Simultaneous MHz Rate Flow Visualization and Wavefront Sensing for Aero-Optics
Abstract
Newly developed optical diagnostic techniques are used to examine the temporal evolution of wavefront aberrations imposed upon an optical beam as it passes through a rectangular compressible turbulent jet. A recently developed MHz rate system based on a pulse burst laser and ultra highspeed CCD camera is used for flow visualization. A newly developed two-dimensional MHz rate Shack-Hartman wavefront sensor is used to measure the wavefront distortion. The wavefront sensor consists of a HeNe laser, a micro-lens array and an ultra high-speed camera. The MHz rate flow visualization and wavefront sensing are used simultaneously to investigate the aero-optic effects of an ideally expanded, high Reynolds number, Mach 1.3 rectangular jet. Preliminary results are presented that show the potential of the technique to acquire time-resolved two-dimensional wavefront data with detailed aero-optic effects. A number of improvements to the technique that will be used in future work are also discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2003
- Accession Number
- ADA602019
Entities
People
- Bradley Duncan
- Brian S Thurow
- Jeff Widiker
- Mohammad Samimy
- Scott R. Harris
- Walter Lempert
Organizations
- Ohio State University