Doppler global velocimetry for the analysis of combustor flows |
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| Institution: | 1. Institute of Propulsion Technology, DLR – German Aerospace Center, Linder Höhe, D-51147, Köln, Germany;2. Rolls-Royce Deutschland Ltd. & Co KG, Eschenweg 11, D-15827 Dahlewitz/Berlin, Germany;1. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha, 410073, China;2. Division of Fluid Mechanics, Lund University, P. O. Box 118, S-221 00 Lund, Sweden;1. University of Duisburg-Essen, Chair of Thermal Process Engineering, Lotharstraße 1, D-47057 Duisburg, Germany;2. Institute of Energy and Environmental Technology e.V. (IUTA), Bliersheimer Str. 60, D-47229 Duisburg, Germany;1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China;2. Center for Composite Materials and Structures, School of Astronautics, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China;1. State Grid Taiyuan Power Suppy Company, Taiyuan, 030012, China;2. Wuhan KPCQ Software Technology Co. Ltd., Wuhan, 430074, China;1. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, PR China;2. College of Mechanical and Automotive Engineering, Qilu Universtiy of Technology(Shandong Academy of Sciences), Jinan 250353, PR China |
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| Abstract: | The principle of Doppler global velocimetry (DGV) and a DGV system optimized for time averaged three-component velocity measurements is described in this paper. Furthermore, the design of the different components of the DGV-system as well as the manner of its operation is presented.The volumetric, time averaged, three-component velocity distribution was acquired in the isothermal flow of a low NOx, staged combustion chamber sector from Rolls-Royce Deutschland. The combustor was developed within the German public-funded Engine 3E program. On the basis of the collected data, the complex flow phenomena in the combustor could be analyzed in detail and supported by CFD calculations.A recently developed, pulsed Nd:YAG laser now enables planar, time-averaged, three-component DGV application in combusting flow fields. Measurements were carried out in a single-nozzle, kerosene combustion chamber model, operated under atmospheric pressure. The successful measurements demonstrated the capability of DGV as a new tool for combustion research. It was possible to separately measure the gas velocity and the velocity of the fuel droplets, a promising capability of DGV for two phase flow analysis. |
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