Performance of Seven Semicircular Lift-Producing Nozzles

Abstract

An investigation of the thrust coefficient and lift force produced by seven semicircular lift-producing nozzles was conducted with air at ratios of total pressure to ambient pressure up to 1000. The nozzle-exit Mach numbers ranged from 2.22 to 4.54. The models were originally circular cross-section nozzles designed by the method of characteristics for uniform axial flow at the exit. These circular nozzles were split and a flat plate substituted for the lower half. The models were further modified to produce lift by cutting notches in the trailing edge of the flat plate. Test results of each configuration are given. Notching the flat plate did not significantly affect the thrust coefficient. A lift-thrust ratio of 0.21 was the maximum value recorded.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1965
Accession Number
ADA397598

Entities

People

  • Charles J. Shoemaker

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Supplies
  • Axial Flow
  • Boundary Layer
  • Exhaust Plumes
  • Flow
  • Internal Pressure
  • Layers
  • Mach Number
  • Measurement
  • Method Of Characteristics
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Static Pressure
  • Strain Gages
  • Trailing Edges

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Combustion and Flow Dynamics.
  • Metallurgy