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Showing 1 to 12 of 12 for “"blade element theory"”.
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Study of Contra-Rotating Coaxial Rotors in Hover: A Performance Model Based on Blade Element Theory Including Swirl Velocity
… coaxial rotor system. As it is based on the blade element theory, it could be used as a design tool where the engineer can modify all parameters - rotor radius, blade pitch distribution, tip velocity, rotor spacing, number of blades, blade chord, and airfoil's shape through its lift …
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Interactive Optimization Programs for Initial Propeller Design
… along with the combined annular momentum theory and blade element theory optimization. Both techniques require preliminary hull and engine design characteristics, but do not necessitate extensive background knowledge of pro- pellers and their calculations. A comparison of the two methods …
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A Numerical Vortex Approach To Aerodynamic Modeling of SUAV/VTOL Aircraft
… flowfield. The propeller/slipstream model uses blade element theory combined with momentum conservation equations. This model is expected to be of significant importance in the design of tail-sitter vertical take-off and landing (VTOL) aircraft, where the propeller slipstream is the primary …
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Aerodynamic and Performance Analysis of a Morphing Helicopter Rotor System
… specifically variable rotor speed and variable blade twist, on various parameters such as the distribution of angle of attack, lift, power, thrust and/or other metrics describing the performance of a helicopter rotor. A MATLAB based blade element theory model was developed and executed for …
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Development of a Miniature VTOL Tail-Sitter Unmanned Aerial Vehicle
… The numerical analysis employed a propeller blade-element theory coupled with momentum equations to predict the influence of a propeller slipstream on the freestream flow field, then the aircraft was analyzed using 3-D vortex lifting-line theory to model finite wings immersed in the flow …
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Experimental and theoretical study of horizontal-axis wind turbines
… of aerodynamics, turbulence. aeroelasticity and blade optimisation. EXisting aerodynamic theories based on blade-element theory for predicting the loads on a wind turbine blade are reviewed and extended to include non-uniform flow, tip losses and the 'turbulent wake' state. A theoretical model …
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Digital Twin Platform for Drone Applications
… a high-fidelity digital twin, modeled using Blade Element Theory, with parameterized aerodynamic forces tailored to the Quanser QDrone2 and adaptable to other quadrotor architectures. A dedicated Control library, built within the Gazebo ecosystem, facilitates rapid prototyping and …
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Extended Momentum Model for Single and Multiple Hydrokinetic Turbines in Subcritical Flows
… extending the Free Surface Actuator Disc Theory to yield drag forces and interference factors from a series of two porous discs in open channel flows. The new model includes blockage ratio and Froude number as independent variables, which are inferred in advance to yield a single solution …
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Advanced Modelling of Helicopter Nonlinear Dynamics and Aerodynamics
… for flap, lag and feather motions for each blade as well as for their nonlinear dynamic coupling. The tail rotor is modelled including the flap-feather coupling via delta three angle. The main and tail rotors' angular velocities are implemented by PID controllers. Main rotor linear and …
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Investigation Into Modeling And Control Methods To Optimize The Power Output Of Wind Turbines
… such as attitude with respect to the wind and blade pitch settings. Optimizing power output with respect to these parameters is accomplished by optimizing the rotary system's power coefficient. A primary objective of this research is to optimize the power coefficient in a design space that …
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Aerodynamic analysis of groove based vortex trap configuration on the retreating helicopter blade
… issue of high angle of attacks at the retreating blade receives attention from countless researchers because it is an important factor in the stability of the helicopter. The retreating blade stall will effect the stability of the helicopter due to the high angle of attacks. Prouty‟s helicopter …
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Adaptive Composite Blades for Horizontal Axis Tidal Turbines
… devices more efficient and economic.<br/>The blades of a HATT are the source of energy extraction for the device and are required to operate in a harsh subsea environment for a long (20 year) life cycle with minimal need for maintenance. Choice of an appropriate foil section for the blade is …