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
复制标题
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:
影响因子:
--
通讯作者:
Mailach
中科院分区:
文献类型:
--
作者:
Sinkwitz;Winhart;Engelmann;di Mare;Mailach
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.
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DOI:
10.1115/gt2015-42480
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
通讯作者:
F. Bertini
影响因子:
1.7
作者:
Martin Sinkwitz;D. Engelmann;R. Mailach
通讯作者:
R. Mailach
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
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