0
Research Papers

Effect of Temperature Ratio on Jet Impingement Heat Transfer in Active Clearance Control Systems

[+] Author and Article Information
Riccardo Da Soghe

Ergon Research srl,
via Campani 50,
50127 Florence, Italy
e-mail: riccardo.dasoghe@ergonresearch.it

Cosimo Bianchini

Ergon Research srl,
via Campani 50,
50127 Florence, Italy
e-mail: cosimo.bianchini@ergonresearch.it

Jacopo D’Errico

Ergon Research srl,
via Campani 50,
50127 Florence, Italy
e-mail: jacopo.derrico@ergonresearch.it

Lorenzo Tarchi

Ergon Research srl,
via Campani 50,
50127 Florence, Italy
e-mail: lorenzo.tarchi@ergonresearch.it

1Corresponding author.

Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the Journal of Turbomachinery. Manuscript received October 11, 2018; final manuscript received March 14, 2019; published online March 29, 2019. Assoc. Editor: Kenneth Hall.

J. Turbomach 141(8), 081009 (Mar 29, 2019) (8 pages) Paper No: TURBO-18-1287; doi: 10.1115/1.4043217 History: Received October 11, 2018; Accepted March 14, 2019

Impinging jet arrays are typically used to cool several gas turbine parts. Some examples of such applications can be found in the internal cooling of high-pressure turbine airfoils or in the turbine blade tip clearances control of aero-engines. The effect of the wall-to-jets temperature ratio (TR) on heat transfer is generally neglected by the correlations available in the open literature. In the present contribution, the impact of the temperature ratio on the heat transfer for a real engine active clearance control system is analyzed by means of validated computational fluid dynamics (CFD) computations. At different jets Reynolds number and considering several impingement array arrangements, a wide range of target wall-to-jets temperature ratio is accounted for. Computational results prove that both local and averaged Nusselt numbers reduce with increasing. An in-depth analysis of the numerical data shows that the last mentioned evidence is motivated by both the heat transfer incurring between the spent coolant flow and the fresh jets and the variation of gas properties with temperature through the boundary layer. A scaling procedure, based on the TR power law, was proposed to estimate the Nusselt number at different wall temperature levels necessary to correct available open-literature correlations, typically developed with small temperature differences, for real engine applications.

