Open Access

ARTICLE

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

by Sheng Liu¹, Ling Leng², Wenjie Zhou², Lei Shi^2,*

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

* Corresponding Author: Lei Shi. Email:

Fluid Dynamics & Materials Processing 2021, 17(4), 683-695. https://doi.org/10.32604/fdmp.2021.013575

Received 13 August 2020; Accepted 02 March 2021; Issue published 17 May 2021

Abstract

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-in-pipe 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.

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Keywords

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