| 高盘,胡明,于洋,段乐乐,于航鉴.基于CFD-CAA技术某封闭靶场内噪声特性数值模拟[J].装备环境工程,2023,20(12):85-94. GAO Pan,HU Ming,YU Yang,DUAN Le-le,YU Hang-jian.Numerical Simulation of Noise Characteristics in a Closed Shooting Range Based on CFD-CAA Technology[J].Equipment Environmental Engineering,2023,20(12):85-94. |
| 基于CFD-CAA技术某封闭靶场内噪声特性数值模拟 |
| Numerical Simulation of Noise Characteristics in a Closed Shooting Range Based on CFD-CAA Technology |
| 投稿时间：2023-06-20 修订日期：2023-08-28 |
| DOI：10.7643/issn.1672-9242.2023.12.011 |
| 中文关键词: 封闭靶场 CAD-CAA 膛口流场 射击噪声 动网格 FW-H Realizablek-ɛ 中图分类号:TJ012.2 文献标识码:A 文章编号:1672-9242(2023)12-0085-10 |
| 英文关键词:closed shooting range CAD-CAA muzzle flow field shooting noise dynamic grid FW-H realizable k-ɛ |
| 基金项目:辽宁省博士科研启动基金计划项目(2021-BS-162)；辽宁省教育厅高等院校基本科研项目(LJKZ0273) |
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| Author | Institution |
| GAO Pan | School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China |
| HU Ming | School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China |
| YU Yang | Norendar International Ltd., Shijiazhuang 050011, China |
| DUAN Le-le | Norendar International Ltd., Shijiazhuang 050011, China |
| YU Hang-jian | School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China |
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| 中文摘要: |
| 目的 预测某封闭靶场排烟室与射击室内的射击噪声特性，为排烟室降噪与射击孔隔音方案设计提供参考。方法 在比测室外射击噪声试验数据，保证仿真精度的前提下，采用CFD-CAA耦合算法，对9 mm手枪射击时特定封闭靶场内的射击噪声进行数值计算。首先使用Realizable k-ɛ模型，结合动网格技术，对封闭靶场内射击时的膛口流场进行数值计算。然后开启FW-H声学计算模型，计算各监测点声学数据。结果 封闭靶场内射击时，排烟室内各监测点噪声声压级较室外射击时均有增强，增强效果在20°方位角监测点尤为明显，最大增强2.682 dB。结论 与室外射击相比，在封闭靶场内射击时，排烟室内射击噪声的峰值声压级较大，混响时间加长，应针对性选择吸音方案，降低混响时间。射击室射手人耳处噪声声压级接近安全阈值，应改进射击孔隔音方案，降低人耳处直达声。 |
| 英文摘要: |
| The work aims to predict the characteristics of the shooting noise in smoke exhaust chamber and shooting room of a closed shooting range to provide reference schemes of noise reduction in the smoke exhaust chamber and sound insulation in the firing hole. In this paper, the CFD-CAA coupling algorithm was used to calculate the shooting noise of a 9 mm pistol in a specific closed shooting range, under the premise that the simulation accuracy was guaranteed by comparing the results of noise test and numerical simulation of outdoor shooting. Firstly, the Realizable k-ɛ model and the dynamic grid technique were used to calculate the muzzle flow field in a closed shooting range. Then, the FW-H acoustic calculation model was used to calculate the acoustic data of each monitoring point. Compared with outdoor shooting, the noise pressure level of each monitoring point in the smoke exhaust chamber was enhanced when shooting in the closed shooting range. In particular, the noise pressure level at the 20° azimuth monitoring point was enhanced by 2.682 dB, which was the most obvious. In addition, the sound pressure level of each monitoring point in the shooting room increased with the increase of the azimuth angle. Compared with outdoor shooting, the peak sound pressure level of the shooting noise in the smoke exhaust chamber is higher and the reverberation time is longer, so an effective sound absorption scheme should be adopted to reduce the noise reverberation time. Moreover, the sound pressure level of the shooter's ear noise in the shooting room is close to the safety threshold, so it is necessary to improve the sound insulation scheme of the firing hole to reduce the direct sound at the shooter′s ear. |
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