Results 21 to 30 of about 525,947 (205)
Precisely spun super rotors [PDF]
Nature Communications, 2021 AbstractImproved optical control of molecular quantum states promises new applications including chemistry in the quantum regime, precision tests of fundamental physics, and quantum information processing. While much work has sought to prepare ground state molecules, excited states are also of interest. Here, we demonstrate a broadband optical approach
Ivan O. Antonov +5 more
openaire +4 more sources
Nonlinear Transient Modeling and Design of Turbocharger Rotor/Semi-Floating Bush Bearing System
Lubricants, 2017 This work presents the bearing design and analysis of radial semi-floating bush oil lubricated bearings for a typical industrial turbocharger configuration.
Jianming Cao +3 more
doaj +1 more source
A comparison of coaxial and conventional rotor performance [PDF]
, 2009 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, Brown, Kim, Landgrebe, Newman
core +1 more source
Neutral metallacyclic rotors [PDF]
Chemical Communications, 2009 A prototype of a neutral Re-based metallacyclic rotor, assembled in a one-step process, possesses a para-phenylene rotor that rotates in solution with respect to the stator.
Sathiyendiran, Malaichamy +5 more
openaire +3 more sources
Machines, 2022 The spindle and grinding wheel flange (GWF) adopt double positioning of a tapered surface and end face. Due to the processing quality, the contact state of the spindle–GWF interface cannot be determined accurately.
Qianqian Yuan +3 more
doaj +1 more source
Main rotor-tail rotor intraction and its implications for helicopter directional control [PDF]
, 2008 Aerodynamic interference between the main and tail rotor can have a strong negative influence on the flight mechanics of a conventional helicopter. Significant unsteadiness in the tail rotor loading is encountered under certain flight conditions, but the
Brown, R.E., Fletcher, Timothy M.
core +1 more source
Lubricants, 2023 To study the variation rules of nonlinear stiffness of double-row angular contact ball bearings (DR-ACBB), this paper proposed a general mathematic model for DR-ACBB under three different configurations based on the improved quasi-static model of ball ...
Bin Fang, Jinhua Zhang, Jun Hong, Ke Yan
doaj +1 more source
Rotor wake interactions with an obstacle on the ground [PDF]
, 2018 An investigation of the flow around an obstacle positioned within the wake of a rotor is described. A flow visualisation survey was performed using a smoke wand and particle image velocimetry, and surface pressure measurements on the obstacle were taken.
Giuni, M., Green, R.B., Pickles, D.J.
core +1 more source
CPG Motion Control for a Bionic Manta Ray Robot Fish Propelled by Flexible Pectoral Fin
水下无人系统学报, 2023 Considering a manta ray as the bionic object, this paper proposes a design scheme for a bionic manta-ray robot fish with flexible pectoral fin propulsion.
Kaigang NAN +3 more
doaj +1 more source
Investigation of the rotor–obstacle aerodynamic interaction in hovering flight [PDF]
, 2018 In this paper, a comprehensive experimental survey of the aerodynamic interaction of a hovering rotor in the proximity of a ground obstacle is described, taking advantage of multiple experimental techniques.
Giuni, Michea +2 more
core +2 more sources