
期刊介绍: Defence Science Journal is a peer-reviewed, multidisciplinary research journal in the area of defence science and technology. Journal feature recent progresses made in the field of defence/military support system and new findings/breakthroughs, etc. Major subject fields covered include: aeronautics, armaments, combat vehicles and engineering, biomedical sciences, computer sciences, electronics, material sciences, missiles, naval systems, etc.
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