Treatment of systematic errors in intrusive concentration and temperature measurements
- 40 Downloads
Typical systematic errors that are made during intrusive concentration and temperature measurements in combustion chambers are illustrated. To decrease the errors, it is necessary to ensure rapid quenching of combustion gases and freezing of the composition of combustion products. Analysis is performed using a simple analytic model for heat transfer in a sampling probe. Results are given in the form of temperature-time dependences, temperature profiles, and quench rates inside the probe. The measurement results are validated on the basis of formulation of a material balance (conservation of number of atoms). The main errors of high-temperature thermocouple measurements are discussed in detail, with emphasis on the radiation correction.
KeywordsRadiation Correction Equivalence Ratio Quench Rate Rapid Quenching Pein
Unable to display preview. Download preview PDF.
- 1.J. L. Beal and J. T. Grey, “Sampling and analysis of combustion gases,”J. Am. Rocket Soc., May–June, 174–177 (1953).Google Scholar
- 2.W. M. Kays, “Numerical solutions for laminar-flow heat transfer in circular tubes,”Trans. ASME,77, 1265 (1955).Google Scholar
- 3.P. R. Ammann and R. S. Timmins, “Chemical reactions during rapid quenching of oxygen-nitrogen mixtures from very high temperatures,”Am. Inst. Chem. Eng. J.,12, 956 (1966).Google Scholar
- 7.R. A. Yetter and F. L. Dryer, “Inhibition of moist carbon monoxide oxidation by trace amounts of hydrocarbons,” in: 24th Int. Symp. on Combustion, The Combustion Institute, Pittsburgh (1992), pp. 757–767.Google Scholar
- 8.W. E. Kaskan, “The dependence of flame temperature on mass burning velocity,” in:6th Int. Symp. on Combustion, Reinhold, New York (1957), p. 134.Google Scholar
- 10.R. Pein, “Berechnungsgrundlagen und Messungen zur Stabilisierung turbulenter Flammen durch Flammenhalter,” Diplomarbeit TU Darmstadt (1969).Google Scholar
- 11.U. Bonne, T. Grewer, and H. G. Wagner, “Messungen in der Reaktionszone von Wasserstoff-Suerstoff- und Methan-Sauerstoff-Flammen,”Z. Phys. Chem., Neue Folge,26, Nos. 1/2, 93–110 (1960).Google Scholar