Ads

PhD in Engineering Voltage Uprating for More-electric and Hybrid Aircraft

Cardiff University is pleased to invite applicants to apply for a PhD position in aviation. Potential candidates should apply before August 31, 2019.

This research project proposes to quantify the effect of atmospheric conditions on the partial discharge thresholds on the more and all-electric aircraft.

Decarbonisation of the transport sector is a major priority, both nationally and globally. It is estimated that the domestic and international aviation sectors constitute 2% of the global CO2 emissions arising from human activity. The member states of the UN International Civil Aviation Organisation are committed to offset any increases in emissions beyond 2020 which, combined with the drive for increasing fuel efficiency, will stimulate aircraft weight reduction beyond that already achieved through the adoption of composite airframe materials.

The more-electric aircraft concept permits higher system efficiencies to be realised through electrification of traditional mechanical and hydraulic aircraft subsystems. It can also be considered a stepping stone to realising a commercial hybrid and all-electric aircraft. Both types of aircraft will be equipped with more diverse and safety-critical subsystems, based on high density power electronic converters and system ratings in excess of 1000 Volts. The increased stress experienced by cable insulation, connectors and other equipment, combined with extreme and dynamic environmental conditions experienced in flight, presents a number of technical challenges.

The uprating of electrical power systems requires the aircraft design engineer to control for electrostatic phenomena which will arise within the normal operating regime of the aircraft, and there are a number of factors that must be taken into account when assessing the performance of such systems: There is to date very little published work concerned with dynamic atmospheric effects on ascent and descent, or the implications of short term system- and atmospherically-induced over voltages. A fundamental understanding of these parameters in medium-voltage dc systems is critical to the increasing electrification of airborne power distribution, and places renewed emphasis on insulation coordination and the mitigation of partial discharges.

A purpose-built test facility will be established to replicate the dynamic atmospheric conditions to which aircraft systems are subjected in service. Simulations will be performed to determine the appropriate test conditions, which will then be applied to standard test samples to study the mechanisms and thresholds of partial discharge activity. The findings will be used to inform a set of correction factors that system designers may use in the robust design of future airborne electrical systems.


Summary:

More scholarships: phd scholarship in aviation, aviation phd fellowship, phd fellowship in uk, phd fellowship at cardiff university

Get latest scholarships via your email! It's free!
Remember to check your email and active the subscription.
You can unsubscribe any time.
Copyright © 2019 HuntScholarship.com. All Right Reserved.