Development of a 3D CFD model to investigate the effect of the mixing quality on the CNG-diesel engine performance

Yusaf, Talal and Yusoff, Mohammed Zamri (2000) Development of a 3D CFD model to investigate the effect of the mixing quality on the CNG-diesel engine performance. In: The International Conference and Exhibition and Natural Gas Vehicles, 17-19 Oct 2000, Yokohama, Japan.


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In this paper Computational Fluid Dynamics (CFD) analysis software (CFD-ACE) is used to investigate flow
behaviour of methane and air in a CNG-air mixer to be used for CNG-Diesel dual fuel stationary diesel
engine. The results of the simulation show that, the eight-hole mixer give superior performance as compared
to the four-hole mixer. Further analysis were then done on the eight-hole mixer to investigate the effect of
engine speed on the mass flow rate of CNG and λ (ratio of actual to stochiometric air fuel ratio). The second
half of this paper represents a compression results between the performances of a single cylinder research
Compression Ignition CI engine; i) fuelled with Compressed Natural Gas-diesel system and conventional CI
engines fuelled by conventional diesel. The engine was equipped with the simulated 8 holes Venture mixer,
the results shows that there is significant reduction of the exhaust gas emission components such as NOx, CO
and CO2. in comparison to the conventional diesel engine. This work shows that by using dual fuel system
(with Venturi mixer) NOx, CO and CO2 concentrations in the exhaust gases were, on average, reduced by
54%, 59% and 31% respectively. The average power output from the engine operating at dual fuel was 10%
higher than that operating on diesel over the tested range of engine speeds.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 11 Oct 2007 00:47
Last Modified: 02 Jul 2013 22:38
Uncontrolled Keywords: CFD Engine Mixer
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090405 Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies

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