Author: Bernadette UpshawPublisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
Statistical Analysis of Microgravity Experiment Performance Using the Degrees of Success Scale
Author: Bernadette UpshawScientific and Technical Aerospace Reports
Author: Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1100
Book Description
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1100
Book Description
Government Reports Announcements & Index
Author: Guide to U.S. Government Statistics
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1384
Book Description
A directory of U.S. government statistics publications by issuing agency. Entries include GPO stock number, LC and Dewey classification, OCLC and ISSN numbers, and sometimes a description. Includes geographic index.
International Aerospace Abstracts
Author: Assessment of Directions in Microgravity and Physical Sciences Research at NASA
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309086396
Category : Science
Languages : en
Pages : 123
Book Description
For thirty years the NASA microgravity program has used space as a tool to study fundamental flow phenomena that are important to fields ranging from combustion science to biotechnology. This book assesses the past impact and current status of microgravity research programs in combustion, fluid dynamics, fundamental physics, and materials science and gives recommendations for promising topics of future research in each discipline. Guidance is given for setting priorities across disciplines by assessing each recommended topic in terms of the probability of its success and the magnitude of its potential impact on scientific knowledge and understanding; terrestrial applications and industry technology needs; and NASA technology needs. At NASA's request, the book also contains an examination of emerging research fields such as nanotechnology and biophysics, and makes recommendations regarding topics that might be suitable for integration into NASA's microgravity program.
Statistical Analysis of Microgravity Two-Phase Slug Flow Via the Drift Flux Model
Author: Benjamin Andrew LarsenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The current knowledge of flow parameters for terrestrial two-phase flow was developed through experiments that collected hundreds to thousands of data points. However, the cost associated with microgravity testing make collecting such amounts of microgravity two-phase flow data difficult. Multiple researchers have postulated the microgravity drift flux model parameters to predict void fraction, however, these methods were initially developed with no consideration given to a microgravity environment. The purpose of this thesis was to develop a process by which results from multiple microgravity experiments can be compared on a similar medium and used to develop a larger viable data set than what was previously available and to reliably calculate a value for the void fraction from the available data. Development of multiphase systems for microgravity requires accurate prediction methods. Utilizing data from multiple microgravity two-phase flow experiments, a statistically consistent slug flow database has been created. The data from 13 different microgravity two-phase flow experiments was vetted using a combination of parametric and non-parametric statistical tests to develop a valid model for the drift flux parameters that meet the axioms of a linear model. The result was a statistically consistent microgravity slug flow data base consisting of 220 data points from 8 different experiments and the associated values for the concentration parameter, Co, and drift velocity, u[subscript]gj. A key component for this model was redefining the assumptions in the drift flux model to accurately represent microgravity conditions in calculating the drift flux parameters. The resultant drift flux parameters are a distribution parameter, Co = 1.336 ± 0.013 and a drift velocity, u[subscript]gj = -0.126 ± 0.020. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152740
Author: