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Full-Text Articles in Mechanical Engineering
Aircraft Thermal Management Using Loop Heat Pipes, Andrew J. Fleming
Aircraft Thermal Management Using Loop Heat Pipes, Andrew J. Fleming
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The objective of this thesis was to determine the feasibility of using loop heat pipes to dissipate waste heat from power electronics to the skin of a fighter aircraft and examine the performance characteristics of a titanium-water loop heat pipe under stationary and elevated acceleration fields. In the past, it has been found that the boundary condition at the condenser can be a controlling factor in the overall performance of this type of thermal management scheme. Therefore, the heat transfer removed from the aircraft skin has been determined by modeling the wing as a flat plate at zero-incidence as a …
The Effect Of Variable Gravity On The Cooling Performance Of A Partially-Confined Fc-72 Spray, Travis Edward Michalak
The Effect Of Variable Gravity On The Cooling Performance Of A Partially-Confined Fc-72 Spray, Travis Edward Michalak
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This thesis discusses the effects of a variable-gravity environment on the performance of a subcooled partially-confined spray. An experiment, consisting of a test chamber, the associated flow loops, and instrumentation, was fabricated and flown on the NASA Reduced-Gravity Testing Platform. This modified KC-135 aircraft followed a parabolic flight path to provide various acceleration levels. The spray chamber contained two opposing nozzles spraying onto Thick Film Resistor (TFR) heaters, which were mounted on insulating glass pedestals. Only the upward facing heater was used during this testing. Thermocouples under the heater in the glass pedestal were used to determine the heater surface …