A MHz rate imaging system for study of turbulent and time evolving high speed flows

Author

Thurow, B. ; Hileman, J. ; Samimy, M. ; Lempert, W.

Author_Institution

Dept. of Mech. Eng., Ohio State Univ., Columbus, OH, USA

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

37

Lastpage

47

Abstract

We present a second generation MHz frame rate imaging system, based on a custom fabricated "pulse-burst" laser and a commercial CCD framing camera. The utility of the system for high-speed flow visualization is demonstrated in a Mach 1.3 axisymmetric jet. Complete 17 frame image sequences are used to explore the evolution and interaction of large scale structures and to determine their convective velocity, employing a novel spatial correlation technique, which includes a "translating template" that convects downstream with the structure being tracked. Preliminary progress towards the development of a MHz rate Planar Doppler Velocimetry diagnostic is also included

Keywords

CCD image sensors; Doppler measurement; correlation methods; flow visualisation; image sequences; jets; laser velocimetry; real-time systems; turbulence; CCD framing camera; Mach 1.3 axisymmetric jet; convective velocity; high-speed flow visualization; large scale structures; planar Doppler velocimetry; pulseburst" laser; second generation MHz frame rate imaging; spatial correlation; translating template; Charge coupled devices; Charge-coupled image sensors; Gas lasers; Optical pulse generation; Optical pulses; Pulse amplifiers; Pulse measurements; Ring lasers; Solid lasers; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation in Aerospace Simulation Facilities, 2001. 19th International Congress on ICIASF 2001

Conference_Location

Cleveland, OH

Print_ISBN

0-7803-7022-8

Type

conf

DOI

10.1109/ICIASF.2001.960234

Filename

960234