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  • AERODYNAMICS  (687)
  • BIOTECHNOLOGY
  • NAVIGATION
  • SPACE SCIENCES
  • 1985-1989  (629)
  • 1965-1969
  • 1960-1964  (331)
  • 1987  (629)
  • 1962  (331)
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  • 1985-1989  (629)
  • 1965-1969
  • 1960-1964  (331)
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  • 1
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    Some numerical calculations by using linear classical sonic theories approached from sub- or supersonic speeds (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The unsteady aerodynamics of a two-dimensional wing at sonic speed are studied by using so-called classical sonic theories (linear), approached from supersonic flow (M=1+0) or subsonic flow (M=1-0). In the former approach, the exact expressions of lift and lift distribution are obtained in terms of Fresnel integrals, while in the latter approach an integral equation must be solved, the kernel function of which is obtained from the subsonic Possio's equation and has a root singularity. The discrete analysis is adopted on the basis of the semicircle method (SCM) and the weighting function for subsonic-flow-Gauss-quadrature, as well as modified characteristics obtained from both approaches agree quite well with each other. The results obtained by the present computations are compared with those of DLM-C (subsonic 2D code) developed by ANDO et al, and are found to give a reasonable outer boundary for subsonic unsteady aerodynamics.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TT-20112 , NAS 1.77:20112
    Format: text
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  • 2
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    The Aerodynamic Optimization of Wings at Subsonic Speeds and the Influence of Wingtip Design (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Some of the objectives of modern aircraft development are related to the achievement of reduced fuel consumption and aircraft noise. This investigation is mainly concerned with the aerodynamic aspects of aircraft development, i.e., reduction of induced drag. New studies of wing design, and in particular wing tips, are considered. Induced drag is important since, in cruising flight, it accounts for approximately one-third of the entire drag for the aircraft, and one-half while climbing. A survey is presented for the wing geometries and wing tip designs studied, and theoretical investigations of different planar wings with systematically varied wing tip forms are conducted. Attention is also paid to a theoretical study of some planar and nonplanar wings and their comparison with experimental data.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-88534 , NAS 1.15:88534
    Format: application/pdf
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  • 3
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    Aeronautical engineering: A continuing bibliography with indexes (supplement 219) (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: This bibliography lists 586 reports, articles, and other documents introduced into the NASA scientific and technical information system in October, 1987.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-SP-7037(219) , NAS 1.21:7037(219)
    Format: application/pdf
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  • 4
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    Calculation of aerodynamic heat transfer for blunt-nosed thin wings at different angles of attack at supersonic speeds (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: A method for calculating aerodynamic heat transfer on thin wings at angles of attack is provided, based on the assumption of small cross flow and the calculation of an infinite cylinder. It is valid in the range of supersonic and hypersonic speeds. The method does not require calculation of the details of the stream lines and can be used for various swept wings at moderate angle of attack or yaw angle. A comparison between theoretical and experimental results is given.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TT-20127 , NAS 1.77:20127
    Format: text
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  • 5
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    The interference of the model support mast with measurements of the longitudinal and lateral aerodynamic coefficients (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The effects the single-bottom support masts used in the ONERA S1 and S4 wind tunnels have on aerodynamic data collected with scale model aircraft were examined experimentally and analytically. Systematic studies were performed on the flow characteristics around different diameters for the mounts. Scaling methods used to make data from one wind tunnel correspond to data from the other are described. Airbus 320 models were introduced into the tests and mast-body flow interactions were observed. A summary is presented of restrictions on the mast diameters, relative to cylindrical model diameters, which will minimize the effects the masts have on longitudinal and lateral aerodynamic stability data.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TT-20079 , NAS 1.77:20079 , ONERA-TP-1986-181
    Format: text
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  • 6
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    Hypersonic aerodynamic coefficients and convection flow estimation in a HERMES type project (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: An analysis of all the experimental and computation requirements of the HERMES project is presented. The discussion includes the influence of the upper atmosphere composition and possible chemical reactions, the information collected in Orbiter experiments, the possibility of utilizing plasma generators and CF4 in wind tunnel tests, the development of parabolized Navier-Stokes models and solutions, and the computing capacity requirements.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TT-20019 , NAS 1.77:20019
    Format: text
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  • 7
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    Stability characteristics of a supersonic boundary layer and their relation to the position of the laminar-turbulent transition point (1987)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-27
    Beschreibung: By comparing the calculated results with experimental data, it is demonstrated that the position of the laminar-boundary transition point of a boundary layer can be estimated by using the e-exp-n method. The effect of the Mach number, pressure gradient, and heat transfer on the laminar-turbulent transition is discussed. It is found that under conditions of strong cooling, the effect of the pressure gradient on the position of the transition point is less pronounced than in the absence of heat transfer.
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-88533 , NAS 1.15:88533
    Format: application/pdf
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  • 8
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    Space and the Scientific Community (1962)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-27
    Beschreibung: Nasa space programs - international cooperation
    Schlagwort(e): AERODYNAMICS
    Format: text
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  • 9
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    Experience with Mercury Spacecraft Systems (1962)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-14
    Beschreibung: Mercury spacecraft systems
    Schlagwort(e): SPACE SCIENCES
    Materialart: Proceedings of the National Meeting on Manned Space Flight: Unclassified Portion
    Format: text
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  • 10
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    Summary Results of the First United States Manned Orbital Space Flight (1962)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-14
    Beschreibung: Summary results of the first united states manned orbital space flight - ma-6
    Schlagwort(e): AERODYNAMICS
    Format: application/pdf
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