Buckling of a beam extruded into highly viscous fluid
, 2014 Inspired by microscopic paramecies which use trichocyst extrusion to propel themselves away from thermal aggressions, we propose a macroscopic experiment to study the stability of a slender beam extruded in a highly viscous fluid.
Gosselin, Frederick . P. +2 more
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Diagnostic monitoring of drivetrain in a 5 MW spar-type floating wind turbine using Hilbert spectral analysis [PDF]
, 2017 The objective of this paper is to investigate the frequency-based fault detection of a 5MW spar-type floating wind turbine (WT) gearbox using measurements of the global responses.
Blanke, Mogens +4 more
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Effects of thermal conduction in sonoluminescence [PDF]
, 1962 Current experimental results indicate that sonoluminescence is largely thermal in origin, with the spectra showing a direct relation between luminous intensity and the temper ature s generated inside the collapsing cavitation bubbles.
Hickling, Robert
core
Effects of Boundary-Layer Ingestion on the Aero-Acoustics of Transonic Fan Rotors [PDF]
, 2018 The use of boundary-layer-ingesting, embedded propulsion systems can result in inlet flow distortions where the interaction of the boundary-layer vorticity and the inlet lip causes horseshoe vortex formation and the ingestion of streamwise vortices into ...
Defoe, Jeffrey James +1 more
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A Study of the Role of Organized Structures in Jet Noise Generation [PDF]
, 2003 We present analytical, experimental and computational studies aimed at understanding the role of large-scale, organized structures in noise generation from high-speed, compressible jets.
Colonius, T. +3 more
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Open Rotor Noise Prediction at NASA Langley - Capabilities, Research and Development [PDF]
The high fuel prices of recent years have caused the operating cost of the airlines to soar. In an effort to bring down the fuel consumption, the major aircraft engine manufacturers are now taking a fresh look at open rotors for the propulsion of future ...
Farassat, Fereidoun
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Acoustics Division recent accomplishments and research plans [PDF]
The research program currently being implemented by the Acoustics Division of NASA Langley Research Center is described. The scope, focus, and thrusts of the research are discussed and illustrated for each technical area by examples of recent technical ...
Clark, L. R., Morgan, H. G.
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The effect of flow oscillations on cavity drag [PDF]
, 1987 An experimental investigation of flow over an axisymmetric cavity shows that self-sustained, periodic oscillations of the cavity shear layer are associated with low cavity drag.
Gharib, M., Roshko, A.
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Analytical continuation of two-dimensional wave fields. [PDF]
Proc Math Phys Eng Sci, 2021 Assier RC, Shanin AV.
europepmc +1 more source
Surface Integral Analogy Approaches to Computing Noise Generated by a 3D High-Lift Wing Configuration [PDF]
, 2012 Three surface integral approaches of the acoustic analogies are studied to predict the noise from a three-dimensional, high-lift wing configuration. The approaches refer to the Kirchhoff method, the Ffowcs Williams and Hawkings method of the permeable ...
Davidson, Lars +5 more
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