100 kHz thousand-frame burst-mode planar imaging in turbulent flames

Thumbnail Image
Date
2014-02-01
Authors
Michael, James
Venkateswaran, Prabhakar
Miller, Joseph
Slipchenko, Mikhail
Gord, James
Roy, Sukesh
Meyer, Terrence
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Mechanical Engineering
Abstract

High-repetition-rate, burst-mode lasers can achieve higher energies per pulse compared with continuously pulsed systems, but the relatively few number of laser pulses in each burst has limited the temporal dynamic range of measurements in unsteady flames. A fivefold increase in the range of timescales that can be resolved by burst-mode laser-based imaging systems is reported in this work by extending a hybrid diode- and flashlamp-pumped Nd:YAGbased amplifier system to nearly 1000 pulses at 100 kHz during a 10 ms burst. This enables an unprecedented burstmode temporal dynamic range to capture turbulent fluctuations from 0.1 to 50 kHz in flames of practical interest. High pulse intensity enables efficient conversion to the ultraviolet for planar laser-induced fluorescence imaging of nascent formaldehyde and other potential flame radicals.

Comments

This article is from Optics Letters 39 (2014): 739, doi: 10.1364/OL.39.000739. Posted with permission.

Description
Keywords
Citation
DOI
Subject Categories
Copyright
Wed Jan 01 00:00:00 UTC 2014
Collections