A novel plasma heater for auto-ignition studies of turbulent non-premixed flows
A novel plasma heater for auto-ignition studies of turbulent non-premixed flows
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DOI：
10.1007/s00348-015-2059-7
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发表时间：
2015-09
影响因子：
2.4
通讯作者：
F. Eitel;J. Pareja;D. Geyer;A. Johchi;Florian Michel;Wolfgang Elsäßer;A. Dreizler
中科院分区：
文献类型：
--
作者：
F. Eitel;J. Pareja;D. Geyer;A. Johchi;Florian Michel;Wolfgang Elsäßer;A. Dreizler
本文报道了一种用于研究燃料射流在热湍流中传播的新型自燃(AI)试验台的研制和特性。该试验台基于微波等离子体加热，能够实现高达1300K的同流温度和高达40的速度。确定了喷管出口的重要边界条件，如温度、组分和速度场，以验证试验台的能力和局限性。利用化学发光成像技术测量了、和射流在湍流热空气同向流动中的起飞高度(LOH)。还研究了同向流动和射流的温度和雷诺数(Re)的影响。结果表明，火焰稳定机理主要是由AI而不是纯火焰传播支持的。当同向流动温度对气液平衡过程起主导作用时，射流的雷诺和温度对气液平衡的影响很小。
In this paper, the development and characterization of a novel test rig for auto-ignition (AI) studies of a fuel jet propagating into a hot turbulent co-flow is reported. The test rig, based on microwave plasma heating, is capable of achieving co-flow temperatures up to 1300 K and velocities up to 40. Important boundary conditions at nozzle exit such as temperature, species, and velocity field were determined to prove the capabilities and limitations of the test rig. Liftoff height (LOH) measurements of,, andjets, propagating into a turbulent heated air co-flow, were taken using chemiluminescence imaging. Effects of the temperature and Reynolds number (Re) of co-flow and jet were also studied. Results showed that the flame stabilization mechanism is supported substantially by AI rather than pure flame propagation. While the co-flow temperature dominates the AI process, theReand temperature of the jet just have a small impact on the LOH.