An Investigation of the First-Pulse Characteristics of Monopropellant Hydrazine Reactors,
Abstract
A series of experiments was conducted to characterize the first-pulse startup of monopropellant hydrazine thrusters, using spontaneous catalyst and the results of these experiments are analyzed. Typical reactor dynamics are presented as approximations in simulating spacecraft control system dynamics. Possible reasons for first-pulse pressure spiking are explored as an approach toward controlling or alleviating catalyst pulverization. Some variables investigated include the following: injector/catalyst configuration and initial temperature, vacuum exposure time and catalyst degassing, thrust level, and water immersion. Potential problems of propellant valve leakage and injector clogging are also discussed. Several apparent trends are postulated from the test results but additional study is needed for a clear understanding of the mechanisms involved. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 30, 1969
- Accession Number
- AD0859733
Entities
People
- Harold Greer
Organizations
- The Aerospace Corporation