High Momentum Jet Flames at Elevated Pressure: Detailed Investigation of Flame Stabilization With Simultaneous Particle Image Velocimetry and OH-LIF
| العنوان: | High Momentum Jet Flames at Elevated Pressure: Detailed Investigation of Flame Stabilization With Simultaneous Particle Image Velocimetry and OH-LIF |
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| المؤلفون: | Oliver Lammel, Rainer Lückerath, Manfred Aigner, Michael Severin, Holger Ax, Johannes Heinze, Wolfgang Meier |
| المصدر: | Journal of Engineering for Gas Turbines and Power. 140 |
| بيانات النشر: | ASME International, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Physics, Jet (fluid), Mechanical Engineering, Nozzle, Energy Engineering and Power Technology, Aerospace Engineering, 02 engineering and technology, Mechanics, Particulates, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, High momentum, 010305 fluids & plasmas, law.invention, Momentum, Fuel Technology, Nuclear Energy and Engineering, Particle image velocimetry, law, 0103 physical sciences, Combustion chamber, Atomic physics, 0210 nano-technology |
| الوصف: | A model FLOX® combustor, featuring a single high momentum premixed jet flame, has been investigated using laser diagnostics in an optically accessible combustion chamber at a pressure of 8 bar. The model combustor was designed as a large single eccentric nozzle main burner (Ø 40 mm) together with an adjoining pilot burner and was operated with natural gas. To gain insight into the flame stabilization mechanisms with and without piloting, simultaneous particle image velocimetry (PIV) and OH laser-induced fluorescence (LIF) measurements have been performed at numerous two-dimensional (2D) sections of the flame. Additional OH-LIF measurements without PIV particles were analyzed quantitatively resulting in absolute OH concentrations and temperature fields. The flow field looks rather similar for both the unpiloted and the piloted cases, featuring a large recirculation zone next to the high momentum jet. However, flame shape and position change drastically. For the unpiloted case, the flame is lifted and widely distributed. Isolated flame kernels are found at the flame root in the vicinity of small-scale vortices. For the piloted flame, on the other hand, both pilot and main flame are attached to the burner base plate, and flame stabilization seems to take place on much smaller spatial scales with a connected flame front and no isolated flame kernels. The single-shot analysis gives rise to the assumption that for the unpiloted case, small-scale vortices act like the pilot burner flow in the opposed case and constantly impinge and ignite the high momentum jet at its root. |
| تدمد: | 1528-8919 0742-4795 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::898539c99d59dfc0db9262fee80ad46d https://doi.org/10.1115/1.4038126 |
| رقم الأكسشن: | edsair.doi...........898539c99d59dfc0db9262fee80ad46d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15288919 07424795 |
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