0
Research Papers: Gas Turbines: Heat Transfer

Effect of Rotation on a Gas Turbine Blade Internal Cooling System: Experimental Investigation

[+] Author and Article Information
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

Emanuele Burberi, Carlo Carcasci, Lorenzo Cocchi, Bruno Facchini

DIEF—Department of Industrial Engineering,
University of Florence,
Via di Santa Marta 3,
Florence 50139, Italy

Alessandro Armellini, Luca Casarsa, Luca Furlani

Polytechnical Department of Engineering
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 139(10), 101902 (Jun 01, 2017) (13 pages) Paper No: GTP-17-1076; doi: 10.1115/1.4036576 History: Received February 22, 2017; Revised March 29, 2017

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.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Metzger, D. , and Bunker, R. , 1990, “ Local Heat Transfer in Internally Cooled Turbine Airfoil Leading Edge Regions: Part II—Impingement Cooling With Film Coolant Extraction,” ASME J. Turbomach., 112(3), pp. 459–466. [CrossRef]
Metzger, D. E. , Yamashita, T. , and Jenkins, C. , 1969, “ Impingement Cooling of Concave Surfaces With Lines of Circular Air Jets,” ASME J. Eng. Gas Turbines Power, 91(3), pp. 149–155. [CrossRef]
Metzger, D. , Takeuchi, D. , and Kuenstler, P. , 1973, “ Effectiveness and Heat Transfer With Full-Coverage Film Cooling,” ASME J. Eng. Gas Turbines Power, 95(3), pp. 180–184. [CrossRef]
Kercher, D. , and Tabakoff, W. , 1970, “ Heat Transfer by a Square Array of Round Air Jets Impinging Perpendicular to a Flat Surface Including the Effect of Spent Air,” ASME J. Eng. Gas Turbines Power, 92(1), pp. 73–82. [CrossRef]
Martin, H. , 1977, “ Heat and Mass Transfer Between Impinging Gas Jets and Solid Surfaces,” Advances in Heat Transfer, Vol. 13, Academic Press, New York, pp. 1–60.
Florschuetz, L. , Truman, C. , and Metzger, D. , 1981, “ Streamwise Flow and Heat Transfer Distributions for Jet Array Impingement With Crossflow,” ASME Paper No. 81-GT-77.
Florschuetz, L. , Metzger, D. , and Su, C. , 1983, “ Heat Transfer Characteristics for Jet Array Impingement With Initial Crossflow,” ASME Paper No. 83-GT-28.
Behbahani, A. , and Goldstein, R. , 1983, “ Local Heat Transfer to Staggered Arrays of Impinging Circular Air Jets,” ASME J. Eng. Gas Turbines Power, 105(2), pp. 354–360. [CrossRef]
Chupp, R. E. , Helms, H. E. , and McFadden, P. W. , 1969, “ Evaluation of Internal Heat Transfer Coefficients for Impingement-Cooled Turbine Airfoils,” J. Aircr., 6(3), pp. 203–208. [CrossRef]
Metzger, D. E. , Baltzer, R. , and Jenkins, C. , 1972, “ Impingement Cooling Performance in Gas Turbine Airfoils Including Effects of Leading Edge Sharpness,” ASME J. Eng. Gas Turbines Power, 94(3), pp. 219–225. [CrossRef]
Hrycak, P. , 1981, “ Heat Transfer From a Row of Impinging Jets to Concave Cylindrical Surfaces,” Int. J. Heat Mass Transfer, 24(3), pp. 407–419. [CrossRef]
Bunker, R. , and Metzger, D. , 1990, “ Local Heat Transfer in Internally Cooled Turbine Airfoil Leading Edge Regions: Part II—Impingement Cooling Without Film Coolant Extraction,” ASME J. Turbomach., 112(3), pp. 451–458. [CrossRef]
Taslim, M. , Pan, Y. , and Spring, S. , 2001, “ An Experimental Study of Impingement on Roughened Airfoil Leading-Edge Walls With Film Holes,” ASME Paper No. 2001-GT-0152.
Taslim, M. , Bakhtari, K. , and Liu, H. , 2003, “ Experimental and Numerical Investigation of Impingement on a Rib-Roughened Leading-Edge Wall,” ASME Paper No. GT2003-38118.
Taslim, M. , and Bethka, D. , 2009, “ Experimental and Numerical Impingement Heat Transfer in an Airfoil Leading-Edge Cooling Channel With Cross-Flow,” ASME J. Turbomach., 131(1), p. 011021. [CrossRef]
Elebiary, K. , and Taslim, M. , 2013, “ Experimental/Numerical Crossover Jet Impingement in an Airfoil Leading-Edge Cooling Channel,” ASME J. Turbomach., 135(1), p. 011037. [CrossRef]
Andrei, L. , Carcasci, C. , Da Soghe, R. , Facchini, B. , Maiuolo, F. , Tarchi, L. , and Zecchi, S. , 2013, “ Heat Transfer Measurements in a Leading Edge Geometry With Racetrack Holes and Film Cooling Extraction,” ASME J. Turbomach., 135(3), p. 031020. [CrossRef]
Facchini, B. , Maiuolo, F. , Tarchi, L. , and Ohlendorf, N. , 2013, “ Experimental Investigation on the Heat Transfer in a Turbine Airfoil Leading Edge Region: Effects of The Wedge Angle and Jet Impingement Geometries,” European Turbomachinery Conference (ETC), Lappeenranta, Finland, Apr. 15–19, Paper No. ETC2013-130.
