Marine engine

AccessScience ◽  
2015 ◽  
Keyword(s):  
Marine Engine

scholarly journals A Numerical Study on the Combustion Process and Emission Characteristics of a Natural Gas-Diesel Dual-Fuel Marine Engine at Full Load

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1342
Author(s):  
Van Chien Pham ◽  
Jae-Hyuk Choi ◽  
Beom-Seok Rho ◽  
Jun-Soo Kim ◽  
Kyunam Park ◽  
...  
Keyword(s):  
Natural Gas ◽  
Combustion Process ◽  
Simulation Software ◽  
Dual Fuel ◽  
Injection Timing ◽  
Emission Characteristics ◽  
Cylinder Pressure ◽  
Marine Engine ◽  
Full Load ◽  
Simulation Results

This paper presents research on the combustion and emission characteristics of a four-stroke Natural gas–Diesel dual-fuel marine engine at full load. The AVL FIRE R2018a (AVL List GmbH, Graz, Austria) simulation software was used to conduct three-dimensional simulations of the combustion process and emission formations inside the engine cylinder in both diesel and dual-fuel mode to analyze the in-cylinder pressure, temperature, and emission characteristics. The simulation results were then compared and showed a good agreement with the measured values reported in the engine’s shop test technical data. The simulation results showed reductions in the in-cylinder pressure and temperature peaks by 1.7% and 6.75%, while NO, soot, CO, and CO2 emissions were reduced up to 96%, 96%, 86%, and 15.9%, respectively, in the dual-fuel mode in comparison with the diesel mode. The results also show better and more uniform combustion at the late stage of the combustions inside the cylinder when operating the engine in the dual-fuel mode. Analyzing the emission characteristics and the engine performance when the injection timing varies shows that, operating the engine in the dual-fuel mode with an injection timing of 12 crank angle degrees before the top dead center is the best solution to reduce emissions while keeping the optimal engine power.

Development of Surface Welding Method for Surface Temperature Measurement of an IC Engine's Combustion Chamber

2006 ◽  
Vol 306-308 ◽  
pp. 453-458
Author(s):  
Hyung Man Kim ◽  
Kap Seung Choi ◽  
Chang Ho Kim ◽  
Dong Jae Lee
Keyword(s):  
Temperature Measurement ◽  
Combustion Engine ◽  
Marine Engine ◽  
Combustion Gas ◽  
Welding Method ◽  
Pull Out ◽  
Engine Cylinder ◽  
Temperature Combustion ◽  
Surface Welding ◽  
High Temperature Combustion

In the recent development of internal combustion engine, considerable increase in speed and power has been accomplished. This achievement, however, brought up various problems due to the excessive temperature of engine parts, which becomes a crucial factor in engine durability. In the present paper, temperature measurement of a marine engine was investigated experimentally. The adapter is made to pull out a thermocouple through the safety valve hole of the engine. The thermocouple is welded on the surface of the cylinder cover to measure the average temperatures of the engine cylinder cover. Ceramic adhesive was used for preventing the affect of high temperature combustion gas. The cylinder cover temperatures of the engine were measured by means of surface welding method. As a result, average temperatures of the engine cylinder cover were successfully in the range of 85~335oC. In the present study, the surface welding method was confirmed from the temperature measurement of cylinder cover in an experimental engine, and can be applied to large-sized marine engine without damage.

4934903 Oil discharge detecting device for marine engine

1990 ◽  
Vol 21 (11) ◽  
pp. 551
Author(s):  
Masafum Sougawa
Keyword(s):  
Marine Engine

Marine engine external exhaust noise suppressor with swim platform

1991 ◽  
Vol 90 (4) ◽  
pp. 2216-2216
Author(s):  
George Von Widmann ◽  
Robert V. Parenti
Keyword(s):  
Marine Engine ◽  
Exhaust Noise
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