SMALL-TIME BEHAVIOR OF UNSTEADY CAVITY FLOWS

Abstract

A perturbation theory is applied to investigate the small-time behavior of unsteady cavity flows in which the time-dependent part of the flow may be taken as a small-time expansion superimposed on an established steady cavity flow of an ideal fluid. One purpose of this paper is to study the effect of the intial cavity size on the resulting flow due to a given disturbance. Various existing steady cavity-flow models have been employed for this purpose to evaluate the initial reaction of a cavitated body in an unsteady motion. Furthermore, a physical model is proposed here to give a proper representation of the mechanism by which the cavity volume may be changed with time; the initial hydrdynamic force resulting from such change is calculated based on this model.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0403778

Entities

People

  • D. P. Wang
  • T. Yaotsu

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Analytic Functions
  • Birds
  • Complex Variables
  • Computational Science
  • Conformal Mapping
  • Fluid Dynamics
  • Fluid Mechanics
  • Hydrodynamics
  • Marine Engineering
  • Naval Architecture
  • Navy
  • New York
  • Physics Laboratories
  • Ship Model Basins
  • Steady Flow
  • Unsteady Flow

Fields of Study

  • Mathematics
  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture