Measuring the Surface Temperature of a Molecular Beam Probe in the Flame Front at Pressures of 1–5 atm
A. M. Dmitriev1,2, M. V. Agafontsev3, E. L. Loboda3, D. A. Knyaz'kov1,2, O. P. Korobeinichev1
1Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
3Tomsk State University, Tomsk, 634050 Russia
Keywords: зондовые возмущения, термография, микротермопары, ламинарное пламя, повышенное давление, probe perturbations, thermography, microthermocouples, laminar flame, high blood pressure
Abstract
The method of probe sampling of gas samples is actively used to study high-temperature oxidation processes. This method directly provides information on the chemical composition of the reaction volume; however, the probe inevitably introduces thermal and gas-dynamic perturbations into the system. Surface temperature profiles of a quartz probe in a premixed CH4/O2/Ar flame were measured in the pressure range 1–5 atm. Measurements were made by a non-contact method using a thermal imager, which was calibrated by thermocouple measurements taking into account the shielding by the flame. The obtained data can be used as boundary conditions for numerical simulation of the sampling process, which will significantly increase the accuracy of error estimation when using probe methods.
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