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Modeling and Test Data Analysis of a Tank Rapid Chill and Fill System for the Advanced Shuttle Upper Stage (ASUS) ConceptThe Advanced Shuttle Upper Stage (ASUS) concept addresses safety concerns associated .with cryogenic stages by launching empty, and filling on ascent. The ASUS employs a rapid chill and fill concept. A spray bar is used to completely chill the tank before fill, allowing the vent valve to be closed during the fill process. The first tests of this concept, using a flight size (not flight weight) tank. were conducted at Marshall Space Flight Center (MSFC) during the summer of 2000. The objectives of the testing were to: 1) demonstrate that a flight size tank could be filled in roughly 5 minutes to accommodate the shuttle ascent window, and 2) demonstrate a no-vent fill of the tank. A total of 12 tests were conducted. Models of the test facility fill and vent systems, as well as the tank, were constructed. The objective of achieving tank fill in 5 minutes was met during the test series. However, liquid began to accumulate in the tank before it was chilled. Since the tank was not chilled until the end of each test, vent valve closure during fill was not possible. Even though the chill and fill process did not occur as expected, reasonable model correlation with the test data was achieved.
Document ID
20010069508
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Flachbart, Robin (NASA Marshall Space Flight Center Huntsville, AL United States)
Hedayat, Ali (Sverdrup Technology, Inc. Huntsville, AL United States)
Holt, Kimberly A. (NASA Marshall Space Flight Center Huntsville, AL United States)
Cruit, Wendy
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Space Transportation And Safety
Meeting Information
Meeting: Cryogenic Engineering Conference
Location: Madison, WI
Country: United States
Start Date: July 16, 2001
End Date: July 20, 2001
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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