LINEAR PROPORTIONAL CONTROL HOT GAS VALVE FOR SECONDARY INJECTION,
Abstract
Two linear proportional control hot gas valves were tested as an integral component of a liquid rocket chamber bleed system. One valve relied entirely on the refractory metal, tantalumtungsten alloy (Ta-10W), whereas the second valve used an arrangement of internal heat sinks, ceramic insulators and ablative plastic inserts to serve as thermal protection for the tungsten surfaces of the critical components. The refractory metal valve failed after three seconds of operation due to severe degradation of the Ta-10W alloy components. In contrast, the composite materials valve successfully completed four 12 sec duration tests, representing 48 sec of accumulative throttling operation without any parts replacement. The valve demonstrated excellent structural durability and reproducible control capability during cyclic throttling. It is firmly believed this design is capable of at least 20 sec of continuous throttling operation under the design mass flows of 5140 F combustion gases. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1964
- Accession Number
- AD0433751
Entities
People
- F. P. Crommie
- W. F. Lehman
Organizations
- Picatinny Arsenal