Influence of Inlet Flows on the Flow Field in an Engine

Air velocities at several points near the spark plug location were measured using a laser Doppler anemometer (LDA) in a motoring internal combustion engine. This engine was equipped with three intake configurations: a standard valve in a standard port, a standard valve in a helical (swirl) port, and...

Full description

Saved in:
Bibliographic Details
Published in:SAE transactions 1987-01, Vol.96 (4), p.349-364
Main Authors: Saxena, Vijay, Rask, Rodney B.
Format: Article
Language:English
Subjects:
Applied sciences
Combustion
Cylinders
Engines
Engines and turbines
Exact sciences and technology
Flow distribution
Flow velocity
Internal combustion engines: gazoline engine, diesel engines, etc
Lasers
Mechanical engineering. Machine design
Speed
Turbulence
Velocity
Velocity measurement
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Air velocities at several points near the spark plug location were measured using a laser Doppler anemometer (LDA) in a motoring internal combustion engine. This engine was equipped with three intake configurations: a standard valve in a standard port, a standard valve in a helical (swirl) port, and a shrouded valve in a standard port. Both ensemble-averaged and cycle-resolved mean velocities were determined; this allows comparison of rms velocity fluctuation, cycle-resolved turbulence, and cycle-by-cycle variations in mean velocity. Frequency domain analysis of these components was also carried out. The main conclusion of this experimental study was that starting from a very low swirl situation (standard valve case), addition of a moderate amount of swirl (swirl port case) goes a long way towards improving cycle repeatability and increasing cycle-resolved turbulence. Increasing swirl even further (shrouded valve case) does not produce further dramatic improvements.
ISSN:0096-736X
2577-1531