Analysing the fluid dynamic performance of a bare rotor when succumb to yawed flow conditions has consistently presented diminishment in mechanical power conversion efficacy. Introducing duct along perimeter been acknowledged sustain performance, yet causation behind this phenomenon is uncertain. This study puts forward an investigation into hydrodynamic concerning true-scale, ducted, high-soli...

OpenProp is an open-source code suite that can be used for the design, analysis, and fabrication of optimized propellers and horizontal-axis turbines. The numerical model is based on propeller lifting line theory, which is used in parametric design codes employed by the U.S. Navy as well as commercial designers. OpenProp is written in Matlab M-code, which is widely used in academia and industry...

This paper investigates the aerodynamic characters of a model ducted fan system, analyses the basic principle of the effect of thrust promotion and torque reduction, discovers the relationship between the revolutions per minute(RPM) of the fan and the characters of thrust, as well as system torque. Firstly a model ducted fan has been designed and manufactured according to the specific structure...

This paper presents an attitude control system for an organic flight array(OFA) which is a novel unmanned aerial vehicle(UAV) concept to consist of multiple ducted-fan UAVs. The OFA is able to be assembled or separated by single modules, the ducted-fan UAVs, to fulfill operation missions such as indoor/outdoor monitoring, communication relay, and system jamming. Therefore, the array can have va...

Abstract Ducted wind turbines (DWTs) can take the advantage of ground effect (GE) when installed close to urban areas. To this aim, a parametric study investigate aerodynamic performance DWTs in relation three different distances are investigated. The flow around commercial DWT model using simplified duct actuator disc (AD) based on Reynolds Averaged Navier-Stokes (RANS) equations is performed....

Recent development in using wind turbines for urban areas results inserting inside buildings. As buildings' walls may act as a duct the turbine, this study focuses on ducted turbine with fixed geometry. A method is organized achieving improved generated power and speed augmentation geometry of regardless type which aim building designers. Using porous disc (PD) instead rotor makes cost time eff...

A valuable new resource being developed for today’s soldier are small ducted fan VTOL UAVs. Although beneficial in many ways, a major operational problem of ducted fan vehicles is precise control when flying in crosswinds and turbulent conditions in general. There are two significant, inherent issues associated with ducted fan control in crosswinds; 1) lateral momentum drag and 2) a duct stabil...