NUMERICAL SIMULATION OF SPATIAL FLOW OVER A CYLINDER WITH A DISC NOZZLE AT THE FRONT END

O.M. Veliсhкo, A.N. Razin
VANT. Ser. Mat. Mod. Fiz. Proc 1991. Вып.3. С. 3-6.

      Spatial flow over a cylinder with a disc nozzle at the front end is considered for μ_∞= 3 and attack angle α = 5^º. The simulation is carried out within an inviscid nonconducting gas model. Three-dimensional time- dependent Euler equations are integrated with Godunov difference method. A time-independent flow-pattem is obtained by stabilizing over time within the time-dependent process. A complex flow structure occurring between the body and head shock surfaces is illustrated graphically. Aerodynamic configuration characteristics are derived from pressure distribution obtained. It should be noted that for a spatial flow over the configuration the longitudinal force coefficient is twice the wave impedance coefficient for axisymmetric flow. The problem is numerically solved with a multiprocessor-oriented program written in FORTRAN-77. Gas dynamic parameters are calculated in parallel mode which allows to substantially reduce the computation time.