常规潜艇废气涡轮增压柴油机排气冷却消声器的功用分析

本文分析了德国ＭＴＵ３９６ＳＢ８３和ＭＴＵ３９６ＳＥ８４两型潜用废气涡轮增压柴油机的排气冷却消声器的功用。作者认为，该排气冷却消声器的功用不仅仅是削减排气（空气）噪声，降低废气温度和减少废气向舱室内部的传热，更重要的是为了减少常规潜艇通气管状态柴油机水下排气所激起的水噪声和为了改善废气涡轮增压柴油机通气管状态高背压时的启动性能和变背压时的工作稳定性。文中还分析了该排气冷却消声器的其它一些功用。这些分析对发展我国潜用柴油机技术及常规潜艇采用废气涡轮增压技术有一定的指导意义。

Analysis of Functions of Exhaust Cooled Muffler for Exhaust-Gas Turbo-Charging Diesel Engine Used in Conventional Submarine

In this paper,some functions of the exhaust cooled mufflers of exhaust-gas turbocharging diesel engines of Germany's MTU396SB83 and MTU396SE84 are analyzed. In the opinion of the author, this device is used for attenuating the exhaust noise transmitted in air, decreasing the exhaust-gas temperature and isolating heat emission to engine room, specially attenuating the submerged exhaust noise transmited in water under snorkeling condition of the conventional submarine, improving the starting property of the exhaust-gas turbocharging engines under higher back-pressure condition and reinforcing the revolving steady degree under variable back-pressure condition. Some other functions of the exhaust cooled muffler are also analyzed in the paper. This analysis is of importance to development of the diesel engine technique and the exhaust-gas turbo-charging technique used in our conventional submarme.