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A numerical study of a compression ignition engine operating with constant volume combustion phase: Effects of constant volume phase on combustion performance and emissions

A numerical study of a compression ignition engine operating with constant volume combustion phase: Effects of constant volume phase on combustion performance and emissions
A numerical study of a compression ignition engine operating with constant volume combustion phase: Effects of constant volume phase on combustion performance and emissions
A detailed numerical study is carried out to investigate the performance of a turbocharged compression ignition engine operating under a novel combustion strategy in which fuel injection and most of the combustion occur at a constant volume. Simulations have been performed using URANS based modelling approach along with several other sub-models. A detailed validation of the CFD model has been carried out using data from a conventional crank engine.

A parametric study has been performed to investigate the effects of the duration and timing of the constant volume combustion phase (CVCP) on the engine’s thermal efficiency and emissions, with comparisons against the conventional engine. Much higher in-cylinder pressures and temperatures are observed in the CVCP strategy.

The results demonstrate that the CVCP strategy is capable of yielding reduced gross indicated specific fuel consumptions of up to 20% and far lower CO2 and soot emissions but incurs unacceptable increase to nitrogen oxide emissions. However, it was found that a combination of exhaust gas recirculation and improved fuel injection methods can counter the increased nitrogen oxide emissions under the CVCP strategy, while still maintaining the improved engine performance and low carbon-based emissions.
Compression ignition engine, Constant volume combustion, Emission reduction methods, Engine performance, Numerical modelling
0016-2361
1-15
Ramsay, C.J
53b67448-3525-4d4f-9db8-bfa1585ee7a6
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Fairney, W.
c01964ca-8313-4560-b242-b63e9a467557
Vaughan, N.
e3111a1f-10dc-4055-8e9e-89444af10fc2
Ramsay, C.J
53b67448-3525-4d4f-9db8-bfa1585ee7a6
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Fairney, W.
c01964ca-8313-4560-b242-b63e9a467557
Vaughan, N.
e3111a1f-10dc-4055-8e9e-89444af10fc2

Ramsay, C.J, Ranga Dinesh, K.K.J, Fairney, W. and Vaughan, N. (2020) A numerical study of a compression ignition engine operating with constant volume combustion phase: Effects of constant volume phase on combustion performance and emissions. Fuel, 280 (118657), 1-15, [118657]. (doi:10.1016/j.fuel.2020.118657).

Record type: Article

Abstract

A detailed numerical study is carried out to investigate the performance of a turbocharged compression ignition engine operating under a novel combustion strategy in which fuel injection and most of the combustion occur at a constant volume. Simulations have been performed using URANS based modelling approach along with several other sub-models. A detailed validation of the CFD model has been carried out using data from a conventional crank engine.

A parametric study has been performed to investigate the effects of the duration and timing of the constant volume combustion phase (CVCP) on the engine’s thermal efficiency and emissions, with comparisons against the conventional engine. Much higher in-cylinder pressures and temperatures are observed in the CVCP strategy.

The results demonstrate that the CVCP strategy is capable of yielding reduced gross indicated specific fuel consumptions of up to 20% and far lower CO2 and soot emissions but incurs unacceptable increase to nitrogen oxide emissions. However, it was found that a combination of exhaust gas recirculation and improved fuel injection methods can counter the increased nitrogen oxide emissions under the CVCP strategy, while still maintaining the improved engine performance and low carbon-based emissions.

Text
JFUE-D-20-02386R1-Accepted-Manuscript - Accepted Manuscript
Restricted to Repository staff only until 12 July 2022.
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More information

Accepted/In Press date: 6 July 2020
e-pub ahead of print date: 13 July 2020
Published date: 15 November 2020
Keywords: Compression ignition engine, Constant volume combustion, Emission reduction methods, Engine performance, Numerical modelling

Identifiers

Local EPrints ID: 442426
URI: http://eprints.soton.ac.uk/id/eprint/442426
ISSN: 0016-2361
PURE UUID: a9dc1854-7219-4cd6-bdba-7a19a8fbb07d
ORCID for K.K.J Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

Catalogue record

Date deposited: 15 Jul 2020 16:31
Last modified: 26 Nov 2021 03:00

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Contributors

Author: C.J Ramsay
Author: W. Fairney
Author: N. Vaughan

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