THERMAL SCIENCE

International Scientific Journal

Lei Xi

,

Qicheng Ruan

,

Yuan Gao

,

Jianmin Gao

,

Liang Xu

,

Yunlong Li

STUDY ON FLOW AND HEAT TRANSFER PERFORMANCE OF SINGLE JET IMPINGEMENT COOLING THROUGH VARIABLE-DIAMETER HOLE

ABSTRACT
In this work, the heat transfer and flow characteristics of single jet impinging cooling with three types of hole configurations, namely converging hole, straight hole, and expanded hole, were compared and analyzed numerically. The influence laws of Reynolds number, outlet-to-inlet diameter ratio, and impinging height ratio on the heat transfer, flow, and comprehensive thermal performance of the converging-hole impinging cooling were intensively investigated. Finally, the empirical correlations were fitted and the sensitivity of performance variables to influencing parameters were analyzed for the converging-hole impinging cooling. The results show that the converging hole exhibits the superlative heat transfer performance but the poorest flow performance. The expanded hole exhibits the poorest heat transfer performance but the superlative flow performance. As Re > 24,000, the comprehensive thermal performance of the three types of hole configurations is similar. For the converging-hole impinging cooling, when Reynolds number increases from 6000-30000 under various structural parameters, the average Nusselt number increases by approximately 1.62-2.65 times, and the comprehensive thermal coefficient increases by approximately 1.58-2.45 times. As the outlet-to-inlet diameter ratio increases from 0.5-0.9 under various Reynolds number, the pressure loss coefficient of the converging-hole impinging cooling decreases by approximately 91.47-92.95%, and the corresponding average Nusselt number decreases by 43.61-60.07%. When the impinging height ratio is 2.0, the converging-hole impinging cooling exhibits lower pressure loss coefficients. The parameter sensitivity analysis shows that the average Nusselt number of converging-hole impinging cooling is sensitive to changes in the outlet-to-inlet diameter ratio and Reynolds number, but insensitive to changes in the impinging height ratio. The pressure loss coefficient is highly sensitive to changes in the outlet-to-inlet diameter ratio, but insensitive to changes in the Reynolds number and impinging height ratio. The comprehensive thermal coefficient is highly sensitive to changes in the Reynolds number, but insensitive to changes in the outlet-to-inlet diameter ratio and impinging height ratio.
KEYWORDS
impinging cooling, single jet, variable-diameter hole, flow performance, heat transfer performance
PAPER SUBMITTED: 2024-01-09
PAPER REVISED: 2024-03-20
PAPER ACCEPTED: 2024-03-29
PUBLISHED ONLINE: 2024-05-18
DOI REFERENCE: https://doi.org/10.2298/TSCI240109116X
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 6, PAGES [4499 - 4517]
REFERENCES
  1. Xi, L., et al., Numerical Investigation and Parameter Sensitivity Analysis on Flow and Heat Transfer Performance of Jet Array Impingement Cooling in a Quasi-Leading-Edge Channel, Aerospace, 9 (2022), 2, 87
  2. Wu, W., et al., Leading Edge Impingement Cooling Analysis with Separators of a Real Gas Turbine Blade, Appl. Therm. Eng., 208 (2022), 118275
  3. Fan, X., et al., Cooling Methods for Gas Turbine Blade Leading Edge: Comparative Study on Impingement Cooling, Vortex Cooling and Double Vortex Cooling, Int. Commun. Heat Mass, 100 (2019), Jan., pp. 133-145
  4. Forster, M., et al., Experimental and Numerical Investigation of Jet Impingement Cooling on a Concave Leading Edge of a Generic Gas Turbine Blade, Int. J. Therm. Sci., 164 (2021), 106862
  5. Ekkad, S. V., et al., A Modern Review on Jet Impingement Heat Transfer Methods, J. Heat Trans-T ASME, 143 (2021), 064001
  6. Liu, K., et al., A Novel Multi-Stage Impingement Cooling Scheme -Part II: Design Optimization, J. Turbomach, 142 (2020), 121009
