Results 111 to 120 of about 2,935,132 (222)

Numerical study of the unsteady aerodynamics of helicopter rotor aerofoils

, 1999
A two-dimensional model of the aerodynamics of rotor blades in forward flight is proposed in which the motion of the blade is represented by periodical variations of the freestrearn velocity and incidence. A novel implicit methodology for the solution
Shaw, Scott
core   +3 more sources

An Integrated Numerical and Bollard Pull Evaluation Approach for Early‐Stage Resistance and Thrust Assessment of a Small Craft

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Early‐stage hydrodynamic assessment of slender multihull vessels is challenged by limited geometric maturity, uncertain propulsion integration, and strong sensitivity to operating conditions. Under such constraints, reliance on a single analytical or numerical method may lead to misleading design decisions due to oversimplification or ...
Chairat Napasaksri, Napat Intaraksa, Chalermkiat Nuchturee, Ramil Kesvarakul, Sarawuth Srinakaew   +4 more
wiley   +1 more source

Unsteady flow of rotating Brinkman type fluid in moving disk

, 2020
In this paper, the exact solution for unsteady flow of rotating Brinkman type fluid over a moving disk is investigated. The momentum governing equation is modelledin the form of Partial Differential Equation together with the initial and boundary ...
Khan, Ilyas, Shafie, Sharidan, Mohamad, Ahmad Qushairi, Ismai, Zulkhibri, Zakaria, Muhamad Najib   +4 more
core  

Solids Conveying in Injection Molding Machines—Analytical Model for Smooth and Grooved Feed Sections Derived From DEM Simulations

Polymer Engineering &Science, EarlyView.
Understanding Solids Conveying in Injection Molding Machines – Dimensions. ABSTRACT Solids conveying is a key aspect for the design of polymer processing machines, especially for processes with high screw speeds, grooved feed sections, and material with low bulk density.
Jan Landgraeber, Volker Schoeppner, Dennis Kleinschmidt, Dominik Jonek, Nils Grieger   +4 more
wiley   +1 more source

CALCULATION OF HYDRO-STREAM PARAMETERS DURING FLUID ACCELERATION IN HALF-CLOSED CHAMBER WITH EXIT TO FLAT SURFACE

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2005
The paper presents a method for calculation of maximum fluid velocity in a process chamber that is installed with a gap relative to the surface to be cleaned while burning gaseous mixture composed of 2H2 + O2 in the chamber.
V. V. Ivashechkin, D. A. Kozlov, E. I. Mikhnevich   +2 more
doaj  

In Situ Atmospheric Plasma Treatment Enables First‐Layer Adhesion of PEEK on Borosilicate Glass for FDM‐Printed Non‐Assembly Mechanisms

Polymer Engineering &Science, EarlyView.
A printhead‐mounted plasma nozzle activates the PEEK melt and the borosilicate print‐bed at the instant of contact. Only this simultaneous in‐situ activation of both interfaces yields reliable first‐layer adhesion (0.22 MPa). ABSTRACT Fused deposition modeling of poly‐ether‐ether‐ketone (PEEK) requires a high‐temperature build plate, yet PEEK does not ...
Paul Sager, Nikolai Schuljak, Arne Bender, Rainer Adelung   +3 more
wiley   +1 more source

Coupled diabatic and frictional forcing of single‐layer vortical flow

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A single‐layer balanced model is used to illustrate how diabatic and frictional forcing of a primary balanced vortical flow can be coupled self‐consistently, including the advection of potential vorticity by the induced transverse circulation. The coupling is illustrated in the context of a developing tropical cyclone, in which boundary‐layer dynamics ...
R. K. Scott
wiley   +1 more source

River Ice Processes Modelling: A Comprehensive Review

River Research and Applications, EarlyView.
ABSTRACT River ice strongly influences hydrology, hydrodynamics, and ecosystems in cold regions, with an impact on flooding, hydropower generation, navigation, and aquatic habitats. Modeling river ice processes is therefore essential for both scientific understanding and operational management.
Harusha Abeynayake, Heli Yu, Epari Ritesh Patro, Ali Torabi Haghighi   +3 more
wiley   +1 more source

Non‐Alzheimer Aβ deposits in the human CNS: Implications with hypoxia and related conditions

Brain Pathology, EarlyView.
An Aβ deposit in a non‐Alzheimer's brain from an individual who experienced hypoxia/energy failure. Abstract We recently reported the deposition of Aβ in the frontal cortex of individuals who died of acute coronavirus disease 2019 (COVID‐19), or who did not have COVID‐19 but had respiratory distress, or infants with severe cardiac malformations.
Esma Karlovich, David S. Priemer, Charles Harker Rhodes, Daniel P. Perl, Kurenai Tanji, James E. Goldman   +5 more
wiley   +1 more source

The Influence of Hub Purge Flow Rate on Forced Response in a Low-Pressure Turbine

International Journal of Turbomachinery, Propulsion and Power
We present the results of a computational investigation into the influence of hub purge flow mass flow rate on the forcing amplitudes generated on a low-pressure turbine (LPT) rotor cascade by the upstream stator vane passing (SVP).
Alexander Trafford, Sina Stapelfeldt, Gustavo Lopes, Sergio Lavagnoli   +3 more
doaj   +1 more source