Research on Flow Noise of Water Pipeline Based on Bionic Regulation

This paper focuses on typical components of ship pipeline systems and uses a hybrid computational method to analyze the flow noise in seawater elbows. By enlarging and simplifying the surface texture of shark skin, a diamond-shaped bionic texture was developed and applied to the seawater elbows. The study examines how the placement and geometric parameters of the bionic texture affect the noise reduction performance of pipeline flow noise. Results indicate that positioning the bionic texture at the end of the intake duct achieves the most stable and optimal noise reduction. Additionally, when the side-to-height ratio of the texture is approximately 2.30, the overall sound pressure level (OSPL) of the pipeline flow noise decreases by 5.86 dB. Noise reduction experiments conducted on a circulating water pipeline platform confirmed the effectiveness of the bionic texture in mitigating pipeline flow noise. The findings reveal that the bionic texture improves the velocity and vorticity field distributions, effectively reducing peak sound pressure, particularly at low frequencies. These results provide a theoretical foundation for designing bionic noise reduction features in seawater pipeline systems.