|
| Numerical Simulation of Noise Characteristics in a Closed Shooting Range Based on CFD-CAA Technology |
| Received:June 20, 2023 Revised:August 28, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.12.011 |
| KeyWord:closed shooting range CAD-CAA muzzle flow field shooting noise dynamic grid FW-H realizable k-ɛ |
| Author | Institution |
| GAO Pan |
School of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| HU Ming |
School of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| YU Yang |
Norendar International Ltd., Shijiazhuang , China |
| DUAN Le-le |
Norendar International Ltd., Shijiazhuang , China |
| YU Hang-jian |
School of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| 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. |
| Close |
|
|
|