Check Valve Anomaly Investigation for the Mars 2020 Spacecraft
Following launch of the Mars 2020 spacecraft July 30, 2020, a fault response safely re-configured the operational pumps for the cruise heat rejection system as a result of a larger-than-expected system temperature gradient. Further analysis and investigation determined the cause to be a stuck open check valve downstream of one of three pumps, allowing re-circulation through the pump itself and a reduced system flow rate. An in-flight characterization test confirmed the cause and cleared the check valve issue, returning the system to its as-designed flow rate. This investigation described here documents performance with and without re-circulation, possible causes for the check valve issue, characterization results, and improvements for future missions.
Note: This abstract previously submitted by Jackie Lyra and withdrawn. Being resubmitted for publication for 2023 conference.
Pradeep Bhandari, NASA Jet Propulsion Laboratory, USA
Keith Novak, NASA Jet Propulsion Laboratory, USA
Razmig Kandilian, NASA Jet Propulsion Laboratory, USA
Kaustabh Singh, NASA Jet Propulsion Laboratory, USA
Paul Karlmann, NASA Jet Propulsion Laboratory, USA
Mohamed Abid, NASA Jet Propulsion Laboratory, USA
Jacqueline Lyra, NASA Jet Propulsion Laboratory, USA
ICES101: Spacecraft and Instrument Thermal Systems
The 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.