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9.820  Articles
1 of 982 pages  |  10  records  |  more records»

An inviscid actuator disk model is embedded in a three-dimensional low-order panel method code for inviscid incompressible ow in order to study the propeller effects on an arbitrary body. The actuator disk model predicts the time-averaged induced velociti... see more

The Blade-Element Momentum (BEM) model for Horizontal-Axis Wind Turbines (HAWTs), although extremely useful, is known to be approximate due to model formulation insufficiencies, for which add-ons and corrections have been formulated over the past many dec... see more

In this study, large-eddy simulations (LESs) were performed to investigate the effects of changing wind direction on the turbine wakes and associated power losses in the Horns Rev offshore wind farm. In the LES framework, the turbulent subgrid-scale stres... see more

A configurable multi-segment morphing system for a micro air vehicle (MAV) is presented in this study. One of the novelties is the development of an adaptive control allocation algorithm that provides fast, simultaneous and independent operation of four m... see more

To better understand the influence of swirl on the thermally-stratified near wake of a self-propelled axisymmetric vehicle, three propulsor schemes were considered: a single propeller, contra-rotating propellers (CRP), and a zero-swirl, uniform-velocity j... see more

Periodic exogenous signals often exist in motion systems, especially those involving one or more rotating elements. These periodic exogenous signals deteriorate the performance of motion systems, and these adverse effects cannot be practically eliminated ... see more

The world of aeromodelling today is arguably growing rapidly, various types of technology developments penetrated in this world. The hobbyist of the world of aeromodelling is also quite a lot, it is related to people who play aeromodelling. When aeromodel... see more

The operation of a synthetic jet actuator driven by a thin piezoelectric disk is both analytically and numerically investigated by means of a lumped element mathematical model, in order to obtain information about the frequency response of the device. It ... see more

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