An exploratory computational investigation using RANS & URANS was carried out to understand the aerodynamics around an isolated single rotating wheel with decreasing ground proximity. The wheel was initially modelled in free air conditions, then with decreasing ground proximity and increased yaw angle with rotational speeds. Three speeds of rotation were applied to the wheel so that the effect ...

We study noise generation at the blade tips of propellers designed for future electric aircraft propulsion and, furthermore, analyze interrelationship between mitigation and aerodynamics improvement in terms propeller geometric designs. Classical with three or six blades a conceptual joined dual-blades are compared to understand effects tip vortices on aerodynamics. The dual is constructed by j...

The dynamic response and performance of a micro UAV is greatly influenced by its aerodynamics which in turn is affected by the interactions with features in the environment in close proximity. In the paper we address the modeling of quadrotor robots in different flight conditions that include relative wind velocity and proximity to the ground, the ceiling and other robots. We discuss the incorp...

titled Advanced simulation techniques for vortex dominated flows in aerodynamics. The financial support from STW and the National Aerospace Laboratory NLR is gratefully acknowledged.

Numerical modeling of the behavior of fire and smoke within proposed building atria have revealed the possible presence of violent fire whirls or fire tornadoes induced by an inadvertent combination of ventilation and exhaust openings. Such fire vortexes can accelerate combustion up to ten times that seen during conventional fires, rapidly move fire and debris across available evacuation routes...