Estimates for Hydraulic Efficiency and Blade Characteristics for Preliminary Pumpjet Design Exercise.

Abstract

A method is given for predicting hydraulic efficiency of a pumpjet as a function of ingested mass flow. This method is presented for a conventional pumpjet which has a stator aft of the rotor and a preswirl pumpjet which has a stator forward of the rotor. The approach uses mass averaged values of flow quantities to detemrine blade geometries and operating characteristics at a blade radius that is representative of the average energy input of the blade row. The space-to-chord ratio, lift coefficients, stage efficiency, and overall efficiency of the pumpjet is computed for a given vehicle as a function of advance ratio. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 03, 1979
Accession Number
ADA073594

Entities

People

  • J. E. Fredley
  • W. S. Gearhart

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Axial Flow
  • Axial Flow Compressors
  • Blade Tips
  • Blades
  • Cavitation
  • Coefficients
  • Drag
  • Efficiency
  • Engineering
  • Equations
  • Flow
  • Geometry
  • Mass Flow
  • Navy
  • Plastic Explosives
  • Static Pressure
  • Universities

Fields of Study

  • Physics

Readers

  • Aerodynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster