A Focusing Schlieren System for the Measurement of High-Frequency, 3D Boundary-Layer Instabilities
Abstract
Funding is requested for a high-speed focusing schlieren system capable of measuring boundarylayer instabilities with three-dimensional spatial variation. The system is comprised of several individual components, including a schlieren grid and optical system of a novel design, a high-speed camera, and support structure. The setup has several advantages over a more traditional schlieren setup, including a very small depth of field (< 1 mm), high frequency response (> 1 MHz), greatly simplified calibration, and high-resolution measurements throughout the boundary layer. The primary purpose of this equipment is the investigation of the nonlinear stages of boundary-layer transition in high-speed boundary layers. The most immediate beneficiary of this system will be a recently-awarded ONR grant aimed at the study of the interaction of firstand Mack-mode waves in a Mach 4 boundary layer. The system will enable more rapid collection of data in a manner that produces much more detailed information. It will also be useful for similar future work, as well as other topics such as shock/boundary-layer interactions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N000141812385
Entities
People
- Stuart A. Craig
Organizations
- Office of Naval Research
- United States Navy
- University of Arizona