Results 61 to 70 of about 98,557 (299)

Powder Optimization Strategies for Binder Jetting Printing of BaTiO3 and Ba0,6Sr0,4TiO3 Ceramics

Advanced Engineering Materials, EarlyView.
Powder optimization is investigated to enable binder jetting of BaTiO3 and Ba0.6Sr0.4TiO3 ferroelectric ceramics. The antagonistic relationship between flowability and binder compatibility is addressed through binder impregnation of granulated powders and fumed silica addition to fine powders.
Fanny Pruvost, Lionel Presmanes, Soléna Colin, Marie Vidal, Sophie Guillemet‐Fritsch   +4 more
wiley   +1 more source

‘Merahefet’ (Genesis 1:2): The Dynamics of the Spirit in the Old Testament

Kairos (English Ed.), 2007
The author analyses the place and role of the Holy Spirit in creation on the basis of Genesis 1:2, where in the important prologue to the actual act of creation, we find an interesting situation, in which the Spirit of God makes an appearance, then ...
Danijel Berković
doaj  

Aerodynamic Characteristics Analysis of Twin-rotor in Tandem Helicopter

Hangkong gongcheng jinzhan, 2020
There will be complex interference between the front and rear rotors of tandem helicopter. The flow field analysis is carried out for the aerodynamic interference between two rotors, the numerical analysis method based on momentum source model and N-S ...
CHEN Jianwei, ZHU Qinghua, WANG Kun, ZHU Zhenhua, SHEN Suiyuan   +4 more
doaj   +1 more source

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

A unique facility for V/STOL aircraft hover testing [PDF]

The Langley Impact Dynamics Research Facility (IDRF) was modified to obtain static force and moment data and to allow assessment of aircraft handling qualities during dynamic tethered hover flight. Test probe procedures were also established. Static lift
Culpepper, R. G., Gillespie, E. A., Lane, A. G., Murphy, R. D.   +3 more
core   +1 more source

Towards Defect Phase Diagrams: From Research Data Management to Automated Workflows

Advanced Engineering Materials, EarlyView.
A research data management infrastructure is presented for the systematic integration of heterogeneous experimental and simulation data required for defect phase diagrams. The approach combines openBIS with a companion application for large‐object storage, automated metadata extraction, provenance tracking and federated data access, thereby supporting ...
Khalil Rejiba, Sang‐Hyeok Lee, Christina Gasper, Martina Freund, Sandra Korte‐Kerzel, Ulrich Kerzel   +5 more
wiley   +1 more source

Surrogate-based aerodynamic optimization of proprotor blades for a parcel delivery UAV [PDF]

INCAS Bulletin
This study presents a surrogate-based aerodynamic optimization framework for a quad-tiltrotor platform designed for both hover and forward flight. To obtain an optimized blade design in both hover and forward flight conditions, a free wake model is ...
Sooin PARK, Usama YOUNUS
doaj   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

Assessing the Fidelity of Steady-State MRF Modeling for UAV Propeller Performance in Non-Axial Inflow

Aerospace
The aerodynamic behavior of small-scale UAV propellers operating under non-axial inflow conditions poses a significant prediction challenge due to the presence of strong azimuthal asymmetries, inherently unsteady flow phenomena, and Reynolds number ...
Lorena Aular, Pedro Quintero, Roberto Navarro, Andrés Tiseira, Sébastien Prothin   +4 more
doaj   +1 more source

Wind tunnel test on a 1/4.622 Froude scale, hingeless rotor, tilt rotor model, volume 1 [PDF]

Wing tunnel test data on a 1/4.622 Froude scale, hingeless rotor, tilt rotor mode are reported for all potential flight conditions through hover and a wide envelope of transitions.
Alexander, H. R., Magee, J. P.
core   +1 more source