Effects of Corona on Heat Transfer in an Enclosure
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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Experiments were conducted to determine the effects of corona wind on heat transfer rates for enclosures. Tests were performed with an enclosed cavity heated on the bottom and cooled on the top and vice versa. A corona wind was established inside the cavity by applying high voltages to 0.004 inch diameter chromel wires placed along the hot and cold surfaces of the cavity. Tests were conducted using both positive voltage potential and negative voltage potential to create the corona discharge. Different wiring configurations were used to establish a variety of flow patterns inside the cavity. The heated surface heat transfer rates were calculated for each of the test configurations with and without corona. These heat transfer rates were determined when the corona discharge was present and compared to the rates found when the discharge was not present. Comparing these transfer rates revealed how much the corona wind augmented the heat transfer process. Results showed corona wind can increase heat transfer rates inside an enclosure by almost four times the rates attained without the corona discharge for the wire configurations investigated. Theses.
- Electricity and Magnetism