Influence of Piston Bowl Shape and Number of Holes in Injector on Spray, Combustion and Emissions of a Diesel Engine: a Numerical Research
Shahanwaz Khan1, RajsekharPanua2, Probir Kumar Bose3

1Shahanwaz Khan, Department of Mechanical Engineering, Aliah University, New Town, Kolkata (West Bengal), India.
2RajsekharPanua, Department of Mechanical Engineering, National Institute of Technology, Agartala (Tripura), India.
3Probir Kumar Bose, Department of Mechanical Engineering, National Institute of Technology, Agartala (Tripura), India.
Manuscript received on 02 June 2019 | Revised Manuscript received on 27 June 2019 | Manuscript Published on 04 July 2019 | PP: 44-51 | Volume-8 Issue-1S4 June 2019 | Retrieval Number: A10090681S419/2019©BEIESP
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Abstract: Present study considers numerical simulation to explore the combine influence of piston bowl shape and number of holes on spray, fuel combustion and pollutant emissions of a diesel engine. The fluid flow behavior in combustor is extensively depends on piston bowl shape that affects the air fuel mixing, combustion and emissions. The number of holes in injector nozzle is a crucial constraint that influences the distribution of the fuel inside the combustor. To study the effect of piston bowl profile, three combustion chambers have been chosen for the same bowl volume and compression ratio of 17.5. The injector used for the study varied number of holes from 3 to 6 and the size of holes varied to maintain total area of nozzle holes constant. The investigation has been done on a compression ignition engine using the commercial CFD code AVL FIRE. The predicted results disclose that increasing number of holes considerably enhances combustion and improve emissions from piston bowls and the TRCC piston bowl predicts better performance.
Keywords: Combustion, Spray, Swirl, Turbulence.
Scope of the Article: Operational Research