Ciorciari, Roberto; Kirik, Ilker; Niehuis, Reinhard
Document type:
Konferenzbeitrag / Conference Paper
Title:
Effects of Unsteady Wakes on the Secondary Flows in the linear T106 Turbine Cascade
Collection editors:
ASME
Title of conference publication:
Proceedings of ASME Turbo Expo 2013: Turbine Technical Conference and Exposition GT2013
Subtitle of conference publication:
June 3-7, 2013, San Antonio, Texas, USA
Conference title:
ASME Turbo Expo (2013, San Antonio, TX)
Conference title:
Turbo Expo, Power for Land, Sea and Air 2013, San Antonio, Tex.
Venue:
San Antonio, USA
Year of conference:
2013
Date of conference beginning:
03.06.2013
Date of conference ending:
07.06.2013
Year:
2013
Pages from - to:
12
Language:
Englisch
Abstract:
In modern low pressure turbines the efforts to increase aerodynamic
blade loading by increasing blade pitch and optimising
midspan performance in order to reduce weight and complexity
can produce increased losses in the endwall region. Airfoils of
high flow turning and high pressure gradients between the blades
generate strong secondary flows which impair the global aerodynamic
performance of the blades. In addition, the unsteady
incoming wakes take influence on transition phenomena on the
blade surfaces and the inlet boundary layer, and consequently
affect the development and the evolution of the secondary flows.
In this paper the T106 cascade is used to identify the effect of
unsteady wakes on the development of secondary flows in a turbine
cascade. Numerical and experimental results are compared
at different flux coefficients and Strouhal numbers, the relative
differences and similarities are analysed. «
In modern low pressure turbines the efforts to increase aerodynamic
blade loading by increasing blade pitch and optimising
midspan performance in order to reduce weight and complexity
can produce increased losses in the endwall region. Airfoils of
high flow turning and high pressure gradients between the blades
generate strong secondary flows which impair the global aerodynamic
performance of the blades. In addition, the unsteady
incoming wakes take influence on transition phenomen... »