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High-speed mixture fraction imaging

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Abstract

Advances in high-speed laser and camera technology have made scientific kHz repetition rate combustion and flow laser diagnostics feasible. While quantitative flow-field results have been shown to be possible via PIV, measuring scalars relevant to combustion such as mixture fraction, temperature and species concentrations is still a significant challenge. Tracer-LIF has proven to be a useful tool for imaging of mixture fraction. This paper highlights recent success at extending this technique for use at 9.5 kHz acquisition rate. The measurements are taken near the exit of an isothermal round jet seeded with acetone. Results taken at both maximum possible signal and a practical configuration for reacting flows are contrasted. Data are fully quantified and corrected for not only absorption, optical uniformity and laser pulse variation, but also for individual CMOS pixel offset and sensitivity.

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Authors and Affiliations

  1. Center of Smart Interfaces, Institute of Reactive Flows and Diagnostics, Petersenstraße 32, 64287, Darmstadt, Germany

    R. L. Gordon, C. Heeger & A. Dreizler

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  1. R. L. Gordon
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  2. C. Heeger
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  3. A. Dreizler
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Correspondence to R. L. Gordon.

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Gordon, R.L., Heeger, C. & Dreizler, A. High-speed mixture fraction imaging. Appl. Phys. B 96, 745–748 (2009). https://doi.org/10.1007/s00340-009-3637-2

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  • DOI: https://doi.org/10.1007/s00340-009-3637-2

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