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  • Other Sources  (65)
  • GEOPHYSICS  (51)
  • FLUID MECHANICS  (14)
  • Chemical Engineering
  • 2005-2009
  • 1970-1974  (65)
  • 1
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    Artificial auroral experiment - Experiment and principal results (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Artificial auroral experiment by Aerobee rocketborne electron accelerator generated monoenergetic electron beam injection onto magnetospheric field
    Keywords: GEOPHYSICS
    Type: ; 367-414. (
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  • 2
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    Ground pattern analysis in the Great Plains (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: There are no author-identified significant results in this report.
    Keywords: GEOPHYSICS
    Type: REPT-2266-7 , Kansas Environ. and Resource Study: A Great Plains Model; 7 p
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  • 3
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    Two successful geomagnetic-field-line tracing experiments. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Two field-line tracing experiments were conducted on an L = 1.26 magnetic flux tube over Kauai, Hawaii. Barium vapor was created by the detonation of a highly explosive shaped charge aligned with the geomagnetic field at a 467-km altitude. Barium ions traveled along the field line to the conjugate ionosphere in a tube 3 to 5 km in diameter, producing a visible streak along the entire 6900-km path length. Electric fields perpendicular to the magnetic field caused the ions to drift away from the true conjugate during transit, but extrapolation from subsequent ion drift rates allowed the conjugate to be identified and compared with several field models. Differing ion drift rates and directions at the conjugate points indicated that the electric field is not transferred unattenuated along field lines.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 77; June 1
    Format: text
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  • 4
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    Observations of fast auroral waves. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Results of simultaneous observation of a fast wave event from the Ester Dome Observatory (EDO) near College, Alaska, the Poker Flat Rocket Launching Facility (PKR), and Fort Yukon, Alaska (FYU). The display occurred on Mar. 27, 1971, and the general morphology is described and discussed. It is suggested that fast auroral waves occur when a preceding substorm has enhanced the particle population in the region of the magnetosphere near L = 6 in the midnight sector; then transverse hydromagnetic waves, associated with the onset of further local substorm activity, become visible through their action on this enhanced particle population as they propagate inwards in the equatorial region.
    Keywords: GEOPHYSICS
    Type: Planetary and Space Science; 20; Mar. 197
    Format: text
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  • 5
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    The resolution of temporal and spatial variations in auroral particle measurements from sounding rockets (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The problems involved in the resolution of the temporal/spatial ambiguity in sounding rocket observations are discussed with reference to an experiment involving a mother-daughter rocket combination, together with a flashing light beacon on the rocket and television cameras on the ground. The ambiguity was successfully removed, enabling a proper interpretation of the observations of precipitating low energy electrons to be made.
    Keywords: GEOPHYSICS
    Type: ESRO European Sounding-Rocket and Related Res. at High Latitudes; p 113-118
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  • 6
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    Three-dimensional compressible laminar boundary layers on sharp and blunt circular cones at angle of attack (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A method for solving the three-dimensional compressible laminar boundary layer equations for the case of a circular cone and a sphere-cone body at an angle of attack is presented. The governing equations are modified by a similarity type transformation and then transformed into a Crocco-type form. The resulting set of equations is solved simultaneously by an iterative method using an implicit finite difference scheme by means of an efficient algorithm for equations of tridiagonal form. The effects of streamline swallowing on a sharp cone are included by introducing the true inviscid edge conditions at the distance from the wall equal to the boundary layer thickness. The validity of the approach was established by comparison of the computational results with similar results by other methods and with experimental data. It was concluded that at sufficiently high Mach number and moderate to large angles of attack, the streamline swallowing effects on a sharp cone result in higher values of skin friction and heat transfer as compared with the classical results for constant entropy.
    Keywords: FLUID MECHANICS
    Type: NASA-CR-112316
    Format: application/pdf
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  • 7
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    The use of Levy-Lees variables in three-dimensional boundary-layer flows (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A method for solving a general class of three-dimensional boundary layer flows is developed. In the development, Levy-Lees variables are extended to three dimensions and equations are placed in these similarity variables. An implicit finite difference scheme which is stable for negative transverse velocities is used to solve these equations. The method developed is applied to obtain solutions for sharp and spherically blunted circular cones at angle of attack. Longitudinal and transverse distributions are presented for these cases. Good agreement is found with the results obtained by other numerical schemes and the experimental data of Tracy, for sharp circular cones at angle of attack. For spherically blunted cones at angle of attack, the results are in good agreement with axisymmetric sphere results up to the region where spherical symmetry holds.
    Keywords: FLUID MECHANICS
    Type: NASA-CR-112315
    Format: application/pdf
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  • 8
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    Ring baffle pressure distribution and slosh damping in large cylindrical tanks (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An investigation was conducted to determine the pressure loads and damping associated with rigid ring baffles in relatively large cylindrical tanks. The radial and circumferential pressure distribution, as well as the damping, was measured on a ring baffle subjected to fundamental antisymmetric slosh in a 284-cm-diameter rigid tank. Experimental and analytical data are presented as a function of slosh velocity or amplitude, baffle spacing, and baffle locations both above and below the liquid surface. Results suggest that pressure distributions and damping values can be determined from available theories for the design of single and multiple baffle configurations.
    Keywords: FLUID MECHANICS
    Type: NASA-TN-D-6870 , L-8352
    Format: application/pdf
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  • 9
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    Study of a small magnetospheric substorm (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Data from a rocket launched into the expansion phase of an auroral substorm have been compared with data from numerous ground stations and several space vehicles. It is shown that this magnetic and auroral substorm has most of the features of larger substorms; thus it is implied that the same plasma processes are involved in all substorms. Some evidence is presented to link the auroral breakup with the field lines conjugate to the inner edge of the plasma sheet. The implications of these two results for substorm morphology and the triggering mechanism of the substorm instability are discussed. It is concluded that spatial gradients in plasma temperature are a likely cause.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 79; Apr. 1
    Format: text
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  • 10
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    Tracking air-dropped drogues and dyes from aircraft in support of ERTS-1 circulation studies (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. For two years ERTS-1 has been employed to investigate current circulation patterns in Delaware Bay under different tidal, flow, and wind conditions. Since sufficient numbers of current meters and boats are not available, air-droppable drogues and dye packs have been developed and tested. The drogues consist of a styrofoam float and a line to which is attached a stainless steel biplane. The length of the line determines at what depth currents will be monitored. The floats are color coded to distinguish their movement and mark the depth of the biplanes. Simultaneously floating and anchored dye packs of fluorescein dye have been deployed from aircraft. The movement of the dye and drogues is tracked by sequential aerial photography, using fixed markers on shore or on buoys as reference points to calibrate the scale and direction of drogue movement. The current data obtained by this technique is then used to annotate current circulation maps derived from ERTS-1 imagery.
    Keywords: GEOPHYSICS
    Type: E74-10747 , NASA-CR-139987
    Format: application/pdf
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