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Your search keyword '"Peter, Otchere"' showing total 3 results
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3 results on '"Peter, Otchere"'

2. Numerical investigation of direct injection stratified charge combustion in a natural gas-diesel rotary engine

Author

Chen Wei, Yangxian Liu, Hongjun Liu, Jianfeng Pan, Baowei Fan, and Peter Otchere

Subjects
Materials science, business.industry, 020209 energy, Mechanical Engineering, Nuclear engineering, Airflow, 02 engineering and technology, Building and Construction, Management, Monitoring, Policy and Law, medicine.disease_cause, Combustion, Rotary engine, Soot, Diesel fuel, General Energy, 020401 chemical engineering, Natural gas, 0202 electrical engineering, electronic engineering, information engineering, medicine, Ignition timing, 0204 chemical engineering, Combustion chamber, business
Abstract

To further improve the performance of diesel rotary engine, a novel natural gas-diesel rotary engine was proposed and studied in this paper. Based on a spray experimental setup, the diesel spray characteristics under diesel rotary engine working conditions were obtained and analyzed. Thereafter it was used to validate the spray model for diesel rotary engine modeling and simulation. The effect of different natural gas blending ratios on mixture formation and combustion process in the natural gas-diesel rotary engine were investigated. Simulation results showed that for fuel-air mixing process, the natural gas movement process was susceptible to the airflow motion. However, the diesel distribution range was obviously enlarged under the influence of high-speed unidirectional flow. At assisted ignition timing, the stratified distributed diesel made the combustion process mainly occured at the front and middle of the combustion chamber. Besides, the flame propagation speed was accelerated with natural gas blending ratio increasing, which effectively improved the total combustion rate. Compared to single-fuel mode, when natural gas blending ratio increased to 20%, the maximum combustion pressure increased by 24.17%. Meanwhile, soot and CO decreased obviously, but NO and CO2 also increased.

Published
2019

3. Biodiesel Spray Characteristics and a CFD Simulation Study of Injection Timing Effects on the Combustion Process in a Biodiesel-Fueled, Direct-Injection Rotary Engine

Author

Lu Yao, Jianfeng Pan, Li Jianxing, Chen Wei, Peter Otchere, and Baowei Fan

Subjects
Spray characteristics, 020301 aerospace & aeronautics, Cfd simulation, Biodiesel, Renewable Energy, Sustainability and the Environment, business.industry, Mixture formation, Fossil fuel, Energy Engineering and Power Technology, 02 engineering and technology, Alternative fuels, 01 natural sciences, Rotary engine, 010305 fluids & plasmas, 0203 mechanical engineering, Nuclear Energy and Engineering, Combustion process, 0103 physical sciences, Environmental science, business, Process engineering, Waste Management and Disposal, Civil and Structural Engineering
Abstract

Energy conservation is important in this modern era because of its high demand in transportation systems coupled with the depletion of fossil fuels. Biodiesel is thus an alternative fuel to...

Published
2020

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