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A Flow Field Study of a Film Cooling Hole Featuring an Orifice

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A Flow Field Study of a Film Cooling Hole Featuring an Orifice

Zheng, Yingjie (2013) A Flow Field Study of a Film Cooling Hole Featuring an Orifice. Masters thesis, Concordia University.

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Abstract

Film cooling is a jet-in-crossflow application in gas turbines used to protect high temperature parts. Understanding the physical phenomena in the flow field, for example the detrimental counter-rotating vortex pair, is highly critical. Experimental investigations were conducted using stereoscopic PIV to study the flow field downstream from film cooling holes featuring an orifice, under blowing ratios from 0.5 to 2.0. The original geometry of a short injection hole that was proposed in a previous numerical study was examined. The results reported a significant reduction in counter-rotating vortex pair strength of nozzle hole injection in comparison with cylindrical hole injection. The streamwise vorticity of the nozzle hole jet averaged a drop of 55% at a low blowing ratio of 0.5, and a 30%–40% drop at high blowing ratios of 1.0, 1.5 and 2.0. Due to the reduction in counter-rotating vortex pair strength, a round jet bulk was observed forming from the two legs of a typical kidney-shaped jet. The merged jet bulk delivered better coverage over the surface.
The effect of the geometrical parameters of the orifice and the effect of the blowing ratio were also investigated using long injection hole geometry to isolate the impact of the short hole length. It was found that under high blowing ratio conditions, no structural difference occurred in the jet when altering the value of blowing ratio. The most important geometrical parameters were the opening width and the in-hole position of the orifice. The measurement results suggested that the width of the orifice had a major impact on downstream counter-rotating vortex pair strength, and the in-hole position of the orifice mainly affected the penetration characteristics of the jet. The mechanism of the counter-rotating vortex suppressing effect of the orifice was studied from the flow field data. It is proven that the orifice greatly eliminated the hanging vortices developing from the in-hole boundary layer vorticity, which was the major contributor to counter-rotating vortex formation in inclined jets.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Thesis (Masters)
Authors:Zheng, Yingjie
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical Engineering
Date:13 December 2013
Thesis Supervisor(s):Hassan, Ibrahim
ID Code:978113
Deposited By: YINGJIE ZHENG
Deposited On:19 Jun 2014 20:26
Last Modified:18 Jan 2018 17:46

References:

