Rotational Flow in a Curved-Wall Diffuser Designed by Using the Inverse Method of Solution of Potential Flow Theory,

Abstract

Curved wall diffusers designed by using an inverse method of solution of potential flow theory have been shown to be both short and highly efficient. These features make this type of diffuser attractive in thrust ejector applications. In ejectors, however, the flow at the diffuser inlet is nearly a uniform shear flow. This paper presents a method used in examining the flow velocity along the diffuser wall and some of the analytical results for diffusers designed with potential flow theory and receiving a rotational flow. The inlet flow vorticity and the diffuser area ratios prescribed in the inverse solution of the irrotational flow are the parameters of the study. The geometry of a sample ejector using such a diffuser and its estimated thrust augmentation ratio are also presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 14, 1981
Accession Number
ADA111785

Entities

People

  • Francois Ntone
  • Tah-teh Yang

Organizations

  • Clemson University

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Deceleration
  • Equations
  • Flow Rate
  • Flow Separation
  • Geometry
  • Layers
  • Potential Flow
  • Pressure Distribution
  • Pressure Gradients
  • Shear Flow
  • Slots
  • Suction
  • Suction Slots
  • Thrust
  • Thrust Augmentation

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design