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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Печать: 2150-766X
ISSN Онлайн: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.870
pages 934-942

CARS MEASUREMENTS OF TEMPERATURE FLUCTUATIONS IN A HIGH PRESSURE GAS TURBINE COMBUSTOR

B. Hemmerling
Paul Scherrer Institute, Laboratory of Energy and Process Technology CH-5232 Villigen PSI, Switzerland
R. Bombach
Paul Scherrer Institute, Combustion Research, CH-5232 Villigen-PSI, Switzerland
W. Kreutner
Paul Scherrer Institute, Laboratory of Energy and Process Technology CH-5232 Villigen PSI, Switzerland

Краткое описание

A mobile CARS system has been used to determine temperatures and their fluctuations in a high-pressure combustion test rig with a maximum thermal power of 8 MW. Probability density functions of the temperature, each based on 1000 single-shot measurements, have been determined at different radial and axial locations within the combustion chamber in turbulent natural gas and oil flames up to a pressure of 14 bar. Analysis of the frequency spectrum of the temperature probability density functions reveals periodic fluctuations of the flame.
A high degree of turbulence, an increased pressure together with an extended size of the combustion chamber caused beam propagation effects to become a serious problem for this measuring technique. Temperature determinations in sooty oil flames became even more difficult due to the strong absorption of a part of the fundamental band of the N2 CARS spectrum by C2 radicals.


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