Accession Number : ADA178639


Title :   Numerical Study of High Speed Viscous Flows.


Descriptive Note : Master's thesis,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Jochum,Keith B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a178639.pdf


Report Date : Dec 1986


Pagination or Media Count : 80


Abstract : Thermal deformations induced by aerodynamic heating on high speed vehicles are an important concern in design. Since, aerodynamic heating may have a significant effect on the performance of the vehicle, effective techniques for predicting the heat transfer and flow properties are required. The accuracy of numerical solutions depend on the grid used. Usually accurate prediction requires clustering of grid points near the surface of the body. Using an explicit algorithm to solve such problems results in the stability requirement for very small time steps to satisfy the stability bounds. To remove the time step retriction, fully implicit methods were investigated. Results for high speed flow past a circular wedge using an implicit flux splitting scheme are shown. Viscous blunt body flows are also computed and qualitative comparisons with the existing experimental data are given. In an effort to decrease the computational costs associated with the implicit algorithms for the Navier-Stokes equations, a relaxation algorithm is developed for the Approximate Navier-Stokes equations. Results for Couette flow and supersonic flow over a flat plate are obtained using this relaxation algorithm and compared to analytical and other numerical solutions. (Theses)


Descriptors :   *AERODYNAMIC HEATING , THERMAL PROPERTIES , HEAT TRANSFER , ALGORITHMS , COMPUTATIONS , HIGH RATE , FLUX(RATE) , HIGH VELOCITY , DEFORMATION , GRIDS , NUMERICAL ANALYSIS , ACCURACY , THESES , TIME , COSTS , SURFACES , GRIDS(COORDINATES) , SOLUTIONS(GENERAL) , CLUSTERING , RELAXATION , FLOW , SPLITTING , EQUATIONS , SUPERSONIC FLOW , FLUID DYNAMICS , WEDGES , NAVIER STOKES EQUATIONS , VISCOUS FLOW , BLUNT BODIES , CIRCULAR , FLAT PLATE MODELS , COUETTE FLOW


Subject Categories : Theoretical Mathematics
      Fluid Mechanics
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE