THERMAL SCIENCE
International Scientific Journal
NUMERICAL STUDY OF HEAT TRANSFER ENHANCEMENT DUE TO THE USE OF FRACTAL-SHAPED DESIGN FOR IMPINGEMENT COOLING
ABSTRACT
This paper describes a numerical analysis of a heat transfer enhancement technique that introduces fractal-shaped design for impingement cooling. Based on the gas turbine combustion chamber cooling, a fractal-shaped nozzle is designed for the constant flow area in a single impingement cooling model. The incompressible Reynolds-averaged Navier-Stokes equations are applied to the system using CFD software. The numerical results are compared with the experiment results for array impingement cooling.
KEYWORDS
PAPER SUBMITTED: 2017-03-08
PAPER REVISED: 2017-04-25
PAPER ACCEPTED: 2017-05-08
PUBLISHED ONLINE: 2017-12-02
THERMAL SCIENCE YEAR
2017, VOLUME
21, ISSUE
Supplement 1, PAGES [S33 - S38]
- Womac, D. J., et al., Correlating Equations for Impingement Cooling of Small Heat Sources with Single Circular Liquid Jets, Journal of Heat Transfer, 115 (1993), 1, pp. 106-115
- Facchini, B., et al., Impingement Cooling for Modern Combustors: Experimental Analysis of Heat Transfer and Effectiveness. Experiments in Fluids, 40 (2006), 4, pp. 601-611
- Liu, S., et al., Distribution of Primary Additional Errors in Fractal Encoding Method, Multimedia Tools and Applications, 76 (2017), 4, pp. 5787-5802
- Liu, S., et al., Fractal Generation Method Based on Asymptote Family of Generalized Mandelbrot Set and Its Application, Journal of Nonlinear Science and Applications, 10 (2017), 3, pp. 1148-1161
- Geipel, P., et al., Fractal-Generated Turbulence in Opposed Jet Flows, Flow, Turbulence, Combustion, 85 (2010), 3, pp. 397-419
- Elsaey, A., et al., CFD Simulation of Fractal-Shaped Orifices for Flow Measurement Improvement, Flow Measurement and Instrumentation, 36 (2014), Apr., pp. 14-23
- Cafiero, G., et al., Heat Transfer Enhancement of Impinging Jets with Fractal-Generated Turbulence, International Journal of Heat and Mass Transfer, 75 (2014), Aug., pp.173-183
- Rhee, D. H., et al., Local Heat/Mass Transfer and Flow Characteristics of Array Impinging Jets with Effusion Holes Ejecting Spent Air, International Journal of Heat and Mass Transfer, 46 (2003), 6, pp. 1049-1061