A detailed aerothermal characterization of an advanced leading edge (LE) cooling system has been performed by means of experimental measurements. Heat transfer coefficient distribution has been evaluated exploiting a steady-state technique using thermochromic liquid crystals (TLCs), while flow field has been investigated by means of particle image velocimetry (PIV). The geometry key features are the multiple impinging jets and the four rows of coolant extraction holes, and their mass flow rate distribution is representative of real engine working conditions. Tests have been performed in both static and rotating conditions, replicating a typical range of jet Reynolds number (Rej), from 10,000 to 40,000, and rotation number (Roj) up to 0.05. Different crossflow conditions (CR) have been used to simulate the three main blade regions (i.e., tip, mid, and hub). The aerothermal field turned out to be rather complex, but a good agreement between heat transfer coefficient and flow field measurement has been found. In particular, jet bending strongly depends on crossflow intensity, while rotation has a weak effect on both jet velocity core and area-averaged Nusselt number. Rotational effects increase for the lower crossflow tests. Heat transfer pattern shape has been found to be substantially Reynolds independent.
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October 2017
Research-Article
Effect of Rotation on a Gas Turbine Blade Internal Cooling System: Experimental Investigation
Daniele Massini,
Daniele Massini
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
e-mail: daniele.massini@htc.de.unifi.it
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
e-mail: daniele.massini@htc.de.unifi.it
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Emanuele Burberi,
Emanuele Burberi
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
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Carlo Carcasci,
Carlo Carcasci
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
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Lorenzo Cocchi,
Lorenzo Cocchi
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
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Bruno Facchini,
Bruno Facchini
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
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Alessandro Armellini,
Alessandro Armellini
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
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Luca Casarsa,
Luca Casarsa
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
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Luca Furlani
Luca Furlani
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
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Daniele Massini
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
e-mail: daniele.massini@htc.de.unifi.it
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
e-mail: daniele.massini@htc.de.unifi.it
Emanuele Burberi
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
Carlo Carcasci
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
Lorenzo Cocchi
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
Bruno Facchini
DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy
Alessandro Armellini
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
Luca Casarsa
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
Luca Furlani
Polytechnical Department of Engineering
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
and Architecture,
University of Udine,
Via delle Scienze 206,
Udine 33100, Italy
1Corresponding author.
Contributed by the Heat Transfer Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received February 22, 2017; final manuscript received March 29, 2017; published online June 1, 2017. Editor: David Wisler.
J. Eng. Gas Turbines Power. Oct 2017, 139(10): 101902 (13 pages)
Published Online: June 1, 2017
Article history
Received:
February 22, 2017
Revised:
March 29, 2017
Citation
Massini, D., Burberi, E., Carcasci, C., Cocchi, L., Facchini, B., Armellini, A., Casarsa, L., and Furlani, L. (June 1, 2017). "Effect of Rotation on a Gas Turbine Blade Internal Cooling System: Experimental Investigation." ASME. J. Eng. Gas Turbines Power. October 2017; 139(10): 101902. https://doi.org/10.1115/1.4036576
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