Iacovides, H. , Kounadis, D. , Launder, B. E. , Li, J. , and Xu, Z. , 2005, “ Experimental Study of the Flow and Thermal Development of a Row of Cooling Jets Impinging on a Rotating Concave Surface,” ASME J. Turbomach., 127(1), pp. 222–229. [CrossRef]
Craft, T. , Iacovides, H. , and Mostafa, N. , 2008, “ Modelling of Three-Dimensional Jet Array Impingement and Heat Transfer on a Concave Surface,” Int. J. Heat Fluid Flow, 29(3), pp. 687–702. [CrossRef]
Craft, T. J. , Iacovides, H. , and Mostafa, N. A. , 2008, “ Numerical Modelling of Flow and Heat Transfer From an Array of Jets Impinging Onto a Concave Surface Under Stationary and Rotating Conditions,” ASME Paper No. GT2008-50624.
Hong, S. K. , Lee, D. H. , and Cho, H. H. , 2008, “ Heat/Mass Transfer Measurement on Concave Surface in Rotating Jet Impingement,” J. Mech. Sci. Technol., 22(10), pp. 1952–1958. [CrossRef]
Hong, S. K. , Lee, D. H. , and Cho, H. H. , 2009, “ Effect of Jet Direction on Heat/Mass Transfer of Rotating Impingement Jet,” Appl. Therm. Eng., 29(14), pp. 2914–2920. [CrossRef]
Hong, S. K. , Lee, D. H. , and Cho, H. H. , 2009, “ Heat/Mass Transfer in Rotating Impingement/Effusion Cooling With Rib Turbulators,” Int. J. Heat Mass Transfer, 52(13), pp. 3109–3117. [CrossRef]
Deng, H. , Gu, Z. , Zhu, J. , and Tao, Z. , 2012, “ Experiments on Impingement Heat Transfer With Film Extraction Flow on the Leading Edge of Rotating Blades,” Int. J. Heat Mass Transfer, 55(21), pp. 5425–5435. [CrossRef]
Jung, E. Y. , Park, C. U. , Lee, D. H. , Park, J. S. , Park, S. , and Cho, H. H. , 2013, “ Effect of Rotation on Heat Transfer of a Concave Surface With Array Impingement Jet,” ASME Paper No. GT2013-95443.
Bonanni, L. , Carcasci, C. , Facchini, B. , and Tarchi, L. , 2012, “ Experimental Survey on Heat Transfer in a Trailing Edge Cooling System: Effects of Rotation in Internal Cooling Ducts,” ASME Paper No. GT2012-69638.
Chan, T. , Ashforth-Frost, S. , and Jambunathan, K. , 2001, “ Calibrating for Viewing Angle Effect During Heat Transfer Measurements on a Curved Surface,” Int. J. Heat Mass Transfer, 44(12), pp. 2209–2223. [CrossRef]
Bianchini, C. , Burberi, E. , Cocchi, L. , Facchini, B. , Massini, D. , and Pievaroli, M. , 2015, “ Numerical Analysis and Preliminary Experimental Heat Transfer Measurements on a Novel Rotating Leading Edge Model,” 12th International Symposium on Experimental Computational Aerothermodynamics of Internal Flows, Genova, Italy, July 13–16.
Willert, C. , 1997, “ Stereoscopic Digital Particle Image Velocimetry for Application in Wind Tunnel Flows,” Meas. Sci. Technol., 8(12), pp. 1465–1479. [CrossRef]
Furlani, L., Armellini, A., Casarsa, L., 2017, “ Effects of Rotation and Buoyancy Forces on the Flow Field Behavior Inside a Triangular Rib Roughened Channel,” ASME. J. Turbomach., 139(5), p. 051001.
Armellini, A. , Mucignat, C. , Casarsa, L. , and Giannattasio, P. , 2012, “ Flow Field Investigations in Rotating Facilities by Means of Stationary PIV Systems,” Meas. Sci. Technol., 23(2), p. 025302. [CrossRef]
Furlani, L., Armellini, A., Casarsa, L., 2016, “ Rotational Effects on the Flow Field Inside a Leading Edge Impingement Cooling Passage,” Exp. Therm. Fluid Sci., 76, pp. 57–66.
ASME, 1985, “ Measurement Uncertainty in Instrument and Apparatus,” ASME, New York, Standard No. ANSI/ASME PTC 19.1-1985 of Performance Test Code.
Kline, S. J. , and McClintock, F. A. , 1953, “ Describing Uncertainties in Single Sample Experiments,” Mech. Eng., 75(1), pp. 3–8.
Armellini, A. , Casarsa, L. , and Giannattasio, P. , 2009, “ Separated Flow Structures Around a Cylindrical Obstacle in a Narrow Channel,” Exp. Therm. Fluid Sci., 33(4), pp. 604–619. [CrossRef]
Andreini, A. , Burberi, E. , Cocchi, L. , Facchini, B. , Massini, D. , and Pievaroli, M. , 2015, “ Heat Transfer Investigation on an Internal Cooling System of a Gas Turbine Leading Edge Model,” Energy Procedia, 82, pp. 222–229. [CrossRef]
Burberi, E. , Massini, D. , Cocchi, L. , Mazzei, L. , Andreini, A. , and Facchini, B. , 2017, “ Effect of Rotation on a Gas Turbine Blade Internal Cooling System: Numerical Investigation,” ASME J. Turbomach., 139(3), p. 031005. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Sectional view of LE model. Measures are in mm.

