Effects of Intake Port Geometry on Large Scale In-Cylinder Flows

Format:

Conference/Event

Author/Creator:

Church, William, author.

Conference Name:

International Congress & Exposition (1998-02-23 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1998

Summary:

A set of experiments has been performed which were aimed at quantifying the effects of specific intake port geometry changes on large-scale in-cylinder motions. Using a modular engine with replaceable intake port blocks, 3 different intake ports were used and results obtained at 3 crank angles: BDC, 90° before TDC of compression, and at TDC of compression. For each port, in-cylinder flows were quantified using a pulsed laser and high-speed imager. The resulting images were analyzed using a particle-tracking scheme.The results of the experiments indicate that there are significant differences among the flows produced by the ports, particularly at BDC. Nearer TDC, the differences among the flows diminish, but some differences in velocity and vorticity scale and distribution remain.Tumble ratios are shown, using a variety of tumble ratio calculation methods. In general, the methods give similar results showing moderate change in tumble from BDC to 90° BTDC, then a significant decrease to TDC

Notes:

Vendor supplied data

Publisher Number:

980484

Access Restriction:

Restricted for use by site license