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The Design of Pumpjets for Hydrodynamic PropulsionA procedure for use in the design of a wake adapted pumpjet mounted on the aft end of a body of revolution is presented. To this end, a pumpjet is designed for the Akron airship. The propulsor mass flow is selected to minimize kinetic energy losses through the duct and in the discharge jet. The shaft speed and disk size are selected to satisfy specified limits of cavitation performance and to provide acceptable blade loading. The streamtubes which pass through a propulsor mounted on a tapered afterbody follow essentially conical surfaces. A method is provided for defining these surfaces as a function of shroud geometry, rotor head distribution, and the energy distribution of the ingested mass flow. The three-dimensional effects to which the conical flow subjects the cylindrical blade design sections are described and a technique is presented which permits incorporation of these effects in the blade design procedure.
Document ID
19750003135
Document Type
Conference Paper
Authors
Bruce, E. P. (Pennsylvania State Univ. University Park, PA, United States)
Gearhart, W. S. (Pennsylvania State Univ. University Park, PA, United States)
Ross, J. R. (Pennsylvania State Univ. University Park, PA, United States)
Treaster, A. L. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Publication Information
Publication: Fluid Mech., Acoustics, and Design of Turbomachinery, Pt. 2
Subject Category
MECHANICAL ENGINEERING
Funding Number(s)
CONTRACT_GRANT: N00017-70-C-1407
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19750003119Analytic PrimaryFluid mechanics, acoustics, and design of turbomachinery, part 2