Results 141 to 150 of about 619,388 (381)

Manufacturing a 9-Meter Thermoplastic Composite Wind Turbine Blade: Preprint

open access: yes, 2017
Currently, wind turbine blades are manufactured from a combination of glass and/or carbon fiber composite materials with a thermoset resin such as epoxy, which requires energy-intensive and expensive heating processes to cure.
Robynne E. Murray   +5 more
semanticscholar   +1 more source

Thermal–Hydraulic Performance of Nanofluids in Turbulent Separated Flow Induced by Double Forward Facing Step With Converging/Diverging Wall

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
Compared to experimental data of thermophysical properties of NFs, semi‐empirical models cannot estimate FOM correctly. For all working fluids, applying a converging channel instead of the canonical case was inefficient. Diverging channel was always favored compared to the canonical case. For less effective NFs, both lowering the reference velocity and
Mahmoud Jourabian, Mehrdad Raeesi
wiley   +1 more source

Blade by Blade Tip Clearance Measurement

open access: yesInternational Journal of Rotating Machinery, 2011
This paper describes a capacitance-based tip clearance measurement system which engineers have used in the most demanding turbine test applications.
A. G. Sheard
doaj   +1 more source

Early operation experience on the ERDA/NASA 100 kW wind turbine [PDF]

open access: yes
As part of the Energy Research and Development Administration (ERDA) wind energy program, NASA Lewis Research Center is testing an experimental 100-kW wind turbine.
Glasgow, J. C., Linscott, B. S.
core   +1 more source

Slot configuration for axial-flow turbomachinery blades [PDF]

open access: yes, 1972
Machining of slot in turbine blades of axial flow turbines to provide flow path between pressure and suction surfaces is discussed. Slot configuration and improvements in blade performance are described.
Taylor, W. E.
core   +1 more source

Dynamic stall of an experimental wind turbine blade

open access: yes, 2016
To understand the complex flow phenomena over wind turbine blades during stall development, a scaled three-dimensional non-rotating blade model is designed to be dynamically similar to a rotating full-scale NREL 5 MW wind turbine blade.
Matthew Melius, R. B. Cal, K. Mulleners
semanticscholar   +1 more source

Selective Functionalization of MWCNTs: Enhancing Wear Mechanisms and Friction‐Induced Graphitization in Epoxy Composites

open access: yesMacromolecular Materials and Engineering, EarlyView.
Incorporating 0.3 wt.% COOH‐functionalized MWCNTs, well dispersed via ultrasonication, into epoxy significantly enhances tribological and mechanical performance, reducing wear by 82% and COF by 32%. During sliding, friction breaks down MWCNTs into graphitic fragments, which are slowly released, forming a protective tribofilm.
Ravisrini Jayasinghe   +3 more
wiley   +1 more source

Laser-optical blade tip clearance measurement system [PDF]

open access: yes
A laser-optical measurement system was developed to measure single blade tip clearances and average blade tip clearances between a rotor and its gas path seal in rotating component rigs and complete engines.
Barranger, J. P., Ford, M. J.
core   +1 more source

VIBRATIONS OF A GROUP OF TURBINE BLADES

open access: yesJournal of Zosen Kiokai, 1932
The object of this investigation was to study mathematically the effect of the deck band on the natural frequency of turbine blades in a group which are mounted on the rim of a turbine wheel rotating with a constant speed.For the purpose of obtaining the result the method of combination of two kinds of frequencies, one of which is that for an elastic ...
openaire   +3 more sources

Investigating CMAS corrosion in ultrahigh temperature Hf6Ta2O17‐based thermal barrier coatings: A mechanism by which corrosion products hinder corrosion resistance

open access: yesMaterials Genome Engineering Advances, EarlyView.
During the corrosion of Hf6Ta2O17 by CMAS, stable corrosion products—CaTa2O6 and HfSiO4 form at the interface, which hinder further corrosion of Hf6Ta2O17 by CMAS. This mechanism successfully explains the excellent CMAS corrosion resistance of the Hf6Ta2O17 thermal barrier coating.
Qianqian Zhou   +3 more
wiley   +1 more source

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