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  • Organic Chemistry  (10,863)
  • Fluid Mechanics and Thermodynamics
  • 1980-1984  (3,421)
  • 1975-1979  (3,434)
  • 1950-1954  (2,106)
  • 1935-1939  (1,961)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Fluid valve with wide temperature range (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A fluid valve suitable for either metering or pressure regulating fluids at various temperatures is provided for a fuel system as may be utilized in an aircraft gas turbine engine. The valve includes a ceramic or carbon pad which cooperates with a window in a valve plate to provide a variable area orifice which remains operational during large and sometimes rapid variations in temperature incurred from the use of different fuels.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The Effect of Streamlining the Afterbody of an N.A.C.A. Cowling (1939)
    In:  CASI
    Details
    Publication Date: 2019-08-26
    Description: The drag and the power cost associated with the changing of the nose of a nacelle from a streamline shape to a conventional N.A.C.A. cowling shape was investigated in the N.A.C.A. 20-foot tunnel. Full-scale propellers and nacelles were used. The increment of drag associated with the change of nose shapes was found to be critically dependent on the afterbody of the nacelle. Two streamline afterbodies were tested. The results fo the tests with the more streamlined afterbody showed that the added drag due to the open-nose cowling was only one-fourth of the drag increase obtained with the other afterbody. The results of this research indicate that the power cost, in excess of that with a streamline nose, of using an N.A.C.A. cowling in front of a well-designed afterbody to enclose a 1,500-horsepower engine in an airplane with a speed of 300 miles per hour amounts to 1.5 percent of the engine power. If the open-nose cowling is credited with 1 percent because it cools the front of the cylinders, the non-useful power cost amounts to only 0.5 percent of the engine power.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-SR-136
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Boundary Layer Effect on the Surface Pressure of an Infinite Cone in Supersonic Flow (1951)
    In:  CASI
    Details
    Publication Date: 2019-08-26
    Description: The theory of Taylor and Maccoll (Ref,1) gives the surface pressure on an infinite cone in supersonic flow as a function of the cone vertex angle and the free stream Mach number and static pressure for a gas of vanishing viscosity. When a slender conical probe is used together with an impact pressure probe to determine the static pressure and Mach number in a low density gas stream, it is desirable to have some theoretical estimate of the effect of viscous boundary layer on the probe readings. Theoretical and experimental results with respect to impact probes have been presented in Refs. 5 and 6. A simple approximation for a conical probe based on linearized supersonic flow and compressible boundary layer theory is presented here.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: HE-150-80
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    NASA TECHNICAL REPORTS
  • 4
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    Pump Flow Analysis (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: Ingersoll-Rand Research, Inc.'s use of COSMIC's computer program MERIDL permits designers to evaluate performance and efficiency characteristics to be expected from the pump's impeller. It also provides information that enables a trained hydraulic engineer to make design improvements. Company was able to avoid the cost of developing new software and to improve some product design features.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1981; 85
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Aseptic fluid transfer system (1977)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: A method and means is provided, which permits the transfer of fluids between separate detached containers, in a manner which preserves the sterility of the fluids during and after their transfer.
    Keywords: Fluid Mechanics and Thermodynamics
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    NASA TECHNICAL REPORTS
  • 6
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    Heat Recovery System (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: Ball Metal's design of ducting and controls for series of roof top heat exchangers was inspired by Tech Briefs. Heat exchangers are installed on eight press and coating lines used to decorate sheet metal. The heat recovery system provides an estimated energy savings of more than $250,000 per year.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1984; 80
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Reclaiming Waste Heat (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: 'Air-O-Space' heater, based on spacecraft heat, requires no fuel other than electricity to run fan. Installed in chimney flue, heat pipes transfer heat from waste hot gases (but not the gases themselves) to fresh air blown across the other end of the pipes. It can transport roughly 500 times the heat flux of the best solid conductors with a temperature drop of less than 3 degrees per foot. This instrument has also been used by Kin-Tek Laboratories Inc. to produce an instrument to calibrate gas analyzers for air-pollution monitoring.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1976; 75
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Inboard seal mounting (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A regenerator assembly for a gas turbine engine has a hot side seal assembly formed in part by a cast metal engine block having a seal recess formed therein that is configured to supportingly receive ceramic support blocks including an inboard face thereon having a regenerator seal face bonded thereto. A pressurized leaf seal is interposed between the ceramic support block and the cast metal engine block to bias the seal wear face into sealing engagement with a hot side surface of a rotary regenerator matrix.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Gas Flow Controller (1980)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: The Mass Flowmeter is a device used to measure flow of oxygen in spacecraft's life support system. Tylan Corporation's Mass Flow Controller's major application is accurate control of reactive gases-- such as hydrogen, phosphine and silane as they are diffused at extremely high temperatures into silicon wafers. Wafers are ultimately cut up into integrated circuits or "chips" for electronic products. Precise process control afforded by the Mass Flow Controller makes it possible to produce circuit chips of greater performance at lower cost.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1980; 68
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Heat Transfer Research (1983)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A COSMIC (Computer Software Management and Information Center) program called RAVFAC (Radiation View Factor Program) enables Western Electric Company to study heat transfer processes to develop new manufacturing application. RAVFAC, Radiation View Factor Program is used in analyzing high temperature processing in manufacturing semiconductor wafers. It helps assess new designs by calculating heat transfer to determine temperature variation. The program has been extremely cost effective.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1983; 114
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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