Accession Number:

ADA202714

Title:

Corona Wind Cooling Comparisons for Horizontal Cylinders

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1988-09-01

Pagination or Media Count:

134.0

Abstract:

Corona wind refers to the movement of gas induced by the repulsion of ions from the vicinity of high voltage discharge electrode. A typical corona test configuration 134 is illustrated in Figure 1. Free charges are produced in the ionized region surrounding the high field active electrode. These charged particles migrate and collide with neutral air particles in the drift. Experiments were conducted to determine the effect of the corona wind on the convective heat transfer rate form each of three horizontally mounted, heated aluminum cylinders. The cylinder was maintained at ground potential and an emitter was connected to a high voltage source. Stretched wire and multipoint emitter devices were used. Emitter-to-cylinder spacing and field voltage were parameters. Blown air was also used to simulate the corona wind generated from the stretched wire emitter. An energy balance method was used for data analysis. Free convection heat transfer rates were used as a baseline. The results of all experiments were compared and contrasted. The multipoint emitter was a more efficient emitter device than the stretched wire emitter. The convection heat transfer rate due to the corona wind with an applied high voltage field of 15kV was as much as 6.5 times the free convection heat transfer rate. Keywords Electrostatic cooling. Theses.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE