Modeling of bubbly and slug flow behavior under microgravity conditions /
1993 from experiment in the NASA Lewis Research Center
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | 1993 from experiment in the NASA Lewis Research Center Administration's (NASA) KC-135 aircraft. The present work is and the Suo & Griffith model, which studied the transition and validate the data was developed to achieve high levels of approximately equal to 0-g data for single-phase, bubbly and are shown. These last models were aimed at obtaining some bubbly/slug flows, with average errors not larger than 28%. bubbly/slug flows. However, for slug flows, the 0-g data bubbly/slug points, nine slug points, and three single-phase collected in 1992 aboard NASA's KC-135 aircraft. They were concerned with modeling of two-phase pressure drop under 0-g conditions, for bubbly and slug flow regimes in an adiabatic conditions. This model, which uses the Blasius Correlation, confidence. Two other sets of data, Dukler in 1988 and in developed to predict the pressure drop for particular flow digital imager observations were also investigated. These expected in spring 1995. experiments aboard the National Aeronautics and Space For slug flows, however, the errors were greater, with a from bubbly to slug flow. The applicability of these models Group (ITP) of Texas A&M University conducted two-phase flow included a quasi-homogeneous model, a separated flow model, initial scoping results in order to guide future experimental Learjet aircraft, are also analyzed. A homogeneous model was management as single-phase systems with lower mass, size and measured in a 10.4 1 -mm ID 1. 25 1 -m long glass tube during meet this need, the Interphase Transport Phenomena Laboratory over single-phase flow systems. Due to increased heat periods with acceleration levels in the range 0︢.05 g. The phase system for space, knowledge of the flow behavior in a pipe. Three sets of data were used in this study. The first points. These single- and two-phase pressure drop data were pressure drop correlations are, specifically, required. To procedures and hardware design. The next flights are pumping requirements. In order to correctly design a two- set, from the ITP group, included three bubbly points, nine transfer coefficients, they can achieve the same energy Two-phase flow systems for space applications have advantages value in average of 41 %. The 1 -g data were found to be was found to be accurate for single-phase, bubbly and were approximately 100% greater. Other models based on working fluid used was freon R-12. A methodology to correct zero-gravity (0-g) environment is necessary. Development of |
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| Item Description: | "Major subject: Nuclear Engineering". Vita. |
| Physical Description: | xiv, 98 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |