Confinement Effects on the Swirling Flow of a Counter-Rotating Swirl Cup
Confinement Effects on the Swirling Flow of a Counter-Rotating Swirl Cup
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DOI：
10.1115/gt2005-68622
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Yongqiang Fu;Jun Cai;S. Jeng;H. Mongia
中科院分区：
文献类型：
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作者：
Yongqiang Fu;Jun Cai;S. Jeng;H. Mongia
燃气轮机燃烧室的性能、排放、可操作性、燃烧室和燃烧室的温度水平和梯度都受到燃烧室参考速度间接表示的约束程度的影响。因此，进行了一项实验研究，以表征由反向旋转旋流杯产生的非反应旋流的气动特性，该特性受测试截面尺寸的影响。采用双组份激光多普勒测速（LDV）系统，在8个宽度为3.0、4.0、4.1、4.3、4.4、4.5、5.0和6.0英寸的方形箱测试段中测量涡流杯产生的流场平均速度分量和雷诺应力，以及无侧限流动。测量在耀斑出口下游3至250毫米的14个轴向距离上进行，并通过2mm的间隔获得径向轮廓。提供了详细的实验数据，以提高对涡流杯产生流场的机理理解，该流场受试验段截面与混合器有效面积之比的影响。基准质量数据计划用于验证最先进的数值模型以及更先进的LES方法。ASME版权所有©2005
Gas turbine combustor’s performance, emissions, operability, liner and dome temperature levels and gradients are affected by the degree of confinement expressed indirectly by the dome reference velocity. An experimental investigation was therefore undertaken to characterize the aerodynamic characteristics of non-reacting swirling flow generated by a counter-rotating swirl cup as affected by the test section dimensions. A two-component Laser Doppler Velocimetry (LDV) system was used to measure the mean velocity components and Reynolds stresses of the flowfield generated by the swirl cup installed in 8 square box test sections with width of 3.0, 4.0, 4.1, 4.3, 4.4, 4.5, 5.0, and 6.0 inch, in addition to unconfined flow. Measurements were carried out at fourteen axial distances ranging from 3 to 250 mm downstream of the flare exit, and the radial profiles are obtained through 2 mm intervals. Detailed experimental data are provided to improve mechanistic understanding of the swirl cup generated flowfield as impacted by the ratio of the test section cross-section to the mixer’s effective area. The benchmark quality data are planned for validating the state-of-the-art numerical models in addition more advanced LES approach.Copyright © 2005 by ASME