Ciorciari, Roberto; Kirik, Ilker; Niehuis, Reinhard
Document type:
Konferenzbeitrag / Conference Paper
Title:
Investigating unsteady secondary flows in a linear low pressure turbine cascade: a combined experimental and numerical study
Title of conference publication:
Proceedings of 11th European Conference on Turbomachinery Fluid dynamics & Thermodynamics ETC11, March 23-27, 2015, Madrid, Spain
Conference title:
European Turbomachinery Conference (11., 2015, Madrid)
Venue:
Madrid, Spain
Year of conference:
2015
Date of conference beginning:
23.03.2015
Date of conference ending:
27.03.2015
Year:
2015
Pages from - to:
13
Language:
Englisch
Abstract:
The effects of unsteady incoming wakes on the secondary flow in a linear low pressure turbine
cascade, named T106, were investigated by experiments in a high speed cascade wind tunnel
and by U-RANS simulations. In this paper, results of a variety of cases with different Strouhal
numbers and flow coefficients were compared and the differences analysed.
The upstream incoming wakes in the experiment were generated by a wake generator and were
considered in the CFD simulations likewise. The computations have been conducted using the
flow solver TRACE. Time-averaged and time-accurate ensemble averaged experimental data
permit the evaluation of the numerical U-RANS predictions for some of the investigated configurations.
3D CTA hot-wire traverses downstream the cascade permit to analyse the velocity
and the turbulent flow field for the investigated configurations. Results of a newly implemented
fast response total pressure probe allow to compare the relative unsteady ensemble averaged
fluctuations to the CFD results downstream of the cascade. «
The effects of unsteady incoming wakes on the secondary flow in a linear low pressure turbine
cascade, named T106, were investigated by experiments in a high speed cascade wind tunnel
and by U-RANS simulations. In this paper, results of a variety of cases with different Strouhal
numbers and flow coefficients were compared and the differences analysed.
The upstream incoming wakes in the experiment were generated by a wake generator and were
considered in the CFD simulations likewise. Th... »