A New Pumpjet Design Theory.

Abstract

The pumpjet is a unique fluid machine which utilizes retarded wake flow and produces high propulsive efficiency such as 90%. The existing pumpjet design method is based on a simple two-dimensional graphic method which was used for pump design. As the demand for the speed of underwater vehicles increased in recent years, the existing design method became inappropriate. Effort has been made to develop a new three-dimensional pump design method by combining a blade through flow theory with blade-to-blade flow theory. Such a method requires many supporting sub-theories to be developed. The foundation work for the blade-through flow theory, i.e., streamline curvature method, three-dimensional flow mapping technique, as well as two-dimensional cascade theory has been established in this FY-85 GHR program. Future work for completing sub-theoriers and incorporating such theories into a unified design theory will follow. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA181901

Entities

People

  • O. Furuya
  • W. L. Chiang

Organizations

  • Tetra Tech

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Experimental Data
  • Flow Fields
  • Flow Rate
  • Flow Separation
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Hydrodynamics
  • Pressure Distribution
  • Three Dimensional
  • Two Dimensional

Readers

  • Aerodynamics.
  • Systems Analysis and Design