GyroWheel is an innovative device that combines the actuating capabilities of a control moment gyro with the rate sensing capabilities of a tuned rotor gyro by using a spinning flex-gimbal system. However, in the process of the ground test, the existence of aerodynamic disturbance is inevitable, which hinders the improvement of the specification performance and control accuracy. A vacuum tank t...

This paper discusses the role that computational fluid dynamics plays in the design of aircraft. An overview of the design process is provided, covering some of the typical decisions that a design team addresses within a multi-disciplinary environment. On a very regular basis trade-offs between disciplines have to be made where a set of conflicting requirements exists. Within an aircraft develo...

Published conference paper Gilkeson, C.A., Toropov, V.V., Thompson, H.M., Wilson, M.C.T., Foxley, N.A. and Gaskell, P.H. (2008) Aerodynamic shape optimization of a low drag fairing for small livestock trailers. In: 12th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. Proceedings. 12th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 10 12 September 2008, Vic...

The aerodynamic noise and vibration caused by the vehicle door mirror has been much studied [1], largely by numerical simulation [2]. It is evident that the aerodynamic noise and vibration are strongly associated with the flow structures, and the unsteady behavior of the vortex causes the wind noise. Recently the aero-acoustic characteristics of a vehicle door mirror were also studied by numeri...

Improvement in terminal accuracy is an important objective for future artillery projectiles. Generally it is often associated with range extension. Various concepts and modifications are proposed to correct the range and drift of artillery projectile like course correction fuze. The course correction fuze concepts could provide an attractive and cost-effective solution for munitions accuracy im...

The interaction of the overlying turbulent flow with riblets, and its impact on their drag reduction properties are analysed. In the so-called viscous regime of vanishing riblet spacing, the drag reduction is proportional to the riblet size, but for larger riblets the proportionality breaks down, and the drag reduction eventually becomes an increase. It is found that the groove cross section A(...

ROYAL AIRCRAFT ESTABLISHMENT Some simple conical c~mbcr shapes to produce low lift-depend,cnt drag on a slender delta wing G. G. Brebner This note presents some of the theoretical aerodynamic characteristics of narrow delta wings having flat csntre portions and two types of simple conical camber designed to produce zero load at the leading edge at the design C,.,. Slender wing theory is used in...

Biomechanics plays an important role helping Paralympic sprinters to excel, having the aerodynamic drag a significant impact on the athlete's performance. The aim of this study was to assess the aerodynamics in different key-moments of the stroke cycle by Computational Fluid Dynamics. A world-ranked wheelchair sprinter was scanned on the racing wheelchair wearing his competition gear and helmet...