Time-resolved gas thermometry by laser-induced grating spectroscopy with a high-repetition rate laser system

被引：13
|
作者：
Forster, Felix J. [1 ]
Crua, Cyril [2 ]
Davy, Martin [3 ]
Ewart, Paul [1 ]
机构：
[1] Univ Oxford, Clarendon Lab, Dept Phys, Parks Rd, Oxford OX1 3PU, England
[2] Univ Brighton, Adv Engn Ctr, Lewes Rd, Brighton BN2 4GJ, E Sussex, England
[3] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England
来源：
EXPERIMENTS IN FLUIDS | 2017年 / 58卷 / 07期
基金：
英国工程与自然科学研究理事会;
关键词：
INDUCED THERMAL ACOUSTICS; FLOW-VELOCITY; DIODE-LASER; TEMPERATURE; ABSORPTION; JET;
D O I：
10.1007/s00348-017-2370-6
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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 532 nm of a commercially available high-repetition rate Nd:YAG laser with nitrogen dioxide as molecular seed. Measurements at rates up to 10 kHz 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 1 kHz to derive the temperature evolution of the compressed gas showing temperature changes of 50 K on a time-scale of 0.1 s with a measurement precision of 1.4%. The data showed good agreement with an analytical thermodynamic model of the compression process.
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页数：8
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