On the Periodically Unsteady Interaction of Wakes, Secondary Flow Development, and Boundary Layer Flow in An Annular Low-Pressure Turbine Cascade: An Experimental Investigation

On the Periodically Unsteady Interaction of Wakes, Secondary Flow Development, and Boundary Layer Flow in An Annular Low-Pressure Turbine Cascade: An Experimental Investigation
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环形低压涡轮叶栅中尾流、二次流发展和边界层流的周期性非定常相互作用:实验研究

DOI:
10.1115/1.4043577
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发表时间:
2019
期刊:
Journal of Turbomachinery
影响因子:
--
通讯作者:
Mailach
Mailach
中科院分区:
--
文献类型:
--
作者:
Sinkwitz;Winhart;Engelmann;di Mare;Mailach

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本文中报告的实验结果说明了周期性非定常尾流对翼型和端壁边界层发展的时间依赖性影响,从而对二次流系统产生影响。在鲁尔大学波鸿热涡轮机和航空发动机系的环形1.5级轴向涡轮机试验台上进行了试验研究。研究对象是一个经过修改的T106型面低压涡轮机(LPT)定子排,其代表性出口流雷诺数为200,000。通过使用环形几何形状代替线性叶栅,可以表示曲线端壁、不均匀性、跨翼展增加的节距和径向流动迁移的影响。进入的尾流是由配备有圆柱形棒的变速驱动转子产生的。特别强调的是尾流引起的经常性的形成,抑制,削弱,和位移的个别涡和分离的流动制度。为此,基于一组全面的时间分辨测量数据,在频域内研究了撞击杆尾流和边界层流动的相互作用,以及分离及其沿着通道端壁和叶片吸力面的周期性操纵。
The experimental results reported in this contribution address the time-dependent impact of periodically unsteady wakes on the development of profile and end wall boundary layers and consequently on the secondary flow system. Experimental investigations are conducted on an annular 1.5 stage axial turbine rig at Ruhr-Universität Bochum’s Chair of Thermal Turbomachines and Aeroengines. The object under investigation is a modified T106 profile low-pressure turbine (LPT) stator row at a representative exit flow Reynolds number of 200,000. By making use of an annular geometry instead of a linear cascade, the influence of curvilinear end walls, nonuniform, increasing pitch across the span and radial flow migration can be represented. Incoming wakes are generated by a variable-speed driven rotor equipped with cylindrical bars. Special emphasis is put on the wake-induced recurrent formation, suppression, weakening, and displacement of individual vortices and separated flow regimes. For this, based on a comprehensive set of time-resolved measurement data, the interaction of impinging bar wakes and boundary layer flow and thus separation and its periodic manipulation along the passage end walls and on the blade suction surface are studied within the frequency domain.
高扬程 LPT 涡轮叶栅中通过尾流扰动的二次流的锁相研究
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发表时间: 2015
期刊: Journal of Turbomachinery
影响因子: --
作者:
Daniele Infantino;F. Satta;D. Simoni;M. Ubaldi;P. Zunino;F. Bertini
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改进 T106 叶片的 1.5 级全环形 LPT 叶栅二次流周期性非稳态尾流影响的实验研究
DOI: 10.1115/gt2017-64390
发表时间: 2017
影响因子: 1.7
作者:
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DOI: 10.1115/1.4042284
发表时间: 2019-02
期刊: Journal of Turbomachinery
影响因子: --
作者:
Martin Sinkwitz;Benjamin Winhart;D. Engelmann;F. Mare;R. Mailach
通讯作者: Martin Sinkwitz;Benjamin Winhart;D. Engelmann;F. Mare;R. Mailach
DOI: 10.1115/1.4042283
发表时间: 2019-02
期刊: Journal of Turbomachinery
影响因子: --
作者:
Benjamin Winhart;Martin Sinkwitz;A. Schramm;D. Engelmann;F. Mare;R. Mailach
通讯作者: Benjamin Winhart;Martin Sinkwitz;A. Schramm;D. Engelmann;F. Mare;R. Mailach
关于环形 LPT 叶栅中尾流、二次流发展和边界层流的周期性不稳定相互作用:第 2 部分 – 数值研究
DOI: 10.1115/gt2018-76873
发表时间: 2018
期刊: Volume 2A: Turbomachinery
影响因子: --
作者:
Winhart;Sinkwitz;Engelmann;di Mare;Mailach
通讯作者: Mailach