关键词: 高速船, 湿式排气, 柴油机, 设计方法

Abstract: The exhaust pipe of the diesel engine on board is divided into dry exhaust and wet exhaust according to whether the exhaust gas is discharged together with the cooling water. Dry exhaust is not only easy to blacken the hull shell and deck equipment, but also causes the higher exhaust pipe temperature (up to 400~600℃) and serious noise pollution. Wet exhaust has the advantages of the low exhaust temperature (40~60℃), light weight, low noise and environmental protection. It is therefore suitable for those high-speed ships with appearance concerns, compact machinery space, sensitivity of equipment weight and higher requirements of noise and infrared radiation, such as patrol ships and yachts. This article introduces the arrangement scheme and the design method of the wet exhaust system (cooling water mixed with diesel engine exhaust gas) of the main engine in high-speed ships, and the issues to be taken into account in the arrangement and installation. It can provide reference for the design of civil high speed ship.

Key words: high speed ship, wet exhaust, diesel engine, design method