柴油机水下排气噪声影响因素研究及降噪途径

The Ways to Attenuate and the Factors to Affect Noise Generated from Submerged Exhaust of a Diesel Engine

对形成潜艇柴油机水下排气噪声的一些影响因素进行了实验研究,给出了水下排气噪声在低频、中频、及高频范围内的频谱特点。

The experimental studies of influence factors on noise generated from submerged exhaust of a multicylinder diesel engine are done in a water pool.The characters and regularities of submerged exhaust noise spectra in different frequeny regions are revealed to a certain degree by spectrum analysis, and primary control measures of the submerged exbaust noise are discussed.