The purpose of this study is to investigate the influence of re-entrant bowl geometry on both engine performance and combustion efficiency in a direct injection (DI), turbocharged diesel engine for heavy-duty applications. The piston bowl design is one of the most important factors that affect the air–fuel mixing and the subsequent combustion and pollutant formation processes in a DI diesel engine. The bowl geometry and dimensions, such as the pip region, bowl lip area, and toroidal radius, are all known to have an effect on the in-cylinder mixing and combustion processes. Based on the idea of enhancing diffusion combustion at the later stage of the combustion period, three different bowl geometries, namely, bowl 1 (baseline), bowl 2, and bowl 3 were selected and investigated. All the other relevant parameters, namely, compression ratio, maximum diameter of the bowl, squish clearance and injection rate were kept constant. A commercial CFD code STAR-CD was used to model the in-cylinder flows and combustion process, and experimental results of the baseline bowl were used to validate the numerical model. The simulation results show that, bowl 3 enhance the turbulence and hence results in better air-fuel mixing among all three bowls in a DI diesel engine. As a result, the indicated specific fuel consumption and soot emission reduced although the emission is increased owing to better mixing and a faster combustion process. Globally, since the reduction in soot is larger ( as regards baseline) than the increase in ( as regards baseline), it can be concluded that bowl 3 is the best trade-off between performance and emissions.
Skip Nav Destination
e-mail: venkateswaran.ps@gmail.com
e-mail: nagarajan1963@annauniv.edu
Article navigation
December 2010
Research Papers
Effects of the Re-Entrant Bowl Geometry on a DI Turbocharged Diesel Engine Performance and Emissions—A CFD Approach
S. Pasupathy Venkateswaran,
S. Pasupathy Venkateswaran
Department of Mechanical Engineering,
e-mail: venkateswaran.ps@gmail.com
Anna University Chennai
, Chennai, Tamilnadu 600 025, India
Search for other works by this author on:
G. Nagarajan
G. Nagarajan
Department of Mechanical Engineering,
e-mail: nagarajan1963@annauniv.edu
Anna University Chennai
, Chennai, Tamilnadu 600 025, India
Search for other works by this author on:
S. Pasupathy Venkateswaran
Department of Mechanical Engineering,
Anna University Chennai
, Chennai, Tamilnadu 600 025, Indiae-mail: venkateswaran.ps@gmail.com
G. Nagarajan
Department of Mechanical Engineering,
Anna University Chennai
, Chennai, Tamilnadu 600 025, Indiae-mail: nagarajan1963@annauniv.edu
J. Eng. Gas Turbines Power. Dec 2010, 132(12): 122803 (10 pages)
Published Online: August 30, 2010
Article history
Received:
June 11, 2009
Revised:
February 10, 2010
Online:
August 30, 2010
Published:
August 30, 2010
Citation
Venkateswaran, S. P., and Nagarajan, G. (August 30, 2010). "Effects of the Re-Entrant Bowl Geometry on a DI Turbocharged Diesel Engine Performance and Emissions—A CFD Approach." ASME. J. Eng. Gas Turbines Power. December 2010; 132(12): 122803. https://doi.org/10.1115/1.4001294
Download citation file:
Get Email Alerts
Image-based flashback detection in a hydrogen-fired gas turbine using a convolutional autoencoder
J. Eng. Gas Turbines Power
Fuel Thermal Management and Injector Part Design for LPBF Manufacturing
J. Eng. Gas Turbines Power
An investigation of a multi-injector, premix/micromix burner burning pure methane to pure hydrogen
J. Eng. Gas Turbines Power
Related Articles
Comparisons of Diesel PCCI Combustion Simulations Using a Representative Interactive Flamelet Model and Direct Integration of CFD With Detailed Chemistry
J. Eng. Gas Turbines Power (January,2007)
Applying the Representative Interactive Flamelet Model to Evaluate the Potential Effect of Wall Heat Transfer on Soot Emissions in a Small-Bore Direct-Injection Diesel Engine
J. Eng. Gas Turbines Power (October,2002)
Computationally Efficient Whole-Engine Model of a Cummins 2007 Turbocharged Diesel Engine
J. Eng. Gas Turbines Power (February,2010)
1D Engine Simulation of a Small HSDI Diesel Engine Applying a Predictive Combustion Model
J. Eng. Gas Turbines Power (January,2008)
Related Proceedings Papers
Related Chapters
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Determination of the Effects of Safflower Biodiesel and Its Blends with Diesel Fuel on Engine Performance and Emissions in a Single Cylinder Diesel Engine
International Conference on Software Technology and Engineering, 3rd (ICSTE 2011)
A Simple Carburetor
Case Studies in Fluid Mechanics with Sensitivities to Governing Variables