Results 91 to 100 of about 130,331 (289)
The inner disk radius in the propeller phase and accretion-propeller transition of neutron stars
, 2016 We have investigated the critical conditions required for a steady propeller effect for magnetized neutron stars with optically thick, geometrically thin accretion disks.
Ertan, Unal
core +1 more source
Photochemical Fuel Carrier Molecules for Robotic Embodied Energy
Advanced Materials, EarlyView.We designed a novel fuel carrier photoresponsive molecule for on‐demand energy storage and release. Carrier molecules undergo bond scission under UV light to release chemical fuel and locally generate propulsive Marangoni flows. We demonstrate this photochemical embodied energy strategy in small‐scale robots and active matter systems, enabling ...
Chuqi Huang +6 more
wiley +1 more source
Topological optimization of a ducted propeller of UAV
Авіаційно-космічна техніка та технологіяThe subject of this study is the minimization of the duct mass for a ducted propeller of UAV. The object of this study is a two-bladed ducted quadcopter propeller. The peripheral diameter of the propeller is 128 mm, and the hood is 2 mm thick.
Anton Balalaiev +4 more
doaj +1 more source
Numerical simulation on bearing force of propeller for machining errors in non-uniform inflow
Zhongguo Jianchuan Yanjiu, 2017 In order to study the bearing force caused by the machining errors of composite material propeller in non-uniform flow, the propeller was computed by changing the machining error of the propeller in six degrees of freedom, in which the main blade ...
YU Anbin, YE Jinming, ZHANG Kaiqi
doaj +1 more source
An Electric Thrust Meter Suitable for Flight Investigation of Propellers [PDF]
A lightweight instrument that utilizes resistance-wire electric strain gases to measure propeller-shaft thrust has been developed. A wind-tunnel investigation on a propeller installed, on a single-engine pursuit airplane showed that the instrument gave a
Millenson, Morton B. +1 more
core +1 more source
Advanced Materials, EarlyView.This work introduces an atomic‐level engineered bimetallic MOF Platform that resolves the inherent trade‐off between environmental stability and propulsion efficiency. By integrating robust Fe‐O bonds for hydrolysis resistance and enabling d‐orbital charge transfer (Fe3+→Cu2+) for enhanced photothermal conversion, the design achieves a highly durable ...
Senlin Rao +3 more
wiley +1 more source
Application of Vortex Flow Model in Propeller-Stator System Design and Analysis
Polish Maritime Research, 2018 The paper covers basics of the vortex model used for propeller-stator systems. The outline of the design algorithm is given and the results of its application are shown.
Król Przemysław, Bugalski Tomasz
doaj +1 more source
Modelling a Propeller Using Force and Mass Rate Density Fields
Journal of Marine Science and Engineering, 2018 A method to replace a propeller by force and mass rate density fields has been developed. The force of the propeller on the flow is calculated using a boundary element method (BEM) program and used to generate the force and mass rate fields in a Reynolds-
David Hally
doaj +1 more source
The NASA high-speed turboprop program [PDF]
Technology readiness for Mach 0.7 to 0.8 turboprop powered aircraft with the potential for fuel savings and DOC reductions of up to 30 and 15 percent respectively relative to current in-service aircraft is addressed. The areas of propeller aeroacoustics,
Dugan, J. F. +3 more
core +1 more source
Acoustically propelled nanoshells
Nanoscale, 2016 Herein we report a new design for acoustic nanoswimmers, making use of a nanoshell geometry that was synthesized using a sphere template process. Such shell-shaped nanomotors display highly efficient acoustic propulsion on the nanoscale by converting energy from the ambient acoustic field into motion.
Soto, Fernando +8 more
openaire +4 more sources