Development and Application of Advanced Optical Diagnostics for the Study of High Speed Flows in Micro Systems

Abstract

A program has been initiated to develop and demonstrate the applicability of time-of-flight and Doppler-based optical velocimetry techniques to supersonic micro scale flow fields. In particular, Molecular Tagging Velocimetry (MTV) measurements have been performed, using acetone vapor as a molecular tracer, in the flow produced by a 1 mm diameter, pressure matched, sonic nozzle. Measurements were performed over a static pressure range from approximately equal 1 torr to approximately equal 20 torr. Measurement accuracy is found to be on the order of 5 m/sec at a spatial resolution of order 10 microns. As a compliment to the experimental measurements, a computational program was also initiated which focused on the development of in house Navier - Stokes and Direct Simulation Monte Carlo (DSMC) codes.

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Document Details

Document Type
Technical Report
Publication Date
Dec 21, 2000
Accession Number
ADA385775

Entities

People

  • Mohammad Samimy
  • Vish Subramaniam
  • Walter R. Lempert

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Chemistry
  • Computational Fluid Dynamics
  • Engineering
  • Fabrication
  • Flow
  • Fluid Dynamics
  • Free Stream
  • Gas Flow
  • Knudsen Number
  • Mach Number
  • Measurement
  • Mechanical Engineering
  • Stagnation Pressure
  • Supersonic Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flight
  • Hypersonics - Hypersonic Flow