  7. Xu, L., et al., Numerical Simulation of Swirling Impinging Jet Issuing from a Threaded Hole under Inclined Condition, Entropy, 22 (2019), 1, 15
  8. Oliveira, A. V. S., et al., Experimental Study of the Heat Transfer of Single-Jet Impingement Cooling on a Large Heated Plate Near Industrial Conditions, Int. J. Heat Mass Trans., 184 (2022), 121998
  9. Salem, A. R., et al., Experimental and Numerical Study of Jet Impingement Cooling for Improved Gas Turbine Blade Internal Cooling With in-Line and Staggered Nozzle Arrays, J. Energ. Resour-ASME, 143 (2021), 012103
  10. Plant, R. D., et al., A Review of Jet Impingement Cooling, International Journal of Thermofluids, 17 (2023), 100312
  11. Pawar, S., et al., The Impingement Heat Transfer Data Of Inclined Jet in Cooling Applications: A Review, J. Thermal Science, 29 (2019), Dec., pp. 1-12
  12. Singh, P., et al., Study of Flow Field and Heat Transfer Characteristics for an Interacting Pair of Counter-Rotating Dual-Swirling Impinging Flames, Int. J. Therm. Sci., 144 (2019), Oct., pp. 191-211
  13. Yang, T., et al., Comparative Study on Flow and Heat Transfer Characteristics of Swirling Impingement Jet Issuing From Different Nozzles, Int. J. Therm. Sci., 184 (2023), 107914
  14. Nourin, F. N., et al., Review of Gas Turbine Internal Cooling Improvement Technology, J. Energ. Resour-ASME, 143 (2021), 080801
  15. Tepe, A. U., et al., Experimental and Numerical Investigation of Jet Impingement Cooling Using Extended Jet Holes, Int. J. Heat Mass Trans., 158 (2020), 119945
  16. Zhou, J., et al., Numerical Investigation on Flow and Heat Transfer Characteristics of Single Row Jet Impingement Cooling with Varying Jet Diameter, Int. J. Therm. Sci., 179 (2022), 107710
  17. Marzec, K., et al., Heat Transfer Characteristic of an Impingement Cooling System with Different Nozzle Geometry, Journal of Physics: Conference Series, 530 (2014), 012038
  18. Shuja, S. Z., et al., Jet Impingement on a Tapered Hole: Influence of Jet Velocity and Hole Wall Velocities on Heat Transfer and Skin Friction, Int. J. Numer. Meth. Fluids, 60 (2009), 9, pp. 972-991
  19. Carcasci, C., et al., Experimental Investigation of a Leading Edge Cooling System with Optimized Inclined Racetrack Holes, Turbo Expo: Power for Land, Sea, and Air, American Society of Mechanical Engineers, 45714 (2014), V05AT12A034
  20. Ram, C., et al., Computational Study of Leading Edge Jet Impingement Cooling with a Conical Converging Hole for Blade Cooling, ARPN J. Eng. Appl. Sci., 12 (2017), 22, pp. 6397-6406
  21. Sivamani, S., et al., Numerical Analysis of Jet Impingement Cooling Using Converging Conical Hole for Blade Leading Edge, Gas Turbine India Conference, American Society of Mechanical Engineers, 58509 (2017),V001T03A009
  22. Sathish, S., et al., Influence of Converging Conical Hole Angles on Jet Impingement Blade Cooling of Gas Turbine Blade Leading Edge, AIP Conference Proceedings, 2385 (2022), 120003
  23. Zielinski, A. J., et al., Impingement Cooling Using a Variable-Diameter Synthetic Jet, Proceedings, 17th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), IEEE, San Diego, Cal., USA, 2018, Vol. 17, pp. 429-435
  24. Zielinski A. J., et al., Flow Analysis of the Impingement of a Variable-Diameter Synthetic Jet, J. Flow Vis. Image Pro., 26 (2019), 2, pp. 127-148
  25. Chi, Z., et al., Geometrical Optimization of Non-Uniform Impingement Cooling Structure with Variable-Diameter Jet Holes, Int. J. Heat Mass Trans., 108 (2017), Part A, pp. 549-560
  26. Xu, L., et al., Flow and Heat Transfer Characteristics of a Swirling Impinging Jet Issuing from a Threaded Nozzle, Case Stud. Therm. Eng., 25 (2021), 100970
  27. He, J., et al., Heat Transfer Enhancement of Impingement Cooling by Different Crossflow Diverters, J. Heat Trans-T ASME, 144 (2022), 4, 042001
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Study on flow and heat transfer performance of single jet impingement cooling through variable-diameter hole

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence