Effect of boundary conditions on downstream vorticity from counter-rotating swirlers
Effect of boundary conditions on downstream vorticity from counter-rotating swirlers
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边界条件对反向旋转旋流器下游涡度的影响
DOI：
10.1016/j.cja.2014.12.014
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发表时间：
2015-02
影响因子：
5.7
通讯作者：
Sung Chih-Jen
中科院分区：
文献类型：
--
作者：
Huo Weiye;Lin Yuzhen;Zhang Chi;Sung Chih-Jen
采用粒子图像测速仪(PIV)测量了多旋流和单旋流回流燃烧室内的非反应流场。采用两种不同的边界条件，对环形燃烧室内单个受限旋流器和多个旋流器的速度场、旋涡结构和总涡水平进行了实验研究。实验研究了边界条件对旋流器下游多个位置的流场的影响，结果表明，多旋流器情况下的中心涡比单旋流器情况下的中心涡更集中。两种情况下旋流器出口中心涡的涡量和平均截面涡量都较小。这两个统计量在旋流器出口下游20 mm附近逐渐增加到最大值，然后减小。研究还发现，多旋流情况下的中心涡始终大于单旋流情况下的中心涡。这些结果证明了边界条件对旋流流动特性的关键影响，为了解试验台燃烧室和全尺寸环形燃烧室实验的差异提供了依据。
Particle image velocimetry (PIV) is utilized to measure the non-reacting flow field in a reflow combustor with multiple and single swirlers. The velocity field, vortex structure and total vorticity levels are experimentally obtained using two different boundary conditions, representing a single confined swirler and multiple swirlers in an annular combustor. The influence of the boundary conditions on the flow field at several locations downstream of the swirlers is experimentally investigated, showing that the central vortex in the multi-swirler case is more concentrated than in the single-swirler case. The vorticity of the central vortex and average cross-sectional vorticity are relatively low at the swirler outlet in both cases. Both of these statistics gradually increase to the maximum values near 20 mm downstream of the swirler outlet, and subsequently decrease. It is also found that the central vortex in the multi-swirler case is consistently greater than the single-swirler case. These results demonstrate the critical influence of boundary conditions on flow characteristic of swirling flow, providing insight into the difference of the experiments on test-bed combustor and the full-scale annular combustors.
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影响因子：
9
作者：
Paolo Gobbato;M. Masi;A. Toffolo;A. Lazzaretto;G. Tanzini
通讯作者：
Paolo Gobbato;M. Masi;A. Toffolo;A. Lazzaretto;G. Tanzini
影响因子：
0.8
作者：
Jean-François Bourgouin;J. Moeck;D. Durox;T. Schuller;S. Candel
通讯作者：
Jean-François Bourgouin;J. Moeck;D. Durox;T. Schuller;S. Candel
影响因子：
2
作者：
M. Boutazakhti;P. Sullivan;M. Thomson;I. Yimer
通讯作者：
M. Boutazakhti;P. Sullivan;M. Thomson;I. Yimer
DOI：
10.1115/gt2005-68622
发表时间：
2005
期刊：
--
影响因子：
--
作者：
Yongqiang Fu;Jun Cai;S. Jeng;H. Mongia
通讯作者：
Yongqiang Fu;Jun Cai;S. Jeng;H. Mongia
DOI：
10.1115/1.2181595
发表时间：
2007
影响因子：
1.5
作者：
Tongxun Yi;E. Gutmark
通讯作者：
Tongxun Yi;E. Gutmark