Assessment of Threshold Visibility - T56 Turboprop Engines

Abstract

This report summarizes the results of flight and ground tests performed to determine the threshold visibility of the exhaust plume from a C130H aircraft as a function of Smoke Number. The report first addresses the deficiencies of the present Smoke Number standard and the consequent necessity to correlate visibility with Smoke Number experimentally. Measurements of opacity (both by visual observation and by photometric techniques) and of smoke number are presented followed by analyses of the data. A Smoke Number of 48 was determined to be a conservative estimate of the threshold for exhaust plume visibility. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1981
Accession Number
ADA127780

Entities

People

  • J. M. Vaught
  • John E. Stevens
  • John T. Slankas
  • L. A. Mattison

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Pollution
  • Aircrafts
  • Cameras
  • Data Analysis
  • Ecology
  • Exhaust Gases
  • Exhaust Plumes
  • Gas Turbines
  • Jet Engines
  • Measurement
  • Optical Properties
  • Optics
  • Refractive Index
  • Turbines
  • Turbojet Engines
  • Turboprop Engines

Readers

  • Aerosol Science/Aerosol Physics
  • Internal Combustion Engine (ICE) Technology.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.