The role of gas-to-wall temperature ratio on bypass transition along a highly loaded turbine guide vane is investigated through time-resolved heat flux measurements for different flow conditions. The tests are conducted in the von Karman Institute (VKI) isentropic compression tube (CT-2) facility. High response thin films mounted on the vane (VKI LS89 airfoil) coupled with analog circuits are used for the heat flux measurements. The first detectable wall heat flux fluctuations denote the onset of transition which is also evaluated by both the heat transfer coefficient and the intermittency factor distributions along the suction side. The exit Mach number is kept constant during each test by means of a downstream sonic throat while the gas-to-wall temperature ratio is varied from 1.14 to 1.51 by changing the inlet gas temperature. Four test cases are considered for different exit Mach numbers (0.52 and 0.86) and freestream turbulence intensity levels (0.8% and 5.3%) while the isentropic exit chord Reynolds number is maintained at 106. In the present test campaign, the length and the evolution of the phenomenon indicate a measurable effect of the gas-to-wall temperature ratio for test cases with mild pressure gradients.
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Investigation of Thermal Effect on Bypass Transition on a High-Pressure Turbine Guide Vane
Tânia S. Cação Ferreira,
Tânia S. Cação Ferreira
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: cacao@vki.ac.be
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: cacao@vki.ac.be
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Nikolaos Vasilakopoulos,
Nikolaos Vasilakopoulos
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: nivasilakopoulos@gmail.com
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: nivasilakopoulos@gmail.com
Search for other works by this author on:
Tony Arts
Tony Arts
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: arts@vki.ac.be
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: arts@vki.ac.be
Search for other works by this author on:
Tânia S. Cação Ferreira
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: cacao@vki.ac.be
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: cacao@vki.ac.be
Nikolaos Vasilakopoulos
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: nivasilakopoulos@gmail.com
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: nivasilakopoulos@gmail.com
Tony Arts
Jacques Chauvin Laboratory,
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: arts@vki.ac.be
Turbomachinery and Propulsion Department,
von Karman Institute for Fluid Dynamics,
Rhode-Saint-Genèse B1640, Belgium
e-mail: arts@vki.ac.be
1Corresponding author.
2Present address: N. Kazantzaki, 57 Zografou 15772, Athens, Greece.
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received October 17, 2018; final manuscript received October 30, 2018; published online January 21, 2019. Editor: Kenneth Hall.
J. Turbomach. May 2019, 141(5): 051006 (9 pages)
Published Online: January 21, 2019
Article history
Received:
October 17, 2018
Revised:
October 30, 2018
Citation
Cação Ferreira, T. S., Vasilakopoulos, N., and Arts, T. (January 21, 2019). "Investigation of Thermal Effect on Bypass Transition on a High-Pressure Turbine Guide Vane." ASME. J. Turbomach. May 2019; 141(5): 051006. https://doi.org/10.1115/1.4041909
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