Towards distributed combustion for ultra low emission using swirling and non-swirling flowfields

Ahmed E.E. Khalil and Ashwani K. Gupta

Applied Energy, 2014, vol. 121, issue C, 132-139

Abstract: Colorless Distributed Combustion (CDC) has been demonstrated to provide ultra-high combustion intensity, increased performance in terms of ultra-low emissions, uniform thermal field, combustion stability and enhanced efficiency. CDC has been examined under both swirling and non-swirling configurations using different injection velocities to seek improved distributed combustion. CDC performance has also been evaluated at different operational temperatures and equivalence ratios. The results are analyzed to determine the key factors that affect distributed combustion regime. Data showed key parameters for distributed combustion include recirculation ratio (defined as the ratio of the recirculated mass in the combustor to the mass of the fresh mixture), flow injection velocity, fuel injection scheme, and geometrical configuration for the operating condition. The results showed that increase in recirculation ratio and air injection velocity foster distributed reaction conditions. Fuel injection location and separation distance between air and fuel injection points played a critical role on fuel mixing and the resulting emissions. Impact of temperature and pressure varied with the operating equivalence ratio. A hybrid combination of the above parameters provides distribution index (DI) that reveals how well the chemical reaction zone is distributed within the combustion regime.

Keywords: Colorless Distributed Combustion (CDC); Ultra-low NOx and CO emission; Gas turbine combustion; Swirling and non-swirling CDC; Distribution index (DI) (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261914001111
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:121:y:2014:i:c:p:132-139

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2014.01.081

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().