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Gas temperature measurements using wavelength modulation spectroscopy at 1.39 žm

100%

Cai T. , Tan T. , Wang G. , Chen W. , Gao X.

2009

tom Vol. 39, nr 1

13--29

Gas temperature measurements in a combustion system by using wavelength modulation spectroscopy 2f ratio of two selected transitions method were presented for 1.39 žm. Wavelength modulation was performed at 35 kHz, and was superimposed on 500 Hz wavelength scans in order to recover full second-harmonic line shapes. H2O line-pair at 7164.901 cm-1 and 7165.215 cm-1 was selected for this measurement. The criteria of the line-pair selection were discussed. The sensitivity and accuracy of the sensor were demonstrated in a static cell in laboratory (over the temperature range of 400-1000 K, average bias ?T ~ 5 K). Burner experiments demonstrate the ability of our system forin situ measurements. The influence caused by variation of total pressure and species concentration in burning gas during combustion was also discussed.

Laboratory stand for investigations of the quick-changing temperature of gas flowing in the piston compressor outlet channel

63%

Puzdrowska P.

tom Vol. 9, no 1

111-120

This paper presents a laboratory stand, created as a part of work on the doctor dissertation, intended for investigation of heat and flow processes taking place in the Espholin H3S piston compressor outlet channel. The test stand elements and their configuration within the stand are described. Discussed are also problems connected with the quick - changing measurement technique, solutions which have been proposed so far in that technology and premises are determined of choosing most suitable methods for measuring quick - changing temperature of outlet gases in piston machines as a diagnostic parameter.