NEAR FIELD INFRARED BACKGROUND NOISE SIMULATION

Abstract

Studies on the near field infrared background noise problem were directed toward the simulation of the infrared noise emanating from a known turbulent zone. A laboratory tool for simulating the near field noise has been designed, utilizing a simple heated round free subsonic jet as the infrared noise generator. A review of the characteristics of the hot free subsonic jet is presented and the design of the near field infrared background simulator is described. Preliminary measurements of the fluctuations in radiant emittance from the jet have been made with an AC radiometer. The data were reduced to normalized spectral density curves. The spectral density curves exhibit a more rapid decrease in energy level with increasing frequency than do spectral density curves obtained from hot wire measurements.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1965
Accession Number
AD0462729

Entities

People

  • Richard H. Adams

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Background Noise
  • Bandwidth
  • Boundary Layer
  • Detectors
  • Frequency
  • Infrared Detectors
  • Instrumentation
  • Mass Flow
  • Measurement
  • Partial Pressure
  • Ship Model Basins
  • Simulations
  • Simulators
  • Turbulent Boundary Layer
  • Turbulent Mixing
  • United States

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Plasma Physics / Magnetohydrodynamics
  • Spectroscopy.