Abstract
Thermometry using laser-induced grating spectroscopy (LIGS) is reported using a high-repetition rate laser system, extending the technique to allow time-resolved measurements of gas dynamics. LIGS signals were generated using the second harmonic output at 532nm of a commercially available high-repetition rate Nd:YAG laser with nitrogen dioxide as molecular seed. Measurements at rates up to 10kHz were demonstrated under static cell conditions. Transient temperature changes of the same gas contained in a cell subjected to rapid compression by injection of gas were recorded at 1kHz to derive the temperature evolution of the compressed gas showing temperature changes of 50K on a time-scale of 0.1s with a measurement precision of 1.4%. The data showed good agreement with an analytical thermodynamic model of the compression process.
| Original language | English |
|---|---|
| Journal | Experiments in Fluids |
| Volume | 58 |
| Issue number | 87 |
| DOIs | |
| Publication status | Published - 7 Jun 2017 |
Bibliographical note
© The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.Fingerprint
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Cyril Crua
- School of Arch, Tech and Eng - Professor of Thermofluids
- Advanced Engineering Centre
- Centre for Regenerative Medicine and Devices
Person: Academic