Extension of Transonic Flow Computational Concepts in the Analysis of Cavitated Bearings

Abstract

In this paper, an analogy between the mathematical modeling of transonic potential flow and the flow in a cavitating bearing is described. Based on the similarities, characteristics of the cavitated region and jump conditions across the film reformation and rupture fronts are developed using the method of weak solutions. The mathematical analogy is extended by utilizing a few computational concepts of transonic flow to numerically model the cavitating bearing. Methods of shock fitting and shock capturing are discussed. Various procedures used in transonic flow computations are adapted to bearing cavitation applications, for example, type differencing, grid transformation, an approximate factorization technique, and Newton's iteration method. These concepts have proved to be successful and have vastly improved the efficiency of numerical modeling of cavitated bearings.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1990
Accession Number
ADA231726

Entities

People

  • D. E. Brewe
  • D. Vijayaraghavan
  • T. G. Keith Jr.

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Army Aviation
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Fluid Mechanics
  • Hugoniot Equations
  • Mechanical Engineering
  • Mechanical Properties
  • Partial Differential Equations
  • Potential Flow
  • Pressure Distribution
  • Pressure Gradients
  • Shock Waves
  • Supersonic Flow

Readers

  • Computational Fluid Dynamics (CFD)
  • Marine Propulsion Engineering and Naval Architecture
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).