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Simulation of injection angles on combustion performance using multiple injection strategy in HSDI diesel engine by CFD

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Author(s): K. Bala showry, | Dr.A.V.Sita Rama Raju

Journal: International Journal of Engineering and Technology
ISSN 0975-4024

Volume: 2;
Issue: 4;
Start page: 234;
Date: 2010;
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Keywords: Split injection | Dwell | Start of injection | Duration of injection | Spray cone angle EGR | CFD

ABSTRACT
This research focused on the effects cone angle using split injection on combustion in a direct injection diesel engine. Simulation has been carried on two different cone angles 150and 70degrees. Duration of injection, starting of injection, dwell, and spray cone angle and nozzle hole diameter are some of the important parameters which improves the engine performance consequently pollution levels getsdecreased. As far as cone angle is concerned the cone angle should be optimum and nozzle diameter should be optimized so as to achieve maximum efficiency for an optimum pressure. Even though EGR plays amajor role in reducing pollution levels to some extent in terms of NOx and soot, in this work EGR has been considered as zero percentage because as EGR increases particulate matter. It also dilutes the freshcharge which has been taken inside the engine. Split injection takes care of reducing particulate matter without increase in NOx levels .In this research simulation for two different cone angles have showngood agreement with experimental results.
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