Early flame propagation in a spark-ignition engine measured with quasi 4D-diagnostics
Early flame propagation in a spark-ignition engine measured with quasi 4D-diagnostics
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使用准 4D 诊断测量火花点火发动机的早期火焰传播
DOI：
10.1016/j.proci.2014.05.131
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Dreizler
中科院分区：
文献类型：
--
作者：
Peterson;Dreizler
本文介绍了第一个结果，对实验解决当地的三维（3D）火焰传播和燃烧化学相互作用的火花点火发动机使用时间分辨多平面激光诊断。该实验方法利用同步双平面激光诱导荧光（LIF）的OH和立体PIV（SPIV），以局部解决3D火焰位移速度在火焰发展的早期时，小于5%的质量已被消耗。OH-LIF用于跟踪反应区的位置和火焰在三维空间中的法线方向，而SPIV测量所识别的火焰轮廓的对流。根据反应区的三维对流和绝对传播的矢量差，计算了三维位移速度（sT）。瞬时火焰的实现显示了大的动态范围的localsT和本地流量传输，同时也揭示了解决这些数量在3D中的重要性。几个火焰流配置显示沿着火焰表面和每个唯一定义的局部火焰传输沿着个别火焰实现。进行了详细的不确定性和敏感性分析，确认了方法和操作条件下解决的thesT分布的有效性。的不同机制导致的大分布的ST为给定的操作的讨论包括和证明在这个早期阶段的缸内火焰发展的复杂性。所提出的方法的局限性进行了讨论，特别是在需要提高空间分辨率和额外的体积信息。所提出的工作的优点和局限性提供了一个更好的理解是什么进一步需要更好地解决当地的三维火焰传输在发动机的实验和数值方法。
This paper presents the first results toward experimentally resolving the local three-dimensional (3D) flame propagation and turbulence–chemistry interaction in a spark-ignition engine using temporally resolved multi-planar laser diagnostics. The experimental method utilizes simultaneous dual-plane laser induced fluorescence (LIF) of OH and stereoscopic PIV (SPIV) to locally resolve 3D flame displacement speed during the early flame development when less than 5% of the mass has been consumed. OH-LIF is used to track the reaction-zone position and flame normal direction in 3D space, while SPIV measures the convection of the identified flame contours. Based on the vectorial difference of the 3D convection and absolute propagation of the reaction-zone, the 3D displacement speed (sT) is calculated. An instantaneous flame realization shows a large dynamic range of localsTand local flow transport, while also revealing the importance to resolve these quantities in 3D. Several flame-flow configurations are shown along the flame surface and each uniquely defined the local flame transport along the individual flame realization. A detailed uncertainty and sensitivity analysis is performed, confirming the validity of thesTdistribution resolved for the methodology and operating conditions. A discussion on the different mechanisms leading to the large distribution ofsTfor the given operations is included and testifies to the complex nature of the in-cylinder flame development at this early stage. The limitations of the presented methodology are discussed particularly in the need for improved spatial resolution and additional volumetric information. The merits and limitations of the presented work provides an improved understanding of what is further needed to better resolve local 3D flame transport in engines for both experimental and numerical methodologies.
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影响因子：
4.4
作者：
J. Kerl;C. Lawn;F. Beyrau
通讯作者：
J. Kerl;C. Lawn;F. Beyrau
火花点火发动机中的湍流火焰结构和速度
DOI：
--
发表时间：
1982
期刊：
影响因子：
--
作者：
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通讯作者：
J. Keck
DOI：
10.1016/j.proci.2010.05.026
发表时间：
2011
期刊：
--
影响因子：
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作者：
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通讯作者：
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影响因子：
2.4
作者：
Baum, E.;Peterson, B.;Dreizler, A.
通讯作者：
Dreizler, A.
火焰表面法线测量的交叉平面断层扫描评估
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
D. Knaus;F. Gouldin;D. C. Bingham
通讯作者：
D. C. Bingham