Transient Thermal Performance of Multilayer Insulation Systems During Simulated Ascent Pressure Decay.
Abstract
Thermal tests were conducted to determine experimentally the transient heat flux and total integrated heat transferred to a liquid hydrogen tank during a simulated Saturn V ascent pressure decay. Three 30-layer helium purged multilayer insulations systems, comprised of (1) glass fiber paper or silk netting spacers between aluminized Mylar radiation shields and (2) fiber glass mat or sealed foam sublayers, were tested. All three insulation systems achieved space hold heat transfer conditions within 2 hours after initiation of pumpdown. The integrated heat transferred was approximately 25 percent greater than ideal, except for the system utilizing the foam sublayer which had not been optimized with regard to thickness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- ADA307926
Entities
People
- Irving E. Sumner
- Joseph E. Maloy
Organizations
- Glenn Research Center