Intake port flow performance plays a substantial role in determining the volumetric efficiency and in-cylinder charge motion of a spark-ignited engine. Steady-state flow bench and motored engine flow computational fluid dynamics (CFD) simulations were carried out to bridge these two approaches for the evaluation of port flow and charge motion (such as discharge coefficient, swirl/tumble ratios (SR/TR)). The intake port polar velocity profile and polar physical clearance profile were generated to evaluate the port performance based on local flow velocity and physical clearance in the valve-seat region. The measured data were taken from standard steady-state flow bench tests of an intake port for validation of CFD simulations. It was reconfirmed that the predicted discharge coefficients and swirl/tumble index (SI/TI) of steady flow bench simulations have a good correlation with those of motored engine flow simulations. Polar velocity profile is strongly affected by polar physical clearance profile. The polar velocity inhomogeneity factor (IHF) correlates well with the port discharge coefficient, swirl/tumble index. Useful information can be extracted from local polar physical clearance and velocity, which can help for intake port design.
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July 2017
Research-Article
In-Cylinder Flow Correlations Between Steady Flow Bench and Motored Engine Using Computational Fluid Dynamics
Ronald O. Grover, Jr.,
Ronald O. Grover, Jr.
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
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Paul Najt
Paul Najt
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
Search for other works by this author on:
Xiaofeng Yang
Tang-Wei Kuo
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
Orgun Guralp
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
Ronald O. Grover, Jr.
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
Paul Najt
GM R&D,
Pontiac, MI 48340
Pontiac, MI 48340
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received October 19, 2016; final manuscript received December 9, 2016; published online February 23, 2017. Editor: David Wisler.
J. Eng. Gas Turbines Power. Jul 2017, 139(7): 072802 (8 pages)
Published Online: February 23, 2017
Article history
Received:
October 19, 2016
Revised:
December 9, 2016
Citation
Yang, X., Kuo, T., Guralp, O., Grover, R. O., Jr., and Najt, P. (February 23, 2017). "In-Cylinder Flow Correlations Between Steady Flow Bench and Motored Engine Using Computational Fluid Dynamics." ASME. J. Eng. Gas Turbines Power. July 2017; 139(7): 072802. https://doi.org/10.1115/1.4035627
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