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Numerical and Experimental Investigation on Carburettor Venturi Shape for a Two Wheeler
Technical Paper
2013-01-2803
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In India, for two-wheeler application, carburettor is the preferred fuel supply system for majority of the market, owing to its simplicity and low cost. With the regulations becoming stringent, carburettor internal structure requires modification. One of the important parameters is the venturi shape, which controls the air-fuel mixture supply to the engine. Venturi shape plays an important role in deciding the transient performance characteristics. In this study, a CFD analysis has been carried out to predict the pressure and velocity at the venture of the carburettor. Four different cross sections namely, circular, oval, trapezoidal and double D venturi shapes were selected. The geometric model of the carburettor was created and mesh refinements were carried out in critical regions. At part open throttle, CFD prediction of airflow rate with Trapezoidal venturi shape was found higher when compared to other venturi shapes. In actual vehicle trials, it was found that this venturi shape has a better acceleration time of 5% (0∼60 km) compared to circular shape. At wide open throttle, CFD predicted airflow rate with circular venturi shape was found better than other venturi shapes due to lesser restriction. In actual vehicle trials, this type of venturi cross section yielded 4% more power than the trapezoidal venturi carburetors. Finally it is concluded that oval shape is a good compromise for an optimum performance.
Authors
Citation
Sureshkumar, J., B, S., R, E., and Palani, S., "Numerical and Experimental Investigation on Carburettor Venturi Shape for a Two Wheeler," SAE Technical Paper 2013-01-2803, 2013, https://doi.org/10.4271/2013-01-2803.Also In
References
- Murugan , M. , Venumadhav , S. , Srinivasan , B. , and Govindarajan , S. Improving Flow Tolerances of Mass Produced Carburetors through Pilot System Design SAE Technical Paper 2009-01-1055 2009 10.4271/2009-01-1055
- Hendricks , T. , Shedd , T. , and Nellis , G. Numerical and Theoretical Fuel Flow Analysis of Small Engine Carburetor Idle Circuits SAE Technical Paper 2006-32-0111 2006 10.4271/2006-32-0111
- Arias , D. and Shedd , T. Numerical and Experimental Study of Fuel and Air Flow in Carburetors for Small Engines SAE Technical Paper 2004-32-0053 2004 10.4271/2004-32-0053
- Heywood , J. B. Internal Combustion Engine Fundamentals McGraw Hill Int. 1988
- Versteeg , K and Malalasekara W. An Introduction To Computational Fluid Dynamics -The Finite Volume Method Longman Group Ltd. 1995
- Computational Dynamics Limited STAR CD+ v 4.10 User and Methodology Manuals 2010