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Terrestrial And Microgravity Pool Boiling Heat Transfer And Critical Heat Flux Phenomenon In An Acoustic Standing Wave
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Book Synopsis Terrestrial and Microgravity Pool Boiling Heat Transfer and Critical Heat Flux Phenomenon in an Acoustic Standing Wave by : Rick Edward Moehrle
Download or read book Terrestrial and Microgravity Pool Boiling Heat Transfer and Critical Heat Flux Phenomenon in an Acoustic Standing Wave written by Rick Edward Moehrle and published by . This book was released on 1997 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723536205 Total Pages :292 pages Book Rating :4.5/5 (362 download)
Book Synopsis Bubble Dynamics, Two-Phase Flow, and Boiling Heat Transfer in Microgravity by : National Aeronautics and Space Administration (NASA)
Download or read book Bubble Dynamics, Two-Phase Flow, and Boiling Heat Transfer in Microgravity written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains two independent sections. Part one is titled Terrestrial and Microgravity Pool Boiling Heat Transfer and Critical heat flux phenomenon in an acoustic standing wave. Terrestrial and microgravity pool boiling heat transfer experiments were performed in the presence of a standing acoustic wave from a platinum wire resistance heater using degassed FC-72 Fluorinert liquid. The sound wave was created by driving a half wavelength resonator at a frequency of 10.15 kHz. Microgravity conditions were created using the 2.1 second drop tower on the campus of Washington State University. Burnout of the heater wire, often encountered with heat flux controlled systems, was avoided by using a constant temperature controller to regulate the heater wire temperature. The amplitude of the acoustic standing wave was increased from 28 kPa to over 70 kPa and these pressure measurements were made using a hydrophone fabricated with a small piezoelectric ceramic. Cavitation incurred during experiments at higher acoustic amplitudes contributed to the vapor bubble dynamics and heat transfer. The heater wire was positioned at three different locations within the acoustic field: the acoustic node, antinode, and halfway between these locations. Complete boiling curves are presented to show how the applied acoustic field enhanced boiling heat transfer and increased critical heat flux in microgravity and terrestrial environments. Video images provide information on the interaction between the vapor bubbles and the acoustic field. Part two is titled, Design and qualification of a microscale heater array for use in boiling heat transfer. This part is summarized herein. Boiling heat transfer is an efficient means of heat transfer because a large amount of heat can be removed from a surface using a relatively small temperature difference between the surface and the bulk liquid. However, the mechanisms that govern boiling heat transfer are not well understood. Measurements of wall te...
Book Synopsis Physical Science Under Microgravity: Experiments on Board the SJ-10 Recoverable Satellite by : Wenrui Hu
Download or read book Physical Science Under Microgravity: Experiments on Board the SJ-10 Recoverable Satellite written by Wenrui Hu and published by Springer Nature. This book was released on 2019-10-16 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the physical science experiments in a space microgravity environment conducted on board the SJ-10 recoverable satellite, which was launched on April 6th, 2016 and recovered on April 18th, 2016. The experiments described were selected from ~100 proposals from various institutions in China and around the world, and have never previously been conducted in the respective fields. They involve fluid physics and materials science, and primarily investigate the kinetic properties of matter in a space microgravity environment. The book provides a comprehensive review of these experiments, as well as the mission’s execution, data collection, and scientific outcomes.
Book Synopsis Acoustic Driven Nucleate Pool Boiling Heat Transfer in Terrestrial and Microgravity Environments by : Jeffrey S. Sitter
Download or read book Acoustic Driven Nucleate Pool Boiling Heat Transfer in Terrestrial and Microgravity Environments written by Jeffrey S. Sitter and published by . This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1998 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Subcooled Pool Boiling Heat Transfer Mechanisms in Microgravity: Terrier-Improved Orion Sounding Rocket Experiment by :
Download or read book Subcooled Pool Boiling Heat Transfer Mechanisms in Microgravity: Terrier-Improved Orion Sounding Rocket Experiment written by and published by . This book was released on 2000 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Boiling Experiment Facility for Heat Transfer Studies in Microgravity by : Richard Delombard
Download or read book Boiling Experiment Facility for Heat Transfer Studies in Microgravity written by Richard Delombard and published by BiblioGov. This book was released on 2013-07 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pool boiling in microgravity is an area of both scientific and practical interest. By conducting tests in microgravity, it is possible to assess the effect of buoyancy on the overall boiling process and assess the relative magnitude of effects with regards to other "forces" and phenomena such as Marangoni forces, liquid momentum forces, and microlayer evaporation. The Boiling eXperiment Facility is now being built for the Microgravity Science Glovebox that will use normal perfluorohexane as a test fluid to extend the range of test conditions to include longer test durations and less liquid subcooling. Two experiments, the Microheater Array Boiling Experiment and the Nucleate Pool Boiling eXperiment will use the Boiling eXperiment Facility. The objectives of these studies are to determine the differences in local boiling heat transfer mechanisms in microgravity and normal gravity from nucleate boiling, through critical heat flux and into the transition boiling regime and to examine the bubble nucleation, growth, departure and coalescence processes. Custom-designed heaters will be utilized to achieve these objectives.
