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  • Fluid Mechanics and Thermodynamics  (1,237)
  • 2000-2004  (1,184)
  • 1960-1964  (53)
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  • 1
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    Minnowbrook III: 2000 Workshop on Boundary Layer Transition and Unsteady Aspects of Turbomachinery Flows (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-31
    Description: This volume and its accompanying CD-ROM contain materials presented at the Minnowbrook III-2000 Workshop on Boundary Layer Transition and Unsteady Aspects of Turbomachinery Flows held at the Syracuse University Minnowbrook Conference Center, Blue Mountain Lake, New York, August 20-23, 2000. Workshop organizers were John E. LaGraff (Syracuse University), Terry V Jones (Oxford University), and J. Paul Gostelow (University of Leicester). The workshop followed the theme, venue, and informal format of two earlier workshops: Minnowbrook I (1993) and Minnowbrook II (1997). The workshop was focused on physical understanding the late stage (final breakdown) boundary layer transition, separation, and effects of unsteady wakes with the specific goal of contributing to engineering application of improving design codes for turbomachinery. The workshop participants included academic researchers from the USA and abroad, and representatives from the gas-turbine industry and government laboratories. The physical mechanisms discussed included turbulence disturbance environment in turbomachinery, flow instabilities, bypass and natural transition, turbulent spots and calmed regions, wake interactions with attached and separated boundary layers, turbulence and transition modeling and CFD, and DNS. This volume contains abstracts and copies of the viewgraphs presented, organized according to the workshop sessions. The viewgraphs are included on the CD-ROM only. The workshop summary and the plenary-discussion transcripts clearly highlight the need for continued vigorous research in the technologically important area of transition, separated and unsteady flows in turbomachines.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA/CP-2001-210888 , E-12764 , NAS 1.55:210888 , NONP-NASA-CD-2002101352 , Minnowbrook III; Aug 20, 2000 - Aug 23, 2000; Blue Mountain Lake, NY; United States
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  • 2
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    Space Commercial Opportunities for Fluid Physics and Transport Phenomena Applications (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Microgravity research at NASA has been an undertaking that has included both science and commercial approaches since the late 80s and early 90s. The Fluid Physics and Transport Phenomena community has been developed, through NASA's science grants, into a valuable base of expertise in microgravity science. This was achieved through both ground and flight scientific research. Commercial microgravity research has been primarily promoted thorough NASA sponsored Centers for Space Commercialization which develop cost sharing partnerships with industry. As an example, the Center for Advanced Microgravity Materials Processing (CAMMP)at Northeastern University has been working with cost sharing industry partners in developing Zeolites and zeo-type materials as an efficient storage medium for hydrogen fuel. Greater commercial interest is emerging. The U.S. Congress has passed the Commercial Space Act of 1998 to encourage the development of a commercial space industry in the United States. The Act has provisions for the commercialization of the International Space Station (ISS). Increased efforts have been made by NASA to enable industrial ventures on-board the ISS. A Web site has been established at http://commercial/nasa/gov which includes two important special announcements. One is an open request for entrepreneurial offers related to the commercial development and use of the ISS. The second is a price structure and schedule for U.S. resources and accommodations. The purpose of the presentation is to make the Fluid Physics and Transport Phenomena community, which understands the importance of microgravity experimentation, aware of important aspects of ISS commercial development. It is a desire that this awareness will be translated into a recognition of Fluid Physics and Transport Phenomena application opportunities coordinated through the broad contacts of this community with industry.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Proceedings of the Fifth Microgravity Fluid Physics and Transport Phenomena Conference; 1972
    Format: text
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  • 3
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    Heat pipe systems using new working fluids (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The performance of a heat pipe system is greatly improved by the use of a dilute aqueous solution of about 0.0005 and about 0.005 moles per liter of a long chain alcohol as the working fluid. The surface tension-temperature gradient of the long-chain alcohol solutions turns positive as the temperature exceeds a certain value, for example about 40.degree. C. for n-heptanol solutions. Consequently, the Marangoni effect does not impede, but rather aids in bubble departure from the heating surface. Thus, the bubble size at departure is substantially reduced at higher frequencies and, therefore, increases the boiling limit of heat pipes. This feature is useful in microgravity conditions. In addition to microgravity applications, the heat pipe system may be used for commercial, residential and vehicular air conditioning systems, micro heat pipes for electronic devices, refrigeration and heat exchangers, and chemistry and cryogenics.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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  • 4
