Study of Induction Tumble by Particle Tracking Velocimetry in a 4-Valve Engine

Paper #:
  • 912376

Published:
  • 1991-10-01
Citation:
Rönnbäck, M., Le, W., and Linna, J., "Study of Induction Tumble by Particle Tracking Velocimetry in a 4-Valve Engine," SAE Technical Paper 912376, 1991, https://doi.org/10.4271/912376.
Pages:
17
Abstract:
The angular momentum of a tumble vortex occurring inside a 4-valve spark ignition engine was measured by particle tracking velocimetry, PTV. A cylindrical glass liner was designed for a single cylinder motored engine. Light-scattering particles and a laser light sheet, directed through the axis of the cylinder, were used to observe the simultaneous flow field. Three different intake port designs were used in this study. The in-cylinder tumbling motions were measured and the tumble ratios were calculated. The intake configurations were also visualized and measured with PTV in a steady flow rig, at a fixed valve lift. In addition, the results were compared with measurements from a conventional steady flow rig which measures the angular momentum flux with a torque-meter, and with laser doppler measurements, LDV, in a motored engine.All four techniques indicated clearly the qualitative difference between the ability of the intake ports to produce an in-cylinder tumbling motion. Quantitative numbers of angular momentum could be drawn from the PTV-results in the motored engine and from the conventional flow rig, while the LDV-measurements gave significant information about turbulence characteristics.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2018-02-20