Grahic Jump Location
Fig. 5

PIV reference system and investigated planes

Grahic Jump Location
Fig. 6

Average heat transfer coefficient uncertainty for the whole test matrix

Grahic Jump Location
Fig. 7

Average Nusselt results in static conditions

Grahic Jump Location
Fig. 8

2D Nuj distribution for a whole blade configuration at Rej = 10,000, Roj = 0 and Rej = 30,000, Roj = 0

Grahic Jump Location
Fig. 9

Nuj,ave distribution comparison for different Rej in TIP condition: (a) Nuj,ave circumferential distribution and (b) Nuj,ave radial distribution

Grahic Jump Location
Fig. 10

PIV velocity maps in static conditions for a whole blade configuration at Rej = 30,000

Grahic Jump Location
Fig. 13

Nuj,ave circumferential distributions comparison between TIP and HUB conditions: (a) Nuj,ave circumferential distribution in TIP conditions and (b) Nuj,ave circumferential distribution in HUB conditions

Grahic Jump Location
Fig. 14

2D Nuj distributions at Rej = 10,000 and Roj=0–0.05 for the TIP condition

Grahic Jump Location
Fig. 15

Nuj differences between SS and PS at different Roj and crossflow conditions: (a) TIP, (b) MID, and (c) HUB

Grahic Jump Location
Fig. 16

PIV velocity maps in rotating conditions for a whole blade configuration at Rej = 30,000 and Roj = 0.05

Grahic Jump Location
Fig. 17

Velocity profiles for HUB and TIP conditions, effect of rotation at Rej = 30,000

Grahic Jump Location
Fig. 12

2D Nuj distributions at Rej = 10,000, Roj=0.02 and Rej = 10,000, Roj = 0.05

Grahic Jump Location
Fig. 11

Average Nuj variation with Roj: (a) Effect of rotation on Nuj,ave for all the test points and (b) Nuj,ave percentage variation for all the test points

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In