scholarly journals The proton and electron radiation belts at geosynchronous orbit: Statistics and behavior during high-speed stream-driven storms

2016 ◽  
Vol 121 (6) ◽  
pp. 5449-5488 ◽  
Author(s):  
Joseph E. Borovsky ◽  
Thomas E. Cayton ◽  
Michael H. Denton ◽  
Richard D. Belian ◽  
Roderick A. Christensen ◽  
...  
Keyword(s):  
High Speed ◽  
Radiation Belts ◽  
Geosynchronous Orbit ◽  
Electron Radiation ◽  
High Speed Stream ◽  
And Behavior

scholarly journals High-speed stream impacts on the equatorial ionization anomaly region during the deep solar minimum year 2008

2012 ◽  
Vol 117 (A10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jing Liu ◽  
Libo Liu ◽  
Biqiang Zhao ◽  
Yong Wei ◽  
Lianhuan Hu ◽  
...  
Keyword(s):  
Solar Minimum ◽  
High Speed ◽  
High Speed Stream ◽  
Equatorial Ionization Anomaly ◽  
Anomaly Region

scholarly journals Formation of electron radiation belts at Saturn by Z-mode wave acceleration

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
E. E. Woodfield ◽  
R. B. Horne ◽  
S. A. Glauert ◽  
J. D. Menietti ◽  
Y. Y. Shprits ◽  
...  
Keyword(s):  
Radiation Belts ◽  
Electron Radiation ◽  
Mode Wave

Visualization and Time-Resolved Particle Image Velocimetry Measurements of the Flow in the Tip Region of a Subsonic Compressor Rotor

2014 ◽  
Vol 137 (4) ◽  
Author(s):  
David Tan ◽  
Yuanchao Li ◽  
Ian Wilkes ◽  
Rinaldo L. Miorini ◽  
Joseph Katz
Keyword(s):  
Flow Rate ◽  
High Speed ◽  
Axial Compressor ◽  
Time Resolved ◽  
Tip Leakage ◽  
Compressor Rotor ◽  
Direct Measurements ◽  
Image Velocimetry ◽  
The One ◽  
And Behavior

A new optically index matched facility has been constructed to investigate tip flows in compressor-like settings. The blades of the one and a half stage compressor have the same geometry, but lower aspect ratio as the inlet guide vanes (IGVs) and the first stage of the low-speed axial compressor (LSAC) facility at NASA Glenn. With transparent blades and casings, the new setup enables unobstructed velocity measurements at any point within the tip region and is designed to facilitate direct measurements of effects of casing treatments on the flow structure. We start with a smooth endwall casing. High speed movies of cavitation and time-resolved PIV measurements have been used to characterize the location, trajectory, and behavior of the tip leakage vortex (TLV) for two flow rates, the lower one representing prestall conditions. Results of both methods show consistent trends. As the flow rate is reduced, TLV rollup occurs further upstream, and its initial orientation becomes more circumferential. At prestall conditions, the TLV is initially aligned slightly upstream of the rotor passage, and subsequently forced downstream. Within the passage, the TLV breaks up into a large number of vortex fragments, which occupy a broad area. Consequently, the cavitation in the TLV core disappears. With decreasing flow rate, this phenomenon becomes more abrupt, occurs further upstream, and the fragments occupy a larger area.

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