Unsteady Inflow Effects on the Wake Shed from a High-Lift LPT Blade Subjected to Boundary Layer Laminar Separation
文献类型：期刊论文
| 作者 | Francesca Satta; Marina Ubaldi; Pietro Zunino |
| 刊名 | JOURNAL OF THERMAL SCIENCE
 |
| 出版日期 | 2012 |
| 卷号 | 21期号:2页码:97,108 |
| 关键词 | Wake-wake Unsteady Interaction High-lift Blade Profiles Low-pressure Turbine Blade Wake |
| 英文摘要 | An experimental investigation on the near and far wake of a cascade of high-lift low-pressure turbine blades subjected to boundary layer separation over the suction side surface has been carried out, under steady and unsteady inflows. Two Reynolds number conditions, representative of take-off/landing and cruise operating conditions of the real engine, have been tested. The effect of upstream wake-boundary layer interaction on the wake shed from the profile has been investigated in a three-blade large-scale linear turbine cascade. The comparison between the wakes shed under steady and unsteady inflows has been performed through the analysis of mean velocity and Reynolds stress components measured at midspan of the central blade by means of a two-component crossed miniature hot-wire probe. The wake development has been analyzed in the region between 2% and 100% of the blade chord from the central blade trailing edge, aligned with the blade exit direction. Wake integral parameters, half-width and maximum velocity defects have been evaluated from the mean velocity distributions to quantify the modifications induced on the vane wake by the upstream wake. Moreover the thicknesses of the two wake shear layers have been considered separately in order to identify the effects of Reynolds number and incoming flow on the wake shape. The self-preserving state of the wake has been looked at, taking into account the different thicknesses of the two shear layers. The evaluation of the power density spectra of the velocity fluctuations allowed the study of the wake unsteady behavior, and the detection of the effects induced by the different operating conditions on the trailing edge vortex shedding. |
| 公开日期 | 2013-01-07 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/51727]  |
| 专题 | 工程热物理研究所_Journal of Thermal Science |
| 推荐引用方式 GB/T 7714 | Francesca Satta,Marina Ubaldi,Pietro Zunino. Unsteady Inflow Effects on the Wake Shed from a High-Lift LPT Blade Subjected to Boundary Layer Laminar Separation[J]. JOURNAL OF THERMAL SCIENCE,2012,21(2):97,108. |
| APA | Francesca Satta,Marina Ubaldi,&Pietro Zunino.(2012).Unsteady Inflow Effects on the Wake Shed from a High-Lift LPT Blade Subjected to Boundary Layer Laminar Separation.JOURNAL OF THERMAL SCIENCE,21(2),97,108. |
| MLA | Francesca Satta,et al."Unsteady Inflow Effects on the Wake Shed from a High-Lift LPT Blade Subjected to Boundary Layer Laminar Separation".JOURNAL OF THERMAL SCIENCE 21.2(2012):97,108. |
入库方式： OAI收割
来源：工程热物理研究所
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