SeaWiFS technical report series. Volume 10: Modeling of the SeaWiFS solar and lunar observations [PDF]
Post-launch stability monitoring of the Sea-viewing Wide Field-of-view Sensor (SeaWifs) will include periodic sweeps of both an onboard solar diffuser plate and the moon.
Barnes, Robert A. +7 more
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Numerical simulation of ice growth on a MS-317 swept wing geometry [PDF]
An effort to develop a 3-D ice accretion modeling method was initiated. This first step towards creation of a complete aircraft icing simulation code builds on previously developed methods for calculating 3-D flow fields and particle trajectories ...
Bidwell, C. S., Potapczuk, M. G.
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Optical measurement of unducted fan flutter [PDF]
A nonintrusive optical method is described for flutter vibrations in unducted fan or propeller rotors and provides detailed spectral results for two flutter modes of a scaled unducted fan. The measurements were obtained in a high-speed wind tunnel.
Kurkov, Anatole P., Mehmed, Oral
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Automatic computation of wing-fuselage intersection lines and fillet inserts with fixed-area constraint [PDF]
Procedures for automatic computation of wing-fuselage juncture geometry are described. These procedures begin with a geometry in wave-drag format. First, an intersection line is computed by extrapolating the wing to the fuselage.
Adams, Mary S., Barger, Raymond L.
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Three dimensional viscous analysis of a hypersonic inlet [PDF]
The flow fields in supersonic/hypersonic inlets are currently being studied at NASA Lewis Research Center using 2- and 3-D full Navier-Stokes and Parabolized Navier-Stokes solvers.
Benson, Thomas J. +3 more
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Surface grid generation for complex three-dimensional geometries [PDF]
An outline is presented for the creation of surface grids from primitive geometry data such as obtained from CAD/CAM systems. The general procedure is applicable to any geometry including full aircraft with wing, nacelle, and empennage. When developed in
Luh, Raymond Ching-Chung
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A computer program for the determination of the acoustic pressure signature of helicopter rotors due to blade thickness [PDF]
A computer program is presented for the determination of the thickness noise of helicopter rotors. The results were obtained in the form of an acoutic pressure time history.
Farassat, F., Mall, G. H.
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National Aeronautics and Space Administration (NASA)
The Grants Register 2021, 2018 semanticscholar +1 more source
Enhanced semantic segmentation in remote sensing images with SAR-optical image fusion (IF) and image translation (IT). [PDF]
Sci RepXu C, Geng Z, Wu L, Zhu D.
europepmc +1 more source