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    Experimental Observations of Aerodynamic and Heating Test on Insulating Heat Shields (1962)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Several different types of insulating heat shields have been subjected to aerodynamic tests and radiant-heating tests in order to obtain a better insight into the problems involved when the primary structure of m aerodynamically heated vehicle is substantially cooler than the exposed external surface. One of the main problems was considered to be a proper allowance for thermal expansion caused by these large temperature differences, so that undue distortion or thermal stresses would not occur in either the outer shield or the underlying structure. corrugated outer skin with suitably designed expansion joints was a feature of all the specimens tested.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA-TN-D-1237
    Format: application/pdf
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  • 5
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    Physical Sciences Research Priorities and Plans in OBPR (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: This paper presents viewgraphs of physical sciences research priorities and plans at the Office of Biological and Physical Sciences Research (OBPR). The topics include: 1) Sixth Microgravity Fluid Physics and Transport Phenomena Conference; 2) Beneficial Characteristics of the Space Environment; 3) Windows of Opportunity for Research Derived from Microgravity; 4) Physical Sciences Research Program; 5) Fundamental Research: Space-based Results and Ground-based Applications; 6) Nonlinear Oscillations; and 7) Fundamental Research: Applications to Mission-Oriented Research.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Sixth Microgravity Fluid Physics and Transport Phenomena Conference; 1; 1-11; NASA/CP-2002-211212/VOL1
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  • 6
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    NASA Research Announcement (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: This paper presents viewgraphs of NASA's strategic and fundamental research program at the Office of Biological and Physical Research (OBPR). The topics include: 1) Colloid-Polymer Samples; 2) Pool Boiling Experiment; 3) The Dynamics of Miscible Interfaces: A Space Flight Experiment (MIDAS); and 4) ISS and Ground-based Facilities.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Sixth Microgravity Fluid Physics and Transport Phenomena Conference; 1; 12-23; NASA/CP-2002-211212/VOL1
    Format: text
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  • 7
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    Microgravity Sciences Program Overview (2000)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: This overview presents in viewgraph form, the NASA Program organization regarding fluid physics, physical sciences research in space and the connection to biology, the dual thrust of the fluid physics program, and the immediate and future plans of the physical science research division.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Proceedings of the Fifth Microgravity Fluid Physics and Transport Phenomena Conference; 4-17
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  • 8
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    Propulsion and Power Generation (1963)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA-TM-X-50121
    Format: application/pdf
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  • 9
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    Existence of Solutions of One-Dimensional Flow of a Real Gas (1961)
    In:  CASI
    Details
    Publication Date: 2019-08-26
    Description: Formal solutions to the equations of motion of the one-dimensional, unsteady flow of a viscous, compressible, heat-conducting gas are presented. The relationship between the existence of these solutions and the problem of hydrodynamic stability is discussed.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: The Physics of Fluids; 4; 3; 360-361
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  • 10
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    Enhanced Damping for Capillary Bridge Oscillation Using Velocity Feedback (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: The stability of cylindrical liquid bridges in reduced gravity is affected by ambient vibrations of the spacecraft. Such vibrations are expected to excite capillary modes of the bridge. The lowest-order unstable mode is particularly susceptible to vibration as the length of the bridge approaches the stability limit. This low-order mode is known as the (2,0) mode and is an axisymmetric varicose mode of one wavelength in the axial direction. In this work, an optical system is used to detect the (2,0)-mode amplitude. The derivative of the error signal produced by this detector is used to produce the appropriate voltages on a pair of ring electrodes which are concentric with the bridge. A mode-coupled Maxwell stress profile is thus generated in proportional to the modal velocity. Depending on the sign of the gain, the damping of the capillary oscillation can be either increased or decreased. This effect has been demonstrated in Plateau-tank experiments. Increasing the damping of the capillary modes on free liquid surfaces in space could be beneficial for containerless processing and other novel technologies.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Strategic Research to Enable NASA's Exploration Missions Conference and Workshop: Poster Session, Volume 2; 503-508; NASA/CP-2004-213205/VOL2
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