Accession Number : AD0686720

Title :   INVESTIGATION OF LAMINAR FLOW PATTERNS AND PRESSURE GENERATION IN A VISCOSEAL GEOMETRY.

Descriptive Note : Interim rept.,

Corporate Author : TENNESSEE UNIV KNOXVILLE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s) : Vreeburg,Jan P. B.

Report Date : MAR 1969

Pagination or Media Count : 108

Abstract : The laminar flowfield in a viscoseal geometry is analyzed in three parts: (1) The flow in the clearance perpendicular to the grooves and lands; (2) the recirculating flow in the groove; and (3) the flow across the grooves and lands. The equations that govern the flow in these regions are obtained after an order-of-magnitude analysis of the Navier-Stokes equations written in a non-orthogonal helical coordinate system. The velocity profile across the grooves and lands is assumed to be parabolic. The dividing streamline (D.V.S.) between the flow over and normal to the groove is taken to be a straight line. Across the D.V.S. the velocity and shear match exactly. The stream function of the flow in the groove is computed for zero Reynolds number. The solution is a finite expansion in suitably chosen eigenfunctions whose coefficients are found by the Ritz-Galerkin method. The flowfield along the groove is coupled to the flow across and in the groove by the convective inertia terms. An approximate expression for the velocity along the groove is given as a finite sine series whose coefficients are computed with the Ritz-Galerkin method. (Author)

Descriptors :   (*LAMINAR FLOW, PRESSURE), VISCOSITY, HYDRODYNAMICS, GEOMETRY, SHAFTS(MACHINE ELEMENTS), REYNOLDS NUMBER, FLOW FIELDS, NAVIER STOKES EQUATIONS, VELOCITY, INERTIA, COMPUTER PROGRAMS, BOUNDARY VALUE PROBLEMS, NUMERICAL METHODS AND PROCEDURES, THESES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE