Study On Noise Reduction Of High Temperature And High Pressure Water's Underwater Discharge

When high temperature and high pressure water directly discharge into the air or water, intense jet noise or cavitating noise would cause serious noise pollution.This paper's key thing is to treat the high temperature and high pressure water, reduce the generation of noise to a reasonable level. After fully investigation and analysis to critical flow, principle of jet pump and mechanism of nosie generation, accompanied with the compact requirement, this paper put forward a new discharge scheme, that is passing high temperature and high pressure water through a jet pump, indrafting cooling weater, then the mixing water flows through a muffler. With evaporation's sluggish property, the high temperature water is cooled before large scale vaporation happens, which reduces the noise generation.Jet pump and muffer were designed in this paper. The models which created in ANSYS were guided into numerical simulation software FLUENT and SYSNOISE, then dynamic characteristic of jet pump, resistence property and acoustic performance of muffer were gained. Several relevant models were also computed with the softwares. The results showed directions of improving the cooling effects and acoustic attenuation. Experiments were carried out in order to verify the effects of the discharge scheme. The scheme could not only be used to eliminate the intense noise pollution that generates from high temperature and high pressure water's air discharge, but also be used to solve the noise that generates from high temperature and high pressure water's under water discharge.The study has significant influence on elimimating noise pollution, improving sailors' working environment and enhancing the warships' battle effectiveness.