Analysis of the inadvertent reentry of the Cassini Spacecraft's Radioisotope Thermoelectric Generators

Details Analysis of the inadvertent reentry of the Cassini Spacecraft's Radioisotope Thermoelectric Generators Analysis of the inadvertent reentry of the Cassini Spacecraft's Radioisotope Thermoelectric Generators

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..458.1351d&link_type=abstract

Space technology and applications international forum -1999. AIP Conference Proceedings, Volume 458, pp. 1351-1358 (1999).

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Other Topics In Areas Of Applied And Interdisciplinary Physics, Thermoelectric, Electrogasdynamic And Other Direct Energy Conversion, Supersonic And Hypersonic Flows

Scientific paper

A rigorous multi-discipline approach has been developed to compute the aero/thermal/structural response of the Cassini Spacecraft's G_eneral P_urpose H_eat S_ource (GPHS) modules in the unlikely event of accidental reentry of the spacecraft during its Earth gravity-assist maneuver. A new r_eacting, a_blating, c_hemical e_quilibrium/nonequilibrium with r_adiation (RACER) full Navier-Stokes code is applied, along with an in-depth, transient-heating code, a nonlinear structural analysis code, and a six-degree-of-freedom flight-dynamics code. Attention is focused on the GPHS modules that would breakaway from the R_adioisotope T_hermoelectric G_enerators (RTGs) at high altitude. In addition, detailed analyses are performed to determine the survival/failure of the Graphite Impact Shells that would be released if the GPHS fails. The reentry velocity of the GPHS module (20 km/sec) is higher than any previously analyzed Earth reentry trajectory.

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