THE EFFECT OF AN ELECTRIC FIELD ON HEAT TRANSFER FROM A VERTICAL PLATE IN VARIOUS GASES OVER A RANGE OF PRESSURES.
Abstract
The object was to study the effect an electric field has on heat transfer rate from a vertical flat plate in air, nitrogen, and carbon dioxide over a range of pressures. Equipment was designed and tests performed with a Mach-Zehnder type interferometer to obtain basic data on the effect of pressure on heat transfer coefficient at constant electrode-to-plate currents for vertical stations along the plate in air, nitrogen, and carbon dioxide. Correlations are obtained from these data and an empirical equation is derived relating heat transfer rate as linear functions of pressure and electrode-to-plate power. The accuracy of the equation is checked by the elimination of pressure as a parameter in the equation and plotting all of the data points obtained on one graph of heat transfer rate versus electrode-to-plate power. A dimensionless plot is also presented of Nusselt number versus the product of the Prandtl and Grashof numbers showing the effect of pressure on heat transfer coefficient at constant electrodeto-plate current. A digital computer was used to process the data taken with the interferometer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1964
- Accession Number
- AD0610174
Entities
People
- Richard James O'brien
Organizations
- Air Force Institute of Technology