Results 61 to 70 of about 203,745 (355)
Fully 3D‐Printed Wave‐Wound Electromagnetic Motors
Advanced Materials Technologies, EarlyView.This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe +4 more
wiley +1 more source
Investigation of the aerodynamic characteristics of a lifting body in ground proximity [PDF]
, 2016 The use of cambered hull shapes in the next generation of lighter-than-air vehicles to enhance aerodynamic performance, together with optimized take-off manoeuvre profiles, will require a more detailed understanding of ground proximity effects for such
Garry, Kevin P. +2 more
core +1 more source
Magnetic Droplet Manipulation on Open Surfaces
Advanced Materials Technologies, EarlyView.Recent advances in the manipulation of magnetic droplets demonstrate various manipulations on open surfaces, including transport, splitting, merging, and force‐controlled motion, enabled by magnetic particles and external fields. ABSTRACT Manipulation of liquids on a smaller scale enables applications in various fields, particularly diagnostics and ...
Robab Jahangir, Vahid Nasirimarekani
wiley +1 more source
Jixie qiangdu, 2017 In order to study the drag reduction performance of non-smooth circular cylinder,the SST k-ω turbulence model was been used to simulate the flow around a circular cylinder and studied the drag reduction performance of a circular cylinder at the ...
WANG GuoRong +4 more
doaj
Boundary layer, skin friction, and boattail pressure measurements from the YF-12 airplane at Mach numbers up to 3 [PDF]
, 1978 In-flight measurements of boundary layer and skin friction data were made on YF-12 airplanes for Mach numbers between 2.0 and 3.0. Boattail pressures were also obtained for Mach numbers between 0.7 and 3.0 with Reynolds numbers up to four hundred million.
Fisher, D. F.
core +1 more source
Determination of the geostrophic drag coefficient [PDF]
Tellus A: Dynamic Meteorology and Oceanography, 1975 DOI: 10.1111/j.2153-3490.1975.tb01660 ...
La Valle, Lodovico, Di Girolamo, Pietro
openaire +2 more sources
Stable Imitation of Multigait and Bipedal Motions for Quadrupedal Robots Over Uneven Terrains
Advanced Robotics Research, EarlyView.How are quadrupedal robots empowered to execute complex navigation tasks, including multigait and bipedal motions? Challenges in stability and real‐world adaptation persist, especially with uneven terrains and disturbances. This article presents an imitation learning framework that enhances adaptability and robustness by incorporating long short‐term ...
Erdong Xiao +3 more
wiley +1 more source
Aerodynamic analysis of wind turbine blades: A numerical study
Gazi Üniversitesi Fen Bilimleri DergisiIn this study, the aerodynamic performance of different wind turbine blades including FX 63-137, NACA 6415, NACA 63-415 has been investigated. XFLR5 has been employed to analyze the wind turbine blade at Reynolds numbers ranging from 1.5x105 to 1x106 and
İlker Yılmaz +2 more
doaj +1 more source
Drag force on an oscillating object in quantum turbulence
, 2009 This paper reports results of the computation of the drag force exerted on an oscillating object in quantum turbulence in superfluid $^4$He. The drag force is calculated on the basis of numerical simulations of quantum turbulent flow about the object ...
L. D. Landau +5 more
core +1 more source
Short and slim nacelle design for ultra-high BPR engines [PDF]
, 2017 An optimisation method consisting of the non-dominated sorting genetic algorithm (NSGA-II) and computational fluid dynamics of aero-engine nacelles is outlined.
MacManus, David G., Robinson, M.
core +1 more source