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  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Heat and mass transfer 26 (1991), S. 1-5 
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Es wurde ein inverses Finite-Elemente-Computer-Programm entwickelt, um den Oberflächenwärmestrom und die Oberflächentemperatur aus dem mit Thermoelementen gemessenen Temperaturverlauf zu bestimmen. Die Bestimmung des konvektiven Wärmeübertragungskoeffizienten und der Verbrennungsgastemperatur ist mit Verwendung von Aufzeichnungen der transienten Ansprechtemperatur ausgeführt worden. Für die thermische Auslegung von Raketendüsen werden einige Beispiele dargestellt. Die Ergebnisse beweisen, daß dieses Verfahren bemerkenswerte Fähigkeiten besitzt, um unbekannte Randbedingungen annähernd zu berechnen.
    Notes: Abstract An inverse finite element computer code is developed to predict surface heat flux and surface temperature in conjunction with the measured thermocouple temperature history. Determination of convective heat-transfer coefficient and combustion gas temperature is carried out employing transient temperature response chart. Examples are illustrated which are typical of those that arise in thermal design of rocket nozzle. The results demonstrate that the method is remarkable in its ability to estimate unknown boundary conditions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 13 (1991), S. 481-489 
    ISSN: 0271-2091
    Keywords: Shock/turbulent problem ; Runge-Kutta time scheme ; FEM ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A finite element algorithm for solving the Navier-Stokes equations is presented for the analysis of high-speed viscous flows. The algorithm uses triangular elements. The unsteady equations are integrated to steady state with a Runge-Kutta time-marching scheme. A postprocessing artificial dissipation term is introduced to stabilize the computations and to dampen dissipation errors. Numerical results are compared with the calculation of uniform flow on a rectangular region which encounters an embedded oblique shock. A shock/turbulent boundary layer problem is also solved and results are compared with experimental data. It is shown that the postprocessing smoothing term and boundary conditions similar to the finite difference method work well in the present numerical studies.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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