Fowler, Michael John (2014) Hypersonic rocket manoeuvre in the TUSQ facility. [USQ Project]
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Abstract
A number of methods are currently used for the design and testing of hypersonic vehicles, of particular focus in this research is those techniques employed in hypersonic wind tunnels. Current approaches to this testing use fixed sting mounted models, tethered models, and free-flight models to study its behaviour. An addition to these testing techniques and the focus of this project is the use of models with actuated control surfaces to allow the study of a hypersonic vehicle under dynamic conditions. This project aimed to design, construct, and validate; through demonstration of a pitching manoeuvre, a subscale model with an on-board control surface actuation system suitable for use in the University of Southern Queensland hypersonic wind tunnel (TUSQ). A tethered model with actuated control surfaces would indicate how the full-scale vehicle would behave whilst undertaking a manoeuvre.
The first phase of design was a development of a semi-analytical analysis to determine the expected forces and therefore response of the model. This provides data to later compare with the experimental results and parameters for the design of the model. The design of the model covered all components including the fin actuation system, tethering and support system and model housing design. The final phase was building and testing of the model in the
TUSQ facility.
Two runs in the hypersonic facility were completed as part of the research. Unfortunately neither run resulted in a demonstration of an entire successful manoeuvre. Analysis of the results revealed that the motor controlling the fin
operations was providing insufficient torque and the fin control was not occurring as expected. In addition the model exited the Mach cone of developed flow during its pitching manoeuvre. These two factors caused discrepancies between theoretical calculations and experimental data. Analysis of the results and high-speed footage of the model indicate that the technique has the potential to be valid however it will require some further work to make it practical and effective for use in design of hypersonic vehicles.
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