Abstract
The flow-noise experiments of underwater vehicle were conducted in the NWPU high speed water-tunnel. The flow-noise sound pressure spectrum characteristics of different underwater vehicle models were tested at different flow velocities and different testing point positions. The experimental results and their analysis show preliminarily that: (1) the flow-noise of underwater vehicle models was significantly influenced by fore-body linetype, flow velocities and testing point positions; (2) the flow-noise sound pressure level was smaller when the front-section diameter of fore-body was smaller and the length of fore-body was longer, the flow-noise sound pressure level increased with increasing flow velocity. (3) compared with other positions of the front-section, the flow-noise sound pressure level of the stagnation point was smallest. The flow-noise sound pressure spectra of large scale underwater vehicle were estimated with scaling law and better estimation value was obtained. We believe that the research results in this paper are helpful in the acoustic design of underwater vehicle.
| Original language | English |
|---|---|
| Pages (from-to) | 141-146 |
| Number of pages | 6 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 33 |
| Issue number | 1 |
| State | Published - 1 Feb 2015 |
Keywords
- Acoustic measuring instruments
- Acoustic noise measurement
- Angle of attack
- Autonomous underwater vehicles
- Boundary layers
- Data processing
- Design of experiments
- Flow fields
- Flow-noise
- Frequency response
- High pass filters
- Hydrophones
- Scaling law
- Schematic diagrams
- Sonar
- Turbine pumps
- Turbulent flow
- Velocity
- Water-tunnel experiment