| 摘要: |
| 为了研究非设计状态下的上游尾迹在叶栅通道内的形态演化与发展，分析尾迹与叶片吸力面附面层的相互作用，基于高负荷低压涡轮（LPT）叶型Packb对非设计状态下尾迹输运进行了研究。研究主要通过数值模拟的方法进行，使用CFX软件，利用LES模型耦合Smagorinsky亚格子模型。讨论了非定常来流0°和+10°攻角工况下，尾迹与吸力面附面层相互作用的差异。分析发现，+10°攻角工况时，尾迹对附面层转捩的促进作用较0°攻角工况时更为显著；+10°攻角工况时，尾迹与附面层的相互作用时间更长，尾迹诱导转捩的起始位置更靠上游。 |
| 关键词: 攻角 附面层 上游尾迹 尾迹作用时间 尾迹诱导转捩 涡轮 |
| DOI：10.13675/j.cnki. tjjs. 190100 |
| 分类号:V231.3 |
| 基金项目:天津市自然科学基金 17JCQNJC04600;中央高校资助项目 3122015C006;中国民航大学实验技术创新基金 2016SYCX01天津市自然科学基金（17JCQNJC04600）；中央高校资助项目（3122015C006）；中国民航大学实验技术创新基金 （2016SYCX01）。 |
|
| Effects of Transportation of Wakes on Boundary Layer of High-Load Low Pressure Turbine at Off-Design Condition |
|
QU Hong-chun1,TAN Tian-rong1,GUO Jun-de1,CHEN Tian-ming1,WU Xing-shuang1,SUN Shuang1,2
|
|
1.Department of Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China;2.Tianjin Key Laboratory of Airworthiness and Maintenance of Civil Aircraft,Tianjin 300300,China
|
| Abstract: |
| The evolution of the wake within the cascade passage and interaction of wakes between boundary layer on the suction surface of a high-load low pressure turbine (LPT) cascade Packb has been numerically investigated under unsteady inflow at off-design condition. The simulations are performed with the CFX software, and the LES with Smagorinsky subgrid scale model is used. The difference of interaction between the wakes and the boundary on the suction surface at two incidences is mainly investigated. Moreover, it is found that the wakes play a greater role in promoting the transition of the boundary layer at +10° incidence than that at 0° incidence. The interaction time between the wake and the boundary layer is longer at +10° incidence and wake-induced transition onset is more upstream at +10° incidence. |
| Key words: Incidence Boundary layers Upstream wakes Wake interaction time Wakes-induced transition Turbine |
