Measurements of the Spatial Distribution and Engine Speed Dependence of Turbulent Air Motion in an I.C. Engine Sandia Labs

Format:

Conference/Event

Author/Creator:

Witze, Peter O., author.

Conference Name:

1977 International Automotive Engineering Congress and Exposition (1977-02-28 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1977

Summary:

A hot-wire anemometer was used to study the air motion in a motored i.c. engine. Measurements were made of the mean velocity, turbulence intensity, and integral scales of turbulence. The engine speed was varied from 500 to 2500 rpm, and the hot-wire probe was traversed both across the combustion chamber clearance volume and down into the piston sweep volume. The latter traverse was accomplished by probe-accommodating "wells" built into the piston crown, which were subsequently shown to severely disrupt the flow during the compression and expansion strokes.The results show the mean velocity and turbulence intensity to vary linearly with engine speed, and the turbulence scales to be a function of geometry only. The structure of turbulence was found to be inhomogeneous in the clearance volume and the upper portion of the sweep volume

Notes:

Vendor supplied data

Publisher Number:

770220

Access Restriction:

Restricted for use by site license