An Investigation of Cowl Inlets for the B-29 Power-Plan Installation

Abstract

Investigation of five cowl-inlet configurations was made in altitude wind tunnel to determine effect of propeller spinners and increased inlet diameters on cooling air pressures at cowl inlet and at face of engine and on drag and critical speed of cowl. Cooling-air pressures at cowl inlet were greater for a 43-inch diameter inlet further increases pressure at face of engine, whereas addition of 32-inch diameter spinner to same inlet did not effect pressure. Cooling drag installation with 43-inch diameter was considerably less than with a 38-1/2 by 35-inch oval inlet.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1946
Accession Number
ADA800570

Entities

People

  • Louis L. Monroe
  • Martin J. Saari

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Air Flow
  • Air Pressure
  • Aircrafts
  • Altitude
  • Boundary Layer
  • Diameters
  • Flow
  • Free Stream
  • Geometry
  • Leading Edges
  • Mach Number
  • Pressure Distribution
  • Pressure Gradients
  • Propellers
  • Static Pressure
  • Wind Tunnels

Readers

  • Aerodynamics.
  • Combustion and Flow Dynamics.