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  • Books
  • Articles  (1)
  • Other Sources  (3)
  • OCEANOGRAPHY  (2)
  • 07.77  (1)
  • AERODYNAMICS  (1)
  • 1985-1989  (4)
  • 1986  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Analysis of compression and burn of ion-beam inertial fusion targets including radiation transport (1986)
    Springer
    The European physical journal 325 (1986), S. 99-114 
    Details
    ISSN: 1434-601X
    Keywords: 28.50Re ; 52.55 ; 07.77
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents implosion results of a new ion-beam inertial fusion target which has been designed for use in a reactor study, HIBALL-II. This target has been simulated using an updated version of the MEDUSA-KA code which includes radiation transport. The target contains 4 mg of DT fuel which is protected against radiative preheat by a high-Z, high-ρ lead radiation shield. The radiation shield is separated from the fuel by a reasonable thickness of lithium to improve the hydrodynamic stability. The target is driven by 10GeV Bi++ ions and the peak power in the pulse is 500 TW. The total input energy is ∼ 4.38 MJ and the gain is ∼ 152.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294249
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    Paper (German National Licenses)
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  • 2
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    A study of the relationship among wind speed, sea state, and the drag coefficient for a developing wave field (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Controlled laboratory experiments are reported which demonstrate directly and quantitatively the influence of wave conditions in determining the drag law at the air-sea interface under neutral stability conditions. It is concluded that the analytic form first proposed by Kitaigorodskii (1970) models the roughness scale very well when the sea is dominated by the locally generated waves. It is demonstrated that, by using a unified two-parameter wave spectral model by Huang et al. (1981), Kitaigorodskii's result can be shown to contain the formulas of Charnock (1955) and Hsu (1974) as special cases. The results also identify two wind and wave-related parameters as important in determining the drag coefficient for developing wave fields.
    Keywords: OCEANOGRAPHY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 91; 7733-774
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Large-scale short-period sea ice atmosphere interaction (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Changes in the microwave brightness temperature measured by the Electrically Scanning Microwave Radiometer (ESMR) flown on board the Nimbus V satellite reveal large-scale sea ice fluctuations in the Antarctic marginal ice zone. These ice margin fluctuations arre predominantly wave numbers 1-4, with phase speeds of about 3 m/s independent of wave number. The spatial pattern and eastward advection of the sea ice anomalies match those of the atmospheric sea level pressure, and are consistent with sea ice displacement due to surface wind stress. Examination of the outgoing longwave radiation indicates that suppression of high clouds in regions of increased sea ice inc reases the radiative cooling which contributes to maintaining the ice. Data from three winter seasons indicate about a one-third probability of occurence of this large scale high frequency sea ice atmosphere interaction during any given 2-week period in winter.
    Keywords: OCEANOGRAPHY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 91; 10709-10
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    An Euler aerodynamic method for leading-edge vortex flow simulation (1986)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The current capabilities and the future plans for a three dimensional Euler Aerodynamic Method are described. The basic solution algorithm is based on the finite volume, Runge-Kutta pseudo-time-stepping scheme of FLO-57. Several modifications to improve accuracy and computational efficiency were incorporated and others are being investigated. The computer code is used to analyze a cropped delta wing at 0.6 Mach number and an arrow wing at 0.85 Mach number. Computed aerodynamic parameters are compared with experimental data. In all cases, the configuration is impulsively started and no Kutta condition is applied at sharp edges. The results indicate that with additional development and validation, the present method will be a useful tool for engineering analysis of high speed aircraft.
    Keywords: AERODYNAMICS
    Type: NASA. Langley Research Center Vortex Flow Aerodynamics, Vol. 1; p 263-281
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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