Pressure measurement in combusting and non-combusting gases using laser-induced grating spectroscopy
Pressure measurement in combusting and non-combusting gases using laser-induced grating spectroscopy
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使用激光诱导光栅光谱测量燃烧和非燃烧气体的压力
DOI:
10.1007/s00340-019-7159-2
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Sahlberg A
中科院分区:
文献类型:
--
作者:
Sahlberg A
The measurement of pressure using laser-induced thermal grating spectroscopy, LITGS, with improved accuracy and precision is reported. Pressure values are derived from the record of the time-profile of LITGS signals by fitting of modelled signals to experimental data. The procedure is described for accurate modelling of the LIGS signals involving a sequence of calculation steps with appropriate weighting and calibration to determine the best-fit value of pressure-dependent parameters for averaged and single-shot measurements. Results are reported showing application of this model-fitting method to measurements of pressure in static cells using LITGS generated from NO in mixtures containing N2at pressures in the range 0.5–5.0 bar with accuracy of 1–3% and single-shot precision of 4–7%. Time-resolved measurements of pressure, using LITGS signals generated in toluene-seeded fuel vapour, during the compression and expansion strokes of a motored optically accessible engine are reported with pressure-dependent accuracy ranging from better than 10 to around 20% over the cycle and single-shot precision in the range 5–15% over the same range. Measurements in the engine under firing conditions were obtained over a limited range and slightly increased uncertainties associated with varying composition resulting from exhaust gas residuals. The method was found to be of limited utility for measurements in high temperature flames at around ambient pressures.
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DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
W. Hubschmid;B. Hemmerling
通讯作者:
B. Hemmerling
影响因子:
3.6
作者:
S. Kearney;P. Danehy
通讯作者:
P. Danehy
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1.9
作者:
M. A. Woodmansee;R. Lucht;J. Dutton
通讯作者:
J. Dutton
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
C. Willman;P. Ewart
通讯作者:
P. Ewart
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
B. Hemmerling;D. Kozlov
通讯作者:
D. Kozlov