Optimizing the Exhaust System of Marine Diesel Engines to Improve Low-speed Performances and Cylinder Working Conditions  

作　　者：Sheng Liu Ling Leng Wenjie Zhou Lei Shi 

机构地区：[1]Science and Technology on Diesel Engine Turbocharging Laboratory,China North Engine Research Institute,Tianjin,300400,China [2]Key Laboratory for Power Machinery and Engineering of Ministry of Education,College of Mechanical and Power Engineering,Shanghai Jiaotong University,Shanghai,200240,China

出　　处：《Fluid Dynamics & Materials Processing》2021年第4期683-695,共13页流体力学与材料加工（英文）

基　　金：the High-Tech Ship Scientific Research Project[MC-201501-D01-01].

摘　　要：Proper design of exhaust systems in marine high-power turbocharged diesel engines can contribute to improve the low-speed performance of these engines and make the working conditions of the cylinders more uniform.Here a high-power marine 16-cylinder V-type turbocharged diesel engine is simulated using the GT-Power software.The results reveal the differences induced by different exhaust system structures,such as an 8-cylinder-inpipe exhaust system with single/double superchargers and a 4-cylinder-in-pipe exhaust system with a single supercharger.After a comparative analysis,the 8-cylinder type with double superchargers is determined to be the optimal solution,and the structure of the exhaust system is further optimized.The simulations show that the optimized maximum exhaust temperature difference among cylinders is reduced by 66%.Finally,the simulation results and the optimized performance of the designed exhaust system are verified through experiments.

关 键 词：Exhaust system low-speed performance cylinder uniformity diesel engine 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]