Results 41 to 50 of about 4,278 (263)

Lift Coefficient Prediction Versus Angle of Attack: A Polynomial Representation Based on A VLM-DATCOM Hybrid Model [PDF]

Journal of Applied Fluid Mechanics
The typical function of lift coefficient versus angle of attack (the lift curve) is represented by a linear function with two coefficients and beyond its linear range by a third order polynomial with four coefficients.
M. Sahraoui, M. Mekadem, A. Boutemedjet, D. Scholz   +3 more
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Visualization of flow separation and control by vortex generators on an single flap in landing configuration

EPJ Web of Conferences, 2012
This paper focuses on a suppression of the flow separation, which occurs on a deflected flap, by means of vortex generators (VG's). An airfoil NACA 63A421 with a simple flap and vane-type vortex generators were used.
Matějka Milan, Popelka Lukáš, Součková Natálie, Kuklová Jana   +3 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Machine Learning‐Supported Analysis for Predicting and Visualizing Nonlinear Relationships Between Material Properties in Electroplated Chromium Layers

Advanced Engineering Materials, EarlyView.
This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer, Christopher Mai, Luca Eisentraut, Andreas Bund, Ricardo Buettner   +4 more
wiley   +1 more source

Simple Method to Calculate the Oscillating Lift on a Circular Cylinder in Potential Flow

Journal of Mathematical and Fundamental Sciences, 2019
. A simple potential flow model is presented to calculate the oscillating lift on a circular cylinder. In essence, the time dependent lift acting on a cylinder is due to the presence of a vortex shed off the separation point on the cylinder.
Harijono Djojodihardjo
doaj  

Aerodynamic interactions analysis of propeller configurations and spatial parameters on a twin-boom unmanned aerial vehicle

Engineering Applications of Computational Fluid Mechanics
To overcome the technical bottleneck in aircraft design where aerodynamic and propulsion systems are treated separately, an integrated actuator disk model (ADM) simulation platform based on blade element momentum theory (BEMT) was developed, enabling ...
Xiaolu Wang, Changning Chen, Yingyu Liu, Daijun Liu, Mingqiang Luo   +4 more
doaj   +1 more source

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

Advanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim, Kyungjoo Jo, Kwanghyeon Park, Jun Hee Kim, Jong Hyeong Cho, Inhoo Choi, Sei Kwang Hahn   +6 more
wiley   +1 more source

Influence of Rear Slant Angle on Drag and Lift of the Ahmed Body [PDF]

MATEC Web of Conferences
Through computer simulations using numerical methods, an Ahmed body model, was examined to study the aerodynamic properties, as well as the evolution of vortex patterns at the rear of this model.
Ben Moussa Lamiae, El Khalfi Ahmed, Seddouki Abbass   +2 more
doaj   +1 more source