FIGURES IN THIS ARTICLE
<>
Copyright © 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Justak, J. F., and Doux, C., 2009, “Self-acting Clearance Control for Turbine Blade Outer Air Seals,” ASME Turbo Expo, GT2009-59683.
Rahman, M. H., Kim, S. I., and Hassan, I., 2012, “Effects of Inlet Temperature Uniformity and Nonuniformity on the Tip Leakage Flow and Rotor Blade Tip and Casing Heat Transfer Characteristics,” ASME J. Turbomach, 134(2), p. 021004. [CrossRef]
Qingjun, Z., Jianyi, D., Huishe, W., Xiaolu, Z., and Jianzhong, X., 2010, “Tip Clearance Effects on Inlet Hot Streak Migration Characteristics in High Pressure Stage of a Vaneless Counter-rotating Turbine,” ASME J. Turbomach, 132(1), p. 011005. [CrossRef]
Halila, E., Lenahan, D., and Thomas, T., 1982, High Pressure Turbine Test Hardware, NASA CR-167955.
Beck, B., and Fasching, W., 1982, CF6 Jet Engine Performance Improvement—Low Pressure Turbine Active Clearance Control, NASA CR-165557.
Andreini, A., and Da Soghe, R., 2012, “Numerical Characterization of Aerodynamic Losses of Jet Arrays for Gas Turbine Applications,” ASME J. Eng. Gas Turbine Power, 134(5), p. 052504. [CrossRef]
Da Soghe, R., and Andreini, A., 2013, “Numerical Characterization of Pressure Drop for Turbine Casing Impingement Cooling System,” ASME J. Turbomach, 135(3), p. 031017. [CrossRef]
Da Soghe, R., Bianchini, C., Andreini, A., Facchini, B., and Mazzei, L., 2016, “Heat Transfer Augmentation Due to Coolant Extraction on the Cold Side of Active Clearance Control Manifolds,” ASME J. Eng. Gas Turbine Power, 138(2), p. 021507. [CrossRef]
Kercher, D., and Tabakoff, W., 1970, “Heat Transfer by a Square Array of Round Air Jets Impinging Perpendicular to Flat Surface Including the Effect of Spent Air,” ASME J. Eng. Power, 92(1), pp. 73–82. [CrossRef]
Florschuetz, L., Truman, C., and Metzger, D., 1981, “Streamwise Flow and Heat Transfer Distributions for Jet Array Impingement with Crossflow,” ASME J. Heat Transfer, 103(2), pp. 337–342. [CrossRef]
Behbahani, A., and Goldstein, R., 1983, “Local Heat Transfer to Staggered Arrays of Impinging Circular Air Jets,” ASME J. Eng. Power, 105(2), pp. 354–360. [CrossRef]
Goodro, M., Park, J., Ligrani, P. M., Fox, M., and Moon, H.-K., 2007, “Effects of Mach Number and Reynolds Number on Jet Array Impingement Heat Transfer,” ASME Int. J. Heat. Mass. Transfer, 50(1–2), pp. 367–380. [CrossRef]
Park, J., Goodro, M., Ligrani, P. M., Fox, M., and Moon, H.-K., 2007, “Separate Effects of Mach Number and Reynolds Number on Jet Array Impingement Heat Transfer,” ASME J Turbomach, 129(2), pp. 269–280. [CrossRef]
Goodro, M., Park, J., Ligrani, P. M., Fox, M., and Moon, H.-K., 2008, “Effect of Hole Spacing on Spatially-resolved Jet Array Impingement Heat Transfer,” ASME Int. J. Heat Mass. Transfer, 51(25–26), pp. 6243–6253. [CrossRef]
Goodro, M., Park, J., Ligrani, P. M., Fox, M., and Moon, H.-K., 2009, “Effect of Temperature Ratio on Jet Array Impingement Heat Transfer,” ASME J. Heat Transfer, 131(1), p. 012201. [CrossRef]
Goodro, M., Park, J., Ligrani, P. M., Fox, M., and Moon, H.-K., 2010, “Mach Number, Reynolds Number, Jet Spacing Variations: Full Array of Impinging Jets,” AIAA J. Thermophys. Heat Transfer, 24(1), pp. 133–144. [CrossRef]
Zuckerman, N., and Lior, N., 2006, “Jet Impingement Heat Transfer: Physics, Correlations, and Numerical Modeling,” Adv. Heat Transfer, 39, pp. 565–631. [CrossRef]
Ahmed, F., Tucholke, R., Weigand, B., and Meier, K., 2011, “Numerical Investigation of Heat Transfer and Pressure Drop Characteristics for Different Hole Geometries of a Turbine Casing Impingement Cooling System,” ASME Turbo Expo, GT2011-45251.
Ahmed, F., Weigand, B., and Meier, K., 2010, “Heat Transfer and Pressure Drop Characteristics for a Turbine Casing Impingement Cooling System,” ASME International Heat Transfer Conference, IHTC14-22817.
Da Soghe, R., Facchini, B., Micio, M., and Andreini, A., 2012, “Aerothermal Analysis of a Turbine Casing Impingement Cooling System,” Int. J. Rotating Mach., 2012, p. 103583.
Tapinlis, O., Choi, M., Lewis, L. V., Gillespie, D. R. H., and Ciccomascolo, C., 2014, “The Effect of Impingement Jet Heat Transfer on Casing Contraction in a Turbine Case Cooling System,” ASME Turbo Expo, GT2014-26749.
Maffulli, R., and He, L., 2014, “Wall Temperature Effects on Heat Transfer Coefficient for High-pressure Turbines,” J. Propul. Power, 30(4), p. 1080. [CrossRef]
Fitt, A., Forth, C., Robertson, B., and Jones, T., 1986, “Temperature Ratio Effects in Compressible Turbulent Boundary Layers,” Int. J. Heat. Mass. Transfer, 29(1), p. 159. [CrossRef]
Kays, W., and Crawford, M., 1993, Convective Heat and Mass Transfer, McGraw-Hill, New York.
CFX, A., 2011, Solver Theory Guide, Ansys, Inc.
Andreini, A., Da Soghe, R., Mazzei, L., and Facchini, B., 2015, “Heat Transfer Enhancement Due to Coolant Extraction on the Cold Side of Effusion Cooling Plates,” ASME J. Eng. Gas Turbine Power, 137(12), p. 122608. [CrossRef]
Andreini, A., Da Soghe, R., Facchini, B., Maiuolo, F., Tarchi, L., and Coutandin, D., 2013, “Experimental and Numerical Analysis of Multiple Impingement Jet Arrays for an Active Clearance Control System,” ASME J. Turbomach., 135, p. 031016. [CrossRef]
Da Soghe, R., Bianchini, C., Mazzei, L., Andreini, A., Ciani, A., Riccio, G., and Marini, A., 2015, “Thermofluid Dynamic Analysis of a Gas Turbine Transition-piece,” ASME J. Eng. Gas Turbine Power, 137(6), p. 062602. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

ACC system, Ahmed et al. [18]

Grahic Jump Location
Fig. 2

Scheme of an LPT ACC system, Ahmed et al. [19]

Grahic Jump Location
Fig. 3

Tested geometry details

Grahic Jump Location
Fig. 4

Overview of computational grid in the impingement region

Grahic Jump Location
Fig. 5

Comparison between CFD and experiments, Andreini et al. [27]

Grahic Jump Location
Fig. 6

Spanwise-averaged Nusselt distribution—overall TR effect

Grahic Jump Location
Fig. 7

Total temperature on the jet symmetry plane—overall TR effect

Grahic Jump Location
Fig. 8

Impingement jet core θ—overall TR effect

Grahic Jump Location
Fig. 9

Spanwise-averaged Nu* distribution—overall TR effect

Grahic Jump Location
Fig. 10

Spanwise-averaged Nu* distribution—details around the jet stagnation point: (a) Rail 1, (b) Rail 4, and (c) Rail 7

Grahic Jump Location
Fig. 11

Spanwise-averaged Nu distribution—wall temperature distribution effect

Grahic Jump Location
Fig. 12

Spanwise-averaged Nu* distribution—details around jet stagnation point: (a) Rail 1, (b) Rail 4, and (c) Rail 7

Grahic Jump Location
Fig. 13

Optimal best fitting exponent for Nu*—Reynolds number effect

Grahic Jump Location
Fig. 14

Optimal best fitting exponent for the Nu*—H/d effect

Tables

Errata

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