Ciorciari, Roberto; Kirik, Ilker; Niehuis, Reinhard
Dokumenttyp:
Konferenzbeitrag / Conference Paper
Titel:
Effects of Unsteady Wakes on the Secondary Flows in the linear T106 Turbine Cascade
Herausgeber Sammlung:
ASME
Titel Konferenzpublikation:
Proceedings of ASME Turbo Expo 2013: Turbine Technical Conference and Exposition GT2013
Untertitel Konferenzpublikation:
June 3-7, 2013, San Antonio, Texas, USA
Konferenztitel:
ASME Turbo Expo (2013, San Antonio, TX)
Konferenztitel:
Turbo Expo, Power for Land, Sea and Air 2013, San Antonio, Tex.
Tagungsort:
San Antonio, USA
Jahr der Konferenz:
2013
Datum Beginn der Konferenz:
03.06.2013
Datum Ende der Konferenz:
07.06.2013
Jahr:
2013
Seiten von - bis:
12
Sprache:
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... »