HEAT TRANSFER IN OSCILLATING FLOW
Abstract
A brief summary is provided of an extensive research into heat transfer with oscillating flow. Significant heat transfer increases were demonstrated without combustion. Measurements were made in a turbulent, unsteady environment provided within a duct which was placed in longitudinal mode resonance by a siren arrangement. Importance of the velocity antinode locations and the degree of flow reversal in the enhancement of heat transfer was indicated. Measurement techniques utilized a heated strip, axially traversing the tube between node and antinode locations; a steam-heated axially- segmented test section which covered more than one wave length of the imposed oscillations; and constant-temperature hot-wire probe surveys of the core and boundary layer in both the steady-state and unsteady duct environments. The mechanism which best correlated the experimental measurements and analyses was the effect of the oscillations on the turbulence exchange properties, while viscous dissipation and acoustic streaming appeared to be unimportant for many cases of interest.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1967
- Accession Number
- AD0664303
Entities
People
- David T. Harrje
Organizations
- Princeton University