A CFD (computational fluid dynamics) study for optimization of gas injector orientation for performance improvement of a dual-fuel diesel engine

Venkateswarlu Chintala and K.A. Subramanian

Energy, 2013, vol. 57, issue C, 709-721

Abstract: A CFD (computational fluid dynamics) study was conducted on a diesel engine (7.4kW) under dual-fuel mode (diesel–CNG (compressed natural gas), and diesel–H2 (hydrogen)) for optimization of gas injector orientation (location and angle). The critical distance of gas injector between intake valve axis and injector mounting point is found to be 248.4mm, 219.3mm, and 96.8mm at 1500rpm, 1800rpm, and 5000rpm at 2bar gas injection pressure. If gas injector is mounted beyond the critical point, the injected gas fuel cannot reach completely into the engine cylinder during suction stroke that may result to power drop and high chance of backfiring due to the gas accumulation. The optimum injector angle at the optimum location is found to be 0° and 225° with reference to axis of intake manifold based on better mixture formation and higher thermal efficiency as compared to other angles. The experimental results have good agreement with simulation results as BTE (brake thermal efficiency) increased from 27.3% with 45° to 28.9% with 225° injector's angle at distance of 245mm. A methodology for optimization of gas injector orientation for better thermal efficiency is emerged from this study. This study could also be applicable to other fluids including EGR (exhaust gas recirculation).

Keywords: Dual-fuel engine; Gas injector orientation; CNG (compressed natural gas) and H2 (hydrogen); CFD (computational fluid dynamics); Mixture formation; BTE (brake thermal efficiency) (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544213005070
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:energy:v:57:y:2013:i:c:p:709-721

DOI: 10.1016/j.energy.2013.06.009

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

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