Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions
نویسندگان
چکیده
Under the stress of environmental pollutions and fossil fuel consumption caused by on-road transport, hybrid vehicles are attracting much attention. Opposed rotary piston (ORP) engines a promising power source for vehicles, due to their compact designs high density. In this paper, combustion emission characteristics turbocharged ORP engine fuelled with hydrogen were investigated evaluate overall performance engine. The results indicated that volumetric efficiency was higher than 89.0% all given cases. Peak in-cylinder pressure in range 51.0 ~ 69.0 bar; 4000 RPM scenario had maximum value, being benefitted from intake temperature pressure, efficiency. Combustion duration ranged 27 43° crank angle (CA), phase happened at 7.5 13°CA after top dead centre (TDC). nitrogen monoxide (NO) formation rates corresponding 5 TDC; accumulated NO decreased slightly reaching peak value low speed conditions. Discharge start exhaust stroke 6.0 bar, especially 5000 case whose approximately 11.0 bar. This presented excellent torque characteristics, density 104.0 kW·L−1 which four-stroke reciprocating gasoline.
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ژورنال
عنوان ژورنال: Fuel
سال: 2021
ISSN: ['0016-2361', '1873-7153']
DOI: https://doi.org/10.1016/j.fuel.2020.119210