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Helicopter Main-Rotor/Tail-Rotor Interaction
Journal of the American Helicopter Society, 2000Preliminary results from a study to model the interaction aerodynamics and aeroacoustics of the main and tail rotor of a helicopter in subsonic flow are presented. The configurations studied are: 1) two bladed main and tail rotors in hover, and 2) a four-bladed main rotor and two-bladed tail rotor in climbing flight.
Yin, J., Ahmed, S.R.
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Artificial Molecular Rotors [PDF]
Chemical Reviews, 2005 AbstractFor Abstract see ChemInform Abstract in Full Text.
Josef Michl +3 more
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Current Protocols in Molecular Biology, 1996
AbstractThis appendix presents useful basic information, including common abbreviations, useful measurements and data, characteristics of amino acids and nucleic acids, information on radioactivity and the safe use of radioisotopes and other hazardous chemicals, conversions for centrifuges and rotors, characteristics of common detergents, and common ...
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AbstractThis appendix presents useful basic information, including common abbreviations, useful measurements and data, characteristics of amino acids and nucleic acids, information on radioactivity and the safe use of radioisotopes and other hazardous chemicals, conversions for centrifuges and rotors, characteristics of common detergents, and common ...
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A Computational Study on Rotor Interactional Effects for a Quadcopter in Edgewise Flight
Proceedings of the Vertical Flight Society 80th Annual Forum, 2018This study examines the performance of a quadcopter in edgewise flight conditions with flow simulated using the commercial Navier-Stokes solver, AcuSolve, with a Detached Eddy Simulation (DES) model.
Matthew P. Misiorowski +2 more
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On the Vibration of Rotor With Rotor/Stopper Rubbing
Volume 7A: 17th Biennial Conference on Mechanical Vibration and Noise, 1999Abstract The vibration of a flywheel rotor with rotor/stopper rubbing is investigated by experimental methods. In the experiments, the large amplitude of the rotor vibration is excited by the electromagnetic harmonic excitation force and thus causes the rubbing between the rotor and the stopper.
Zhaoxiong Jin +2 more
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An Experimental Investigation on Rotor-to-Rotor Interactions of Small UAV Propellers
, 2017In the present study, an experimental investigation was performed to study the effects of rotor-to-rotor interactions on the aerodynamic and aeroacoustic performances of small UAVs.
Wenwu Zhou, Zhe Ning, Haixing Li, Hui Hu
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Entry Technology Conference, 1964
Autorotating rotors can, in a single configuration system, provide the capability for retardation, stabilization, drag force modulation, glide at useful L/D ratios, maneuvering and control during descent, and low-velocity touchdown. A given configuration will deploy over a wide range of speeds and dynamic pressures.
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Autorotating rotors can, in a single configuration system, provide the capability for retardation, stabilization, drag force modulation, glide at useful L/D ratios, maneuvering and control during descent, and low-velocity touchdown. A given configuration will deploy over a wide range of speeds and dynamic pressures.
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A Rotor Speed Sensor of Cycloid Rotor Flowmeter
Advanced Materials Research, 2014Positive displacement flowmeters (PDFs) are highly accurate flowmeters that are relatively insensitive to the upstream velocity distribution and fluid viscosity. Rotor speed sensors are the key components of a PDF. This paper presents the structure of a non-contact rotor speed sensor which can be used in cycloid rotor flowmeter and other PDFs.
Chuan Ding, Shuo Liu, Fan Ding
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Current Protocols in Protein Science, 1995
AbstractThis appendix provides rmax values (the maximum value of the rotating radius between the particle being centrifuged and the axis of rotation) for commonly used rotors manufactured by Du Pont (Sorvall), Beckman, Fisher, and IEC. Additionally, nomograms are provided for determining the relative centrifugal force (RCF) where speed and rmax are ...
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AbstractThis appendix provides rmax values (the maximum value of the rotating radius between the particle being centrifuged and the axis of rotation) for commonly used rotors manufactured by Du Pont (Sorvall), Beckman, Fisher, and IEC. Additionally, nomograms are provided for determining the relative centrifugal force (RCF) where speed and rmax are ...
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Broadband Noise Due to Rotor-Wake/Rotor Interaction in Contra-Rotating Open Rotors
AIAA Journal, 2010A semi-analytical model for the prediction of the broadband noise due to the interaction between turbulent rotor wakesandarotorincontra-rotatingopenrotorsispresented.Theunsteadyloadingoftherearrotorismodeledusing classicalisolated flat-platetheory.Striptheoryisusedtotreatthespanwisevariationsofaerodynamicquantitiesand blade geometry. The turbulent wake
Blandeau, Vincent P., Joseph, Phillip F.
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