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Flight characteristics of probes in the atmospheres of Mars, Venus, and the outer planetsDensity, pressure, and temperature profiles of an unknown planetary atmosphere can be obtained from the high-speed entry of a probe provided the aerodynamic characteristics of the probe in this atmosphere are accurately known. An investigation of the effect of gas composition on probe aerodynamics has been conducted in the Ames Hypersonic Free Flight Facility by gun launching small-scale models into atmospheres representative of Mars, Venus, Jupiter, and Saturn. Aerodynamic data at conditions matching the velocity and Reynolds number at a number of points on the Viking trajectory (Mars) were obtained in both air and carbon dioxide and significant differences were noted. Aerodynamic data are also presented from tests in hydrogen and hydrogen-helium mixtures, gases which characterize the atmospheres of the outer planets.
Document ID
19760063080
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Intrieri, P. F.
(NASA Ames Research Center Moffett Field, CA, United States)
Derose, C. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Kirk, D. B.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1976
Subject Category
Aerodynamics
Report/Patent Number
IAF PAPER 76-076
Meeting Information
Meeting: International Astronautical Congress
Location: Anaheim, CA
Start Date: October 10, 1976
End Date: October 16, 1976
Sponsors: International Astronautical Federation
Accession Number
76A46046
Distribution Limits
Public
Copyright
Other

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