Investigation on the performance of an IDI engine using a novel dual swirl combustor

Indirect injection of Diesel fuel using swirl chambers is an interesting research option ever since the concept was coined by the researchers across the globe. In this typical concept, fuel is sprayed into the swirl chamber incorporated in the cylinder head of engine for primary combustion for the obvious benefit of getting lower NOx emissions keeping a low injection pressure. Typical systems use a single swirl chamber for this purpose. In this study, a novel design of swirl chamber which can produce dual swirl leading to higher turbulence, better mixing of compressed air and fuel is proposed and tested. Comparative performance and exergy analysis are done with a single swirl chamber and the newly developed dual swirl chamber. Performance testing on both the single and novel dual swirl chamber IDI engine showed that at higher loads both designs have equally good. At a load of 10kgf the BSFC and Brake thermal efficiency is identical and experimental results showed that dual swirl has lower NOx emissions, CO emission but, at the penalty of slightly higher SFC (as compared to single swirl chamber) respectively by 11.18%, is 4.47% and 0.36%. The exergy analysis of the novel dual swirl chamber and the single swirl chamber shows that the destroyed exergy of DSC is 5.65% higher compared to SSC, though input availability is more in DSC. This is the area where further research work must be done, to minimize it. Copyright (C) 2022 Elsevier Ltd. All rights reserved.