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  The Ultra-Lean Partially Stratified Charge Approach to Reducing Emissions in Natural Gas Spark-Ignited Engines

Bartolucci, L., Chan, E., Cordiner, S., Evans, R., Mulone, V. (2019): The Ultra-Lean Partially Stratified Charge Approach to Reducing Emissions in Natural Gas Spark-Ignited Engines. - In: Srinivasan, K. K., Agarwal, A. K., Krishnan, S. R., Mulone, V. (Eds.), Natural Gas Engines: For Transportation and Power Generation, (Energy, Environment, and Sustainability), Singapore : Springer, p. 29-63.
DOI: http://doi.org/10.1007/978-981-13-3307-1_3



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Item Permalink: Version Permalink: http://publications.iass-potsdam.de/pubman/item/escidoc:3711889:1
Genre: Book Chapter

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 Creators:
Bartolucci, L.1, Author
Chan, E.C.1, Author
Cordiner, S.1, Author
Evans, R.L.2, Author
Mulone, V.1, Author
Affiliations:
1External Organizations, escidoc:persistent22              
2IASS Institute for Advanced Sustainability Studies Potsdam, escidoc:96022              

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Free keywords: Natural gas combustion, Spark ignition (SI) engine, Lean combustion, Stratified charge, High efficiency, Low emissions
 Abstract: Lean-burn natural gas engines can be used to reduce exhaust emissions significantly. However, as the mixture is leaned out, the occurrence of extinction and incomplete combustion increases, resulting in poor performance and stability, as well as elevated levels of unburned hydrocarbon (UHC) and nitrogen oxides (NOx) emissions. The partially stratified charge (PSC) method can be used to mitigate these issues, while extending the lean misfire limit (LML) beyond its equivalent, homogeneous level. In this chapter, the PSC ignition and combustion processes are examined following a comprehensive experimental and numerical approach. Experiments are conducted in an idealized PSC configuration, using a constant volume combustion chamber (CVCC), to identify the principle enabling mechanisms of the PSC methodology. Engine tests conducted in a single-cylinder research engine (SCRE) demonstrate the feasibility of various PSC implementations in improving performance and emission characteristics in real-world settings. Complementary numerical analyses for the CVCC are obtained through large eddy simulations (LES), while Reynolds-averaged Navier–Stokes (RANS) simulations are conducted for SCRE with reduced chemical kinetics. The corresponding simulated results provide additional insights in characterizing the effect of fuel stratification on flame kernel maturation and flame propagation, the interplay between chemistry and turbulence at different overall air–fuel ratios, as well as formation of major pollutant species.

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Language(s): eng - English
 Dates: 2018-112019
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Natural Gas Engines: For Transportation and Power Generation
Source Genre: Book
 Creator(s):
Srinivasan, Kalyan Kumar, Editor
Agarwal, Avinash Kumar, Editor
Krishnan, Sundar Rajan, Editor
Mulone, Vincenzo, Editor
Affiliations:
-
Publ. Info: Singapore : Springer
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 29 - 63 Identifier: ISBN: 978-981-13-3306-4
ISBN: 978-981-13-3307-1
DOI: http://doi.org/10.1007/978-981-13-3307-1

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Title: Energy, Environment, and Sustainability
Source Genre: Series
 Creator(s):
-
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-
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -