student profile: Mr Tamas Bykerk


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Thesis work

Thesis title: Low Speed Handling Qualities of Hypersonic Vehicles

Supervisors: Gareth VIO , Dries VERSTRAETE

Thesis abstract:

Interest in developing vehicles which can drastically reduce travel time between major world cities is on the increase. Air breathing aircraft capable of travelling in excess of five times the speed of sound, also known as hypersonic waveriders, are a possible solution. Their ability to travel at speeds in excess of Mach 5 would mean a cutting down the travel time between Australia and Europe significantly.�br /� �br /� Research into hypersonic aircraft is mainly confined to analysis of the technology required for the design operating point. Despite the need for these vehicles to operate at subsonic speeds during landing and take-off phases, research into the low speed segments of these flights is limited. This is potentially problematic as a high speed optimised vehicle can become unstable at low speed or would require excessive angle of attack (AoA) and speed to land. The latter would have major effects on pilot visibility and long runway lengths.�br /� �br /� Major differences in geometry exist between an optimum hypersonic vehicle (sharp and angular) and a subsonic aircraft (blunt and rounded). The high speed design features have a negative effect on the low speed performance of the vehicle, as sharp geometry induces flow separation, generally resulting in high drag and low lift. To have the most viable aircraft, a compromise must be sought to increase the subsonic performance while not severely impacting the hypersonic aerodynamics, stability or efficiency.

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.