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  • Organic Chemistry  (3,423)
  • AIRCRAFT PROPULSION AND POWER  (1,211)
  • SOLAR PHYSICS  (1,193)
  • 1975-1979  (5,827)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Numerical modeling of stimulation of induced magnetosphere during interaction of solar wind with the ionosphere of Venus (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Electrodynamic processes in the ionopause are examined as well as the structure of the induced magnetosphere.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-75921 , PR-351
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A broad look at solar physics adapted from the solar physics study of August 1975 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The current status of our knowledge of the basic mechanisms involved in fundamental solar phenomena is reviewed. These include mechanisms responsible for heating the corona, the generation of the solar wind, the particle acceleration in flares, and the dissipation of magnetic energy in field reversal regions, known as current sheets. The discussion covers solar flares and high-energy phenomena, solar active regions; solar interior, convection, and activity; the structure and energetics of the quiet solar atmosphere; the structure of the corona; the solar composition; and solar terrestrial interactions. It also covers a program of solar research, including the special observational requirements for spectral and angular resolution, sensitivity, time resolution, and duration of the techniques employed.
    Keywords: SOLAR PHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Investigation of air stream from combustor-liner air entry holes, 3 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Jets flowing from air entry holes of the combustor liner of a gas turbine were investigated. Cold air was supplied through the air entry holes into the primary hot gas flows. The mass flow of the primary hot gas and issuing jets was measured, and the behavior of the air jets was studied by the measurement of the temperature distribution of the gas mixture. The air jets flowing from three circular air entry holes, single streamwise long holes, and two opposing circular holes, parallel to the primary flow were studied along with the effects of jet and gas stream velocities, and of gas temperature. The discharge coefficient, the maximum penetration of the jets, the jet flow path, the mixing of the jets, and temperature distribution across the jets were investigated. Empirical expressions which describe the characteristics of the jets under the conditions of the experiments were formulated.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-75430 , NAL-TR-369
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Solar wind and magnetosphere interactions (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The relationship between the magnetosphere and the solar wind is addressed. It is noted that this interface determines how much of the solar plasma and field energy is transferred to the Earth's environment, and that this coupling not only varies in time, responding to major solar disturbances, but also to small changes in solar wind conditions and interplanetary field directions. It is recommended that the conditions of the solar wind and interplanetary medium be continuously monitored, as well as the state of the magnetosphere. Other recommendations include further study of the geomagnetic tail, tests of Pc 3,4 magnetic pulsations as diagnostics of the solar wind, and tests of kilometric radiation as a remote monitor of the auroral electrojet.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 346-364
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Effects of long-period solar activity fluctuation on temperature and pressure of the terrestrial atmosphere (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The present state of research on the influence of solar sunspot activity on tropospheric temperature and pressure is reviewed. The existence of an 11-year temperature cycle of 5 different types is affirmed. A cyclic change in atmospheric pressure, deducing characteristic changes between 11-year cycles is discussed. The existence of 80-year and 5-to-6-year cycles of temperature is established, and physical causes for birth are suggested.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-75345
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Propulsion-airframe interactions predictability (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An illustration of the possible magnitude of the transonic performance prediction problem is shown. These results derived from a careful and systematic set of tests run on a jet effects model, an aerodynamic and force model, and a pressure model, evaluated test techniques and wind tunnel effects. The results were then carefully compared with flight test data where significant discrepancies in zero-lift drag were observed. A vigorous review of the test techniques identified a number of potential error sources. Some of these were thought to be aircraft roughness and protuberances, tunnel anomalies, sting/model support corrections, and hot gas effects. In addition, there were questions on model metric splitline location and magnitude of corrections for scale and Reynolds number. Flight test inlet/engine characteristics were thought to differ, also, from those of the calibration settings in the ground facilities.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: AGARD Performance Prediction Methods; 20 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Low cycle fatigue in turbines (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Behavior of certain components at low-cycle fatigue is a parameter related to the conditions of use of turbines, to the technology of engine production and to the precision of its regulation. The laboratory takes this into account using data from sophisticated tests and rigorous analyses. The production plan includes careful examination of possible causes of premature rupture. This parameter has motivated the metallurgy industry to develop new materials and new technology.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-75264
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Aircraft fuel conservation technology. Task force report, September 10, 1975 (1975)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An advanced technology program is described for reduced fuel consumption in air transport. Cost benefits and estimates are given for improved engine design and components, turboprop propulsion systems, active control systems, laminar flow control, and composite primary structures.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-X-74295
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    The solar XUV He I and He II emission lines. I - Intensities and gross center-to-limb behavior (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The center-to-limb variation of the He II 304- and 256-A lines and He I 584- and 537-A lines is derived for different solar features, but averaged over the chromospheric supergranulation structure. The general trend is for limb brightening in quiet-sun regions, limb neutrality in unipolar magnetic regions (UMR), and limb darkening in polar coronal holes. The center-to-limb behavior in these optically thick emission lines indicates collisional excitation and decreasing transition-region temperature gradients with respect to optical depth in the sequence quiet sun to UMR to coronal hole.
    Keywords: SOLAR PHYSICS
    Type: PB80-118110 , Astrophysical Journal; vol. 220
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Fundamental Aspects of the Aerodynamics of Turbojet Engine Combustors (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Aerodynamic considerations in the design of high performance combustors for turbojet engines are discussed. Aerodynamic problems concerning the preparation of the fuel-air mixture, the recirculation zone where primary combustion occurs, the secondary combustion zone, and the dilution zone were examined. An aerodynamic analysis of the entire primary chamber ensemble was carried out to determine the pressure drop between entry and exit. The aerodynamics of afterburn chambers are discussed. A model which can be used to investigate the evolution of temperature, pressure, and rate and efficiency of combustion the length of the chamber was developed.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-75287 , ONERA-TP-1976
    Format: application/pdf
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