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  • Aircraft Design, Testing and Performance  (1)
  • Fluid Mechanics and Thermodynamics  (1)
  • 1
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    DSMC Simulation of Shock/Shock Interactions: Emphasis on Type IV Interactions (1999)
    In:  CASI
    Details
    Publication Date: 2018-06-05
    Description: This paper presents the results of a numerical study of shock/shock interactions that include both the Edney type IV and type III interactions, with emphasis on the type IV interactions. Computations are made using the direct simulation Monte Carlo (DSMC) method of Bird for Mach 10 air flow, as produced in the ONERA R5Ch low-density wind tunnel. The simulations include the flow about a shock generator which creates a relatively weak oblique shock that impinges on a much stronger cylinder bow shock. The sensitivity and characteristics of the interactions are examined by varying the horizontal distance separating the shock generator leading edge and cylinder. Results of the simulation for one separation distance are compared with wind tunnel measurements. Comparisons are made for surface heating and pressure and for flow-field values of density and rotational temperatures, as obtained with the Dual-line Coherent Anti-Stokes Scattering (DL-CARS) technique. The comparisons between experiment and calculation yield a consistent description of the shock interaction features and a consistent description of the surface heating and pressure distributions, with the exception of the peak values-the computed values being greater than the measured values.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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  • 2
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    Rarefied Transitional Bridging of Blunt Body Aerodynamics (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The bridging procedures discussed provide an accurate engineering method for predicting rarefied transitional aerodynamics of spherically-blunted cone entry vehicles. The single-point procedure offers a way to improve the bridging procedures while minimizing the computational effort. However, the accuracy of these procedures ultimately depends on accurate knowledge of the aerodynamics in the free-molecular and continuum limits. The excellent agreement shown for DSMC predictions and bridging relations with the Viking flight data in transitional regime enhance the coincidence in these procedures.
    Keywords: Aircraft Design, Testing and Performance
    Type: 21st International Symposium on Rarefied Gas Dynamics; Jul 26, 1998 - Jul 31, 1998; Marseille; France
    Format: application/pdf
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