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Record Details

Record 28 of 4084
Graphitic heat shields for solar probe missions
Author and Affiliation:
Lundell, J. H.(NASA Ames Research Center, Moffett Field, CA, United States)
Abstract: The feasibility of using a graphitic heat-shield system on a solar probe going to within 4 solar radii of the center of the sun is investigated. An analysis of graphite vaporization, with commonly used vaporization coefficients, indicates that the maximum mass-loss rate from a conical shield as large as 4 m in diameter can be kept low enough to avoid interference with measurements of the solar environment. In addition to the mass-loss problem, the problem of protecting the payload from the high-temperature (up to 2300 K) primary shield must be solved. An analysis of radiation exchange between concentric disks provides a technique for designing the intermediate shielding. The technique is applied to the design of a system for the Starprobe spacecraft, and it is found that a system with 10 shields and a payload surface temperature of 600 K will have a payload diameter of 2.45 m. Since this is 61% of the 4-m diameter of the primary shield, it is concluded that a graphitic heat-shield system is feasible for the Starprobe mission.
Publication Date: Jun 01, 1981
Document ID:
19810054664
(Acquired Nov 30, 1995)
Accession Number: 81A39068
Subject Category: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Report/Patent Number: AIAA PAPER 81-1056
Document Type: Conference Paper
Publisher Information: United States
Meeting Information: Thermophysics Conference; 16th; June 23-25, 1981; Palo Alto, CA
Meeting Sponsor: American Institute of Aeronautics and Astronautics
Financial Sponsor: NASA; United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 15p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GRAPHITE; HEAT SHIELDING; HIGH TEMPERATURE ENVIRONMENTS; SOLAR PROBES; VAPORIZING; DESIGN ANALYSIS; MASS TRANSFER; PAYLOADS
Imprint And Other Notes: American Institute of Aeronautics and Astronautics, Thermophysics Conference, 16th, Palo Alto, CA, June 23-25, 1981, 15 p.
Availability Source: Other Sources
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