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Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine

Gao, Jianbing, Tian, Guohong, Jenner, Phil and Burgess, Max (2020) Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine Journal of Cleaner Production, 121180.

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Abstract

Compact and high power density internal combustion engines are attracting much attention for the applications to hybrid vehicles, aiming at decreasing fuel consumption and exhaust emissions. A novel opposed rotary piston engine, whose cyclic period is 360° crank angle, is designed as the power of hybrid vehicles. Intake process of the internal combustion engines significantly affects brake thermal efficiency and rated power. In this paper, 3D simulation of a opposed rotary piston engine is conducted over different engine speeds of 3000 and 5000 RPM, in order to analyze the intake characteristics and pumping loss in the intake stroke. The results indicate that the in-cylinder pressure distributions change significantly in the intake process, which results from the variations of cylinder volume and fresh air flow rates. The minimum in-cylinder pressure is approximately 0.3 and 0.2 bar for 3000 and 5000 RPM, respectively, with the combustion chamber volume being ~0.04 L correspondingly. The maximum velocity of the fresh air in the intake process is higher than 150 m/s. Intake ports 2 and 3 dominate the mass flow of the combustion chambers, in addition, the contribution of mass flow from intake port 1 decreases with the engine speed. The pumping loss in the intake process increases from 1.35 to 4.39 kW when the engine speed increases from 3000 to 5000 RPM.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Gao, Jianbing
Tian, Guohongg.tian@surrey.ac.uk
Jenner, Phil
Burgess, Max
Date : 20 March 2020
Funders : EPSRC
DOI : 10.1016/j.jclepro.2020.121180
Copyright Disclaimer : © 2020 Elsevier Ltd. All rights reserved.
Projects : Impact Acceleration Account project
Uncontrolled Keywords : opposed rotary piston engine; intake characteristics; in-cylinder pressure distributions; pumping loss
Depositing User : James Marshall
Date Deposited : 25 Mar 2020 11:39
Last Modified : 25 Mar 2020 11:39
URI: http://epubs.surrey.ac.uk/id/eprint/854081

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