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Kriging Assisted Integrated Rotor-Duct Optimization for Ducted Fan in Hover
AIAA Scitech 2019 Forum, 2019The design of ducted fan was primarily based on parametric analysis and the existing optimization design studies mainly focus on either the rotor or the duct alone. However, the interactions between the rotor and duct remarkably affects the performance of
Jixiang Qing +5 more
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IEEE Robotics and Automation Letters, 2022
For agile fixed-wing aerial robots, the vertical/horizontal flight mode transition is a fundamental requirement for high maneuverability. This letter focuses on a challenging implementation in which the aircraft conducts the transitional flight at fixed ...
Zihuan Cheng, Hailong Pei
semanticscholar +1 more source
For agile fixed-wing aerial robots, the vertical/horizontal flight mode transition is a fundamental requirement for high maneuverability. This letter focuses on a challenging implementation in which the aircraft conducts the transitional flight at fixed ...
Zihuan Cheng, Hailong Pei
semanticscholar +1 more source
Scientia Horticulturae, 2021
Date palm is a dioecious tree that bearing male and female inflorescence on separate trees. Although pollination of date palm occurs naturally, in order to guarantee productivity, the artificial pollination can be carried out in commercial date farms. Up
Farid Akhavan +5 more
semanticscholar +1 more source
Date palm is a dioecious tree that bearing male and female inflorescence on separate trees. Although pollination of date palm occurs naturally, in order to guarantee productivity, the artificial pollination can be carried out in commercial date farms. Up
Farid Akhavan +5 more
semanticscholar +1 more source
Flight Transition Control for Ducted Fan UAV with Saturation on Control Surfaces
International Conference on Unmanned Aircraft Systems, 2021In this paper, we focus on the hover/high-speed-cruising transition flight control of a ducted fan unmanned aerial vehicle (UAV), in which saturation on control surfaces is taken into consideration.
Zihuan Cheng, Hailong Pei
semanticscholar +1 more source
IEEE Conference on Decision and Control, 2021
Due to the limitations of actuators, physical components, and onboard computers, autonomously performing aggressive maneuvers is challenging for miniature fixed-wing unmanned aerial vehicles(UAVs), especially for one with a ducted fan.
Su Cao, Xiangke Wang, Huangchao Yu
semanticscholar +1 more source
Due to the limitations of actuators, physical components, and onboard computers, autonomously performing aggressive maneuvers is challenging for miniature fixed-wing unmanned aerial vehicles(UAVs), especially for one with a ducted fan.
Su Cao, Xiangke Wang, Huangchao Yu
semanticscholar +1 more source
AFT FAN DUCT ACOUSTIC RADIATION
Journal of Sound and Vibration, 1998A finite element code has been developed for the prediction of the radiated acoustic field from the aft fan duct of a turbofan engine. The acoustic field is modelled based on the assumption that the steady flow in and around the nacelle is irrotational as is the acoustic perturbation.
W. Eversman, D. Okunbor
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Broadband self-noise from a ducted fan
AIAA Journal, 1998This paper describes the prediction of broadband self noise from ducted fans. The source mechanism is assumed to be the interaction of the turbulent boundary layer with the trailing edges of the fan blades. The source levels are obtained from the measurements of self noise from isolated blades by Brooks, Pope and Marcolini and these are corrected to ...
Stewart A. L. Glegg, Cyrille Jochault
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Prediction of tonal ducted fan noise
Journal of Sound and Vibration, 2016Abstract This study introduces an analytical model aiming at predicting the tonal acoustic sources generated and radiated by the rotor–stator interaction in a fan stage. This model is able to cope with complex three-dimensional stator geometries and it fully accounts for cascade effects, characteristic of modern fan stages.
J. de Laborderie, S. Moreau
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Numerical study on dynamic performance of a ducted fan moving in proximity to ground and ceiling
The Physics of FluidsDucted fans are widely employed in unmanned aerial vehicles (UAVs) for civil and military uses because they offer low noise and high efficiency. However, dynamic motions in close proximity can disrupt the flow patterns and aerodynamic behaviors of ducted
Yiwei Luo +5 more
semanticscholar +1 more source
Journal of Applied Mechanics, 1958
Abstract A theory is outlined by means of which it is possible to design ducted fans directly and without having to choose any parameters in an arbitrary fashion. Optimum sizes and fan speeds are theoretically determined. The design of two fans, one having inlet guide vanes and the other of the low slip-stream-rotation type having NPL ...
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Abstract A theory is outlined by means of which it is possible to design ducted fans directly and without having to choose any parameters in an arbitrary fashion. Optimum sizes and fan speeds are theoretically determined. The design of two fans, one having inlet guide vanes and the other of the low slip-stream-rotation type having NPL ...
openaire +1 more source