Accession Number : ADA189478

Title :   Supersonic, Transverse Jet from a Rotating Ogive Cylinder in a Hypersonic Flow.

Descriptive Note : Final rept. Jan-Sep 87,

Corporate Author : UNIVERSAL ENERGY SYSTEMS INC DAYTON OH

Personal Author(s) : McMaster, Daniel L

PDF Url : ADA189478

Report Date : Nov 1987

Pagination or Media Count : 50

Abstract : Numerical simulations were performed for a supersonic jet issuing from a blunt-nosed ogive cylinder into a Mach 12 cross stream. All calculations employed the finite differenced, mass-averaged Navier Stokes equations with an algebraic eddy viscosity model for turbulence closure. One portion of the present investigation was focused on the numerical resolution requirement for the three-dimensional separated flow field around the non-rotating body. For this purpose, four solutions were obtained using mesh systems with different numbers of grid points and clustering. The secondary separated flow field structure was resolved with moderately increased grid density. The major portion of the present study was devoted to the simulation of the flow field around the identical configuration with the added complexity of rotating motion about the principal axis of the body. Numerical solutions over a wide range of angular velocities were obtained in the rotating frame of reference. The effects of rotation on the global flow field structure and especially the jet plume formation were examined through a comparative study from the viewpoint of a stationary observer. At the low angular velocity of interest, the effects of body rotation on the flow field structure were significant.

Descriptors :   *EXHAUST PLUMES, *HYPERSONIC FLOW, *JET FLOW, *CROSS FLOW, ANGULAR MOTION, BLUNT BODIES, CLOSURES, CYLINDRICAL BODIES, DENSITY, EDDIES(FLUID MECHANICS), FLOW FIELDS, FLOW SEPARATION, GLOBAL, GRIDS, GRIDS(COORDINATES), LOW ANGLES, LOW VELOCITY, MATHEMATICAL MODELS, MESH, MOTION, NOSES, NUMBERS, NUMERICAL ANALYSIS, OBSERVERS, OGIVES, RANGE(EXTREMES), REQUIREMENTS, RESOLUTION, ROTATION, SIMULATION, SOLUTIONS(GENERAL), STATIONARY, THREE DIMENSIONAL FLOW, TRANSVERSE, TURBULENCE, VELOCITY, VISCOSITY, MACH NUMBER

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE