Two-stage Combustion Strategy for Reducing NOx Emissions in a Compression Ignition Engine Hanyang Univ

Format:

Book

Conference/Event

Author/Creator:

Oh, Yunjung, author.

Contributor:

Jeong, Kyusoo

Kim, Daesik

Kim, Sayop

Lee, Chang Sik

Lee, Donggon

Park, Sungwook

Conference Name:

Small Engine Technology Conference & Exposition (2011-11-08 : Sapporo, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Tokyo, JAPAN Society of Automotive Engineers of Japan 2011

Summary:

This paper describes the effects of two stage combustion strategy on the engine performance and the exhaust emission characteristics in a compression ignition engine. The two-stage combustion strategy targets reduction of NOx emissions by decreasing oxygen concentration for second stage combustion. Thus, the first injection was provided in order to consume in-cylinder oxygen, rather than generate power.A multi-dimensional CFD code was utilized to predict engine performance and emission characteristics. For the accurate and efficient computational calculation of ignition and combustion characteristics of diesel fuel, the reduced n-heptane mechanism was used in this study. The calculation for two-stage combustion was performed after validating against the experimental result. The KH-RT breakup model and gas-jet model was applied for the prediction of spray behavior and characteristics. To calculate the ignition and combustion process, CHEMKIN II [1] code was used. This mechanism was composed of 30 species and 65 reactions.It was revealed that the peak combustion pressure and the peak heat release rate in two-stage combustion strategy were reduced. It was due to the separate fuel injection and combustion. In the exhaust emission characteristics, two-stage combustion significantly reduced the nitrogen oxides (NOx) emission

Notes:

Vendor supplied data

Publisher Number:

2011-32-0659

Access Restriction:

Restricted for use by site license