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781793902245 Total Pages :26 pages Book Rating :4.9/5 (22 download)
Book Synopsis Boiling Experiment Facility for Heat Transfer Studies in Microgravity by : National Aeronautics and Space Adm Nasa
Download or read book Boiling Experiment Facility for Heat Transfer Studies in Microgravity written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-14 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pool boiling in microgravity is an area of both scientific and practical interest. By conducting tests in microgravity, it is possible to assess the effect of buoyancy on the overall boiling process and assess the relative magnitude of effects with regards to other "forces" and phenomena such as Marangoni forces, liquid momentum forces, and microlayer evaporation. The Boiling eXperiment Facility is now being built for the Microgravity Science Glovebox that will use normal perfluorohexane as a test fluid to extend the range of test conditions to include longer test durations and less liquid subcooling. Two experiments, the Microheater Array Boiling Experiment and the Nucleate Pool Boiling eXperiment will use the Boiling eXperiment Facility. The objectives of these studies are to determine the differences in local boiling heat transfer mechanisms in microgravity and normal gravity from nucleate boiling, through critical heat flux and into the transition boiling regime and to examine the bubble nucleation, growth, departure and coalescence processes. Custom-designed heaters will be utilized to achieve these objectives. Delombard, Richard and McQuillen, John and Chao, David Glenn Research Center 825080.04.02.20.07
Book Synopsis Critical Heat Flux for Saturated Pool Boiling from Horizontal and Vertical Wires in Reduced Gravity by : Robert Siegel
Download or read book Critical Heat Flux for Saturated Pool Boiling from Horizontal and Vertical Wires in Reduced Gravity written by Robert Siegel and published by . This book was released on 1965 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Critical Heat Flux in an Accelerating Pool Boiling System by : Jim Mills Adams
Download or read book A Study of the Critical Heat Flux in an Accelerating Pool Boiling System written by Jim Mills Adams and published by . This book was released on 1962 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancement of Pool Boiling Heat Transfer and Control of Bubble Motion in Microgravity Using Electric Fields (BCOEL) by :
Download or read book Enhancement of Pool Boiling Heat Transfer and Control of Bubble Motion in Microgravity Using Electric Fields (BCOEL) written by and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zero- and Reduced-gravity Simulation on a Magnetic-colloid Pool-boiling System by : S. Stephen Papell
Download or read book Zero- and Reduced-gravity Simulation on a Magnetic-colloid Pool-boiling System written by S. Stephen Papell and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Dynamics and Heat Transfer in Pool Boiling on Wires at Different Gravity by : Jian-Fu Zhao
Download or read book Bubble Dynamics and Heat Transfer in Pool Boiling on Wires at Different Gravity written by Jian-Fu Zhao and published by . This book was released on 2011 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of experimental studies on bubble dynamical behaviors and heat transfer in pool boiling on thin wires in different gravity conditions have been performed in the past years, including experiments in long-term microgravity aboard the 22nd Chinese recoverable satellite RS-22, in short-term microgravity in the drop tower Beijing, and in normal gravity on the ground. Steady pool boiling of degassed R113 on thin platinum wires has been studied using a temperature-controlled heating method. A voltage-controlled heating method has also been used in normal gravity. A slight enhancement of nucleate boiling heat transfer is observed in microgravity, while dramatic changes of bubble behaviors are very evident. Considering the influence of the Marangoni effects, the different characteristics of bubble behaviors in microgravity have been explained. A new bubble departure model including the influence of the Marangoni effects has also been proposed, which can predict the whole observation both in microgravity and in normal gravity. The value of CHF (critical heat flux) in microgravity is lower than that in normal gravity, but it can be predicted well by the Lienhard-Dhir correlation, although the dimensionless radius, or the square root of the Bond number, in the present case is far beyond its initial application range. A further revisit on the scaling of CHF with heater radius in normal gravity, which is focused on the case of a small Bond number, has also been performed in our laboratory using different kinds of working fluids at different subcooling conditions. Interactions between the influences of the subcooling and heater radius will be important for the case of a small Bond number. In addition to the Bond number, there may exist some other parameters, which may be material-dependent, that play important roles in the CHF phenomenon with a small Bond number.
Book Synopsis Electrohydrodynamic Pool Boiling Heat Transfer in Microgravity by : Charles Akira Murakami
Download or read book Electrohydrodynamic Pool Boiling Heat Transfer in Microgravity written by Charles Akira Murakami and published by . This book was released on 2004 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement and Prediction of the Pool Boiling Critical Heat Flux in Highly Wetting Liquids by : Abhay Ashok Watwe
Download or read book Measurement and Prediction of the Pool Boiling Critical Heat Flux in Highly Wetting Liquids written by Abhay Ashok Watwe and published by . This book was released on 1996 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heater Geometry and Heat Flux Effects on Subcooled, Thin Wire, Nucleate Pool Boiling in Microgravity by : Troy Munro
Download or read book Heater Geometry and Heat Flux Effects on Subcooled, Thin Wire, Nucleate Pool Boiling in Microgravity written by Troy Munro and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: PUBLIC ABSTRACT: The purpose of this thesis is to study the effects of microgravity, surface geometry, and heat dissipation per unit area (heat flux) on boiling heat transfer. Boiling is able to move a significant amount of heat for a small area in comparison to other heat transfer methods. Space systems could benefit from the development of thermal management systems that use boiling heat transfer because they would be smaller, more robust, and less expensive. However, boiling is an extremely complicated process which has no comprehensive models to predict its behavior. Multiple correlations have been developed which relate heat transfer efficiencies to various system parameters, but they can only be applied to specific heat transfer systems, lack considerations for the actual mechanisms involved in boiling, and give erroneous results if used beyond their limited applications. This research concluded that twisting thin wire heaters creates crevices that reduce the amount of heat needed to make the system boil. This is particularly beneficial in microgravity because heat transfer prior to boiling is very inefficient. Additionally, this study characterized the observation of a new mode of jet flows, which results in many small bubbles leaving the wire and creates a fluid flow that would not normally exist in microgravity. The results of this study show that sustained boiling can exist in microgravity and in some instances can be more effective than boiling in terrestrial gravity.
Book Synopsis Pool and External Flow Boiling by : V. K. Dhir
Download or read book Pool and External Flow Boiling written by V. K. Dhir and published by . This book was released on 1992 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
