Experimental characterization of the spatiotemporal dynamics of a turbulent flame in a gas turbine model combustor using computed tomography of chemiluminescence
Experimental characterization of the spatiotemporal dynamics of a turbulent flame in a gas turbine model combustor using computed tomography of chemiluminescence
复制标题
使用化学发光计算机断层扫描对燃气轮机模型燃烧室中湍流火焰的时空动力学进行实验表征
DOI：
10.1016/j.energy.2018.12.215
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发表时间：
2019-03
期刊：
影响因子：
9
通讯作者：
Lu Xingcai
中科院分区：
文献类型：
--
作者：
Ruan Can;Yu Tao;Chen Feier;Wang Sixu;Cai Weiwei;Lu Xingcai
基于最新的计算机层析化学发光(CTC)技术，在旋涡稳定的燃气轮机模型燃烧室上进行了实验研究，获得了受限条件下湍流火焰的时间分辨和三维(3D)动力学。本研究中使用的控制中心系统是以成本效益高但效率高的方式设计的，该系统允许用三个摄像机以1 千赫的重复频率同时记录目标火焰的六个投影。成功地捕捉到了火焰的瞬时拓扑，并观察到了燃烧室内的高瞬变火焰动力学，如局部熄灭和火焰形状变化。基于火焰质心的瞬时和相位平均三维运动的进一步分析表明，目前燃烧室内的火焰呈现螺旋但相对随机的传播和明显的方位旋转，该旋转方向是旋流器对流动施加的旋转方向。研究结果表明，CTC技术能够很好地解决受限燃烧系统中湍流火焰的时空动力学问题，这对于研究贫油燃气轮机的周期性燃烧振荡等燃烧不稳定性具有重要意义。
An experimental study was conducted based on the recently available computed tomography of chemiluminescence (CTC) technique with a swirl-stabilized gas turbine model combustor to obtain both time-resolved and three-dimensional (3D) dynamics of the turbulent flame in confined situation. The CTC system employed in the present study was designed in a cost-effective, but highly-efficient manner, which allows simultaneous recordings of six projections of the target flame with three cameras at a repetition rate of 1 kHz. Instantaneous flame topologies were successfully captured and highly-transient flame dynamics in the combustion chamber, such as local extinction and flame shape variations were also observed. A further analysis based on the instantaneous and phase-averaged 3D movements of the flame centroids suggested that the flame in the present combustor exhibited a helical but relatively stochastic propagation and a distinct azimuthal rotation around the combustor, which is in the direction of rotation imposed by the swirler to the flow. Results obtained in this work demonstrate the capability of the CTC technique to resolve the detailed spatiotemporal dynamics of turbulent flames in confined combustion systems, which is expected to be particularly helpful for the study of combustion instabilities, such as periodic combustion oscillations in fuel-lean gas turbine engines.
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影响因子：
4.4
作者：
S. Wiseman;M. Brear;R. Gordon;I. Marusic
通讯作者：
S. Wiseman;M. Brear;R. Gordon;I. Marusic
影响因子：
4.4
作者：
N. Worth;J. Dawson
通讯作者：
N. Worth;J. Dawson
DOI：
10.1007/s10494-016-9727-4
发表时间：
2016-04
期刊：
Flow, Turbulence and Combustion
影响因子：
--
作者：
B. D. Geraedts;C. Arndt;A. Steinberg
通讯作者：
B. D. Geraedts;C. Arndt;A. Steinberg
影响因子：
3.4
作者：
Floyd, J.;Kempf, A. M.
通讯作者：
Kempf, A. M.
影响因子：
4.4
作者：
D. Galley;S. Ducruix;F. Lacas;D. Veynante
通讯作者：
D. Galley;S. Ducruix;F. Lacas;D. Veynante