Large Eddy Structures in Transitional and Turbulent Flames.

Abstract

A second generation experimental apparatus has been designed and constructed to provide a uniform co-flowing air stream with no physical enclosure around the flame. A new seeding system has been acquired that provides large quantities of small seeded particles in the secondary air to avoid bias in velocity measurements by LDV (Laser Doppler Velocimetry). More flame height measurements have been made which do no agree with the classical Hawthorne-Hotel data. The LDV electronics processing data acquisition and software systems have all been debugged, calibrated and made ready for measurements with sampling times of 150 KHz. Ionization and thermocouple probes have been designed and are under construction. Preliminary color schlieren photographs using rainbow schlieren have been made. Keywords include: Transition A1 jet flames; Premixed and non-premixed diffusion flames.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1984
Accession Number
ADA154520

Entities

People

  • N. Chigier

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Acquisition
  • Air Flow
  • Air Force
  • Argon Lasers
  • Chemical Reactions
  • Contracts
  • Data Acquisition
  • Diameters
  • Diffusion
  • Engineering
  • Geometry
  • Jet Flames
  • Measurement
  • Mechanical Engineering
  • Photography
  • Standards
  • Students

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.
  • Software Engineering

Technology Areas

  • Directed Energy
  • Microelectronics
  • Microelectronics - Microelectromechanical Systems