Project Title:

Unstable Flow Experiments on Spacecraft

92-1-15.02-3800                                                   NAS03-26551
Unstable Flow Experiments on Spacecraft
Creare, Inc.
P.O. Box 71
Hanover, NH  03755
Paul H. Rothe                                        (603-643-3800)

Abstract:

     Terrestrial experience teaches that multiphase systems offer
advantages, such as light weight, compactness, and high
performance, over single-phase pumped loops. However, multiphase
systems on earth are dangerous because of their potential for
unstable behavior, failure in service, and rupture, which can
cause system damage and even personnel deaths. These unstable flow
phenomena are further complicated by the unknown effects of
microgravity, reduced gravity, and variable acceleration on the
stability of multiphase systems. Phase I of the project will
define which multiphase flow experiments to conduct to test the
reliable operation of spacecraft multiphase flow systems. The
overall objective of this project is to design critical
experiments that will effectively use the testing facilities at
NASA and will subsequently lead to design experiments to be
performed in space. Consequently, the science of microgravity
multiphase flow will be advanced, anticipating the technology
risks of multiphase systems for both thermal management and other
spacecraft systems.

Potential Commercial Application:

Potential Commercial Applications:  This project supports the
company's plan to commercialize equipment and engineering services
to NASA, DoD, and their prime contractors. It also contributes to
the evaluation of terrestrial multiphase systems found in
commercial facilities, including transportation of steam or
petroleum products, fossil power and chemical process plants, and
nuclear power stations.

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