Enhanced External Aerodynamic Performance of a Generic Combustor Using An Integrated OGV/Prediffuser Design Technique
Enhanced External Aerodynamic Performance of a Generic Combustor Using An Integrated OGV/Prediffuser Design Technique
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使用集成 OGV/预扩散器设计技术增强通用燃烧器的外部空气动力性能
DOI：
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发表时间：
2007
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通讯作者：
J. McGuirk
中科院分区：
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作者：
A. Walker;J. F. Carrotte;J. McGuirk
在本文中，我们使用实验测量来表征的程度，改善外部气动性能（降低总压损失，增加流动品质）的燃气轮机燃烧系统可以通过采用集成OGV/预扩压器技术实现。两个OGV/预扩压器组合进行了测试。第一种是与传统设计方法相对应的基准设计，其中OGV和预扩压器基本上是单独设计的。第二种是“一体化”设计，其中OGV叶片形状已根据早期CFD工作（最终报告编号TT 03 R 01，2003）的建议进行了修改，以产生二次流/尾流结构，使预扩压器能够在更高的面积比下运行，而不会发生边界层分离。这被证明可以增加静压恢复并减少倾卸损失。实验测量上提出了一个完整的环形钻机。几个横向平面用于收集五孔探针数据，这些数据允许检查通过OGV、预扩压器入口和出口以及内/外环形供气管道的流动结构。整体性能指标（损失系数）和流量均匀性和质量指标均用于证明集成设计具有上级优势。
In this paper we use experimental measurements to characterize the extent that improved the external aerodynamic performance (reduced total pressure loss, increased flow quality) of a gas-turbine combustion system may be achieved by adopting an integrated OGV/prediffuser technique. Two OGV/prediffuser combinations were tested. The first is a datum design corresponding to a conventional design approach, where the OGV and prediffuser are essentially designed in isolation. The second is an “integrated” design where the OGV blade shape has been modified, following recommendations of earlier CFD work (Final Report No. TT03R01, 2003), to produce a secondary flow/wake structure that allows the prediffuser to operate at a higher area ratio without boundary layer separation. This is demonstrated to increase static pressure recovery and reduce dump losses. Experimental measurements are presented on a fully annular rig. Several traverse planes are used to gather five-hole probe data that allow the flow structure through the OGV, at the inlet and exit of the prediffuser, and in the inner/outer annulus supply ducts to be examined. Both overall performance measures (loss coefficients) and measures of flow uniformity and quality are used to demonstrate that the integrated design is superior.