Rarefied-flow aerodynamics and thermosphere structure from Shuttle flight measurements

1986 ◽  
Vol 23 (1) ◽  
pp. 18-24 ◽  
Author(s):  
Robert C. Blanchard ◽  
Gregory M. Buck
Keyword(s):  
Rarefied Flow ◽  
Flight Measurements

Rarefied-Flow Transition Regime Orbiter Aerodynamic Acceleration Flight Measurements

1997 ◽  
Vol 34 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Robert C. Blanchard ◽  
Richard G. Wilmoth ◽  
Gerald J. LeBeau
Keyword(s):  
Transition Regime ◽  
Flow Transition ◽  
Rarefied Flow ◽  
Flight Measurements

Aerodynamic Flight Measurements and Rarefied-Flow Simulations of Mars Entry Vehicles

1997 ◽  
Vol 34 (5) ◽  
pp. 687-690 ◽  
Author(s):  
Robert C. Blanchard ◽  
Richard G. Wilmoth ◽  
James N. Moss
Keyword(s):  
Rarefied Flow ◽  
Flow Simulations ◽  
Flight Measurements

MSX satellite - Flight measurements of contaminant films

1998 ◽  
Author(s):  
B. Wood ◽  
D. Hall ◽  
J. Lesho ◽  
M. Boies ◽  
D. Silver ◽  
...  
Keyword(s):  
Flight Measurements

DSMC study of hypersonic rarefied flow using the Cercignani–Lampis–Lord model and a molecular-dynamics-based scattering database

2021 ◽  
Vol 33 (7) ◽  
pp. 072003
Author(s):  
Wenbin Liu ◽  
Jinbai Zhang ◽  
Yazhong Jiang ◽  
Laiwen Chen ◽  
Chun-Hian Lee
Keyword(s):  
Molecular Dynamics ◽  
Rarefied Flow

Cardiovascular and Valsalva responses during parabolic flight

1998 ◽  
Vol 85 (5) ◽  
pp. 1957-1965 ◽  
Author(s):  
Todd T. Schlegel ◽  
Edgar W. Benavides ◽  
Donald C. Barker ◽  
Troy E. Brown ◽  
Deborah L. Harm ◽  
...  
Keyword(s):  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Vascular Resistance ◽  
Human Subjects ◽  
Parabolic Flight ◽  
Cardiovascular Responses ◽  
Systematic Evaluation ◽  
Arterial Baroreflex ◽  
Baroreflex Control ◽  
Flight Measurements

We investigated the integrated cardiovascular responses of 15 human subjects to the acute gravitational changes (micro- and hypergravity portions) of parabolic flight. Measurements were made with subjects quietly seated and while subjects performed controlled Valsalva maneuvers. During quiet, seated, parabolic flight, mean arterial pressure increased during the transition into microgravity but decreased as microgravity was sustained. The decrease in mean arterial pressure was accompanied by immediate reflexive increases in heart rate but by absent (or later-than-expected) reflexive increases in total vascular resistance. Mean arterial pressure responses in Valsalva phases IIl, III, and IV were accentuated in hypergravity relative to microgravity ( P < 0.01, P < 0.01, and P < 0.05, respectively), but accentuations differed qualitatively and quantitatively from those induced by a supine-to-seated postural change in 1 G. This study is the first systematic evaluation of temporal and Valsalva-related changes in cardiovascular parameters during parabolic flight. Results suggest that arterial baroreflex control of vascular resistance may be modified by alterations of cardiopulmonary, vestibular, and/or other receptor activity.

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