Aga, V. and Abhari, R. S., Influence of Flow Structure on Compound Angled Film Cooling Effectiveness and Heat Transfer, J. Turbomach., 133:031029 (12 pp.), 2011.
Aga, V., Rose, M. and Abhari, R. S., Experimental flow structure investigation of compound angled film cooling, J. Turbomach., 130:031005-1-8, 2008.
An, B., Liu, J., Zhang, C. and Zhou, S., Film cooling of cylindrical hole with a downstream short crescent-shaped block, J. Heat Transfer, 135:031702 (9 pp.), 2013.
Asghar, F. H. and Hyder, M. J., Computational study of film cooling from single and two staggered rows of novel semi-circular cooling holes including coolant plenum, Energy Conversion and Management, 52:329-334, 2011.
Azzi, A., Abidat, M., Jubran, B. A. and Theodoridis, G.S., Film cooling predictions of simple and compound angle injection from one and two staggered rows, Numerical Heat Transfer, 40:273-94, 2001.
Azzi, A. and Jubran, B. A., Numerical modelling of film cooling from converging slot-hole, Heat and Mass Transfer, 43:381-8, 2007.
Bernsdorf, S., Rose, M. G. and Abhari, R. S., Experimental validation of quasisteady assumption modeling of unsteady film-cooling, J. Turbomach., 130:2008.
Brittingham, R. A. and Leylek, J. H., A detailed analysis of film cooling physics: Part IV- Compound-angle injection with shaped holes, J. Turbomach., 122:133-145, 2000.
Bruce-Black, J., Davidson, F. T., Bogard, D. G. and Johns, D. R., Practical slot configurations for turbine film cooling applications, 2009 ASME Turbo Expo, June 8, 2009 - June 12, 3:607,Orlando, FL, United states, 2009.
Bunker, R. S., A review of shaped hole turbine film-cooling technology, J. Heat Transfer, 127:441-453, 2005.
Dai, K. Y., Liu, G. R., Lim, K. M. and Gu, Y. T., Comparison between the Radial Point Interpolation and the Kriging Interpolation Used in Meshfree Methods, Comput.Mech., 32:60-70, 2003.
Dhungel, A., Lu, Y., Phillips, W., Ekkad, S. V. and Heidmann, J., Film cooling from a row of holes supplemented with antivortex holes, J. Turbomach., 131:1-10, 2009.
Elnady, T., Hassan, I., Kadem, L. and Lucas, T., Cooling effectiveness of shaped film holes for leading edge, Exp.Therm.Fluid Sci., 44:649-661, 2013.
Farhadi-Azar, R., Ramezanizadeh, M., Taeibi-Rahni, M. and Salimi, M., Compound triple jets film cooling improvements via velocity and density ratios: Large eddy simulation, J Fluids Eng- Trans ASME, 133:031202 (13 pp.), 2011.
Fric, T. F. and Roshko, A., Vortical structure in the wake of a transverse jet, J. Fluid Mech., 279:1-47, 1994.
Ghorab, M. G., Hassan, I. G. and Lucas, T., An experimental investigation of film cooling performance of louver scheme, Int. J. Heat Mass Transfer, 54:1387-1399, 2011.
Graf, L. and Kleiser, L., Flow-field analysis of anti-kidney vortex film cooling, J. Thermal Science, 21:66-76, 2012.
Graf, L. and Kleiser, L., Large-Eddy Simulation of double-row compound-angle film cooling: Setup and validation, Computers and Fluids, 43:58-67, 2011.
Hada, S., Tsukagoshi, K., Masada, J. and Ito, E., Test Results of the World’s First 1,600C J-series Gas Turbine, Mitsubishi Heavy Industries Technical Review, 49:18-23, 2012.
Haller, G., An objective definition of a vortex, J. Fluid Mech., 525:1-26, 2005.
Haven, B.A. and Kurosaka, M., Kidney and anti-kidney vortices in crossflow jets, J. Fluid Mech., 352:27-64, 1997.
Heidmann, J. D., A numerical study of anti-vortex film cooling designs at high blowing ratio, Proc. ASME Turbo Expo, 4:789, Germany, 2008.
Heidmann, J. D. and Ekkad, S., A novel antivortex turbine film-cooling hole concept, J. Turbomach., 130:1-9, 2008.
Hyams, D. G. and Leylek, J. H., A detailed analysis of film cooling physics: Part III- Streamwise injection with shaped holes, J. Turbomach., 122:122-132, 2000.
Hyung, H. C., Rhee, D. H. and Kim, B.G., Enhancement of film cooling performance using a shaped film cooling hole with compound angle injection, Fluids and Thermal Engineering, 44:99-110, 2001.
Issakhanian, E., Elkins, C. J. and Eaton, J. K., In-hole and mainflow velocity measurements of low-momentum jets in crossflow emanating from short holes, Exp.Fluids, 53:1765-1778, 2012.
Kampe, T. A. D., Volker, S., Samel, T., Heneka, C., Ladisch, H., Schulz, A. and Bauer, H., Experimental and Numerical Investigation of Flow Field and Downstream Surface Temperatures of Cylindrical and Diffuser Shaped Film Cooling Holes, J. Turbomach., 135:011026 (10 pp.), 2013.
Kelso, R. M., Lim, T. T. and Perry, A. E., An experimental study of round jets in cross-flow, J. of Fluid Mech., 306:111-44, 1996.
Kusterer, K., Bohn, D., Sugimoto, T. and Tanaka, R., Double-jet ejection of cooling air for improved film cooling, J. Turbomach., 129:809-815, 2007.
Li, H., Hassan, O. and Hassan, I., The Effects of Counter-rotating Vortex Pairs' Intensity on Film Cooling Effectiveness, Proc