|
| Noise Sources Analysis of the Engine Model on Basis of Acoustical Sources Mapping |
| Received:July 08, 2021 Revised:August 14, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.10.005 |
| KeyWord:acoustical source mapping microphone array launch vehicle jet noise analysis |
| Author | Institution |
| WEI Long |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
| QIN Zhao-hong |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
| REN Fang |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
| CHEN Lu |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
| ZHANG Zhong |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
| HOU Chuan-tao |
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| In the noise environment test of engine test run, the sound source imaging measurement method based on microphone array provides a supplementary measurement method in addition to the near-field single point measurement. In this text, in order to validate the effectiveness of acoustic source mapping on the basis of microphone array during the launch vehicle engine test. Through the engine model test, the microphone array was designed and built to measure the noise environment, and the noise source characteristics of jet flow in the engine test were analyzed in detail. The characteristics of noise sources in time domain and frequency domain are obtained by means of sound source imaging analysis. The energy of the jet noise source in the low frequency part is relatively high, and the sound source is mainly distributed at the downstream position of the jet away from the nozzle; in the high frequency part, the sound source is mainly distributed near the nozzle. In the 1/3 octave band with a center frequency of 2000 Hz, the sound pressure level of the largest source location is farthest from the nozzle. The feasibility of sound source imaging in noise source analysis of engine model test vehicles was verified through tests and analysis. |
| Close |
|
|
|