Corner Separation Control by Boundary Layer Suction Applied to a Highly Loaded Axial Compressor Cascade
Corner Separation Control by Boundary Layer Suction Applied to a Highly Loaded Axial Compressor Cascade
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DOI：
10.3390/en7127994
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发表时间：
2014-11
期刊：
影响因子：
3.2
通讯作者：
Yangwei Liu;Sun Jinjing;Lipeng Lu
中科院分区：
文献类型：
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作者：
Yangwei Liu;Sun Jinjing;Lipeng Lu
角点分离控制由于能有效地提高发动机的性能和能量利用率而受到广泛关注。在设计和非设计条件下，对边界层抽吸对高负荷压气机叶栅角区分离的影响进行了数值研究。提出了两种新的BLS槽结构，并对五种吸力槽结构进行了研究和比较。给出了在一定工作冲角范围内的平均静压升、出口损失系数、通道堵塞和气流转向角，并进行了系统的比较。研究了3 °和7 °冲角下的有效损失去除、叶片载荷、出口偏差和总压损失的分布。在相同的吸入流量为进口流量的0.7%的情况下，端壁上的俯仰方向吸入槽在整个运行冲角上表现出更好的最优性能。在7 °冲角下，采用一个位于吸力面上的展向槽和一个位于端壁上的节向槽的新型复合槽结构，总压损失最大可降低39.4%。
Control of corner separation has attracted much interest due to its improvement of performance and energy utilization in turbomachinery. Numerical studies have been performed under both design and off-design flow conditions to investigate the effects of boundary layer suction (BLS) on corner separation in a highly loaded compressor cascade. Two new BLS slot configurations are proposed and a total of five suction slot configurations were studied and compared. Averaged static pressure rise, exit loss coefficient, passage blockage and flow turning angle have been given and compared systematically over a range of operation incidence angles. Distributions of significant loss removal, blade loading, exit deviation and total pressure loss at 3 degree and 7 degree incidence have also been studied. Under the same suction mass flows of 0.7% of the inlet mass flows, the pitchwise suction slot on the endwall shows a better optimal performance over the whole operation incidence among single suction slots. By using of the new proposed compound slot configuration with one spanwise slot on the blade suction side and one pitchwise slot on the endwall, the maximum reduction of total pressure loss at 7 degree incidence can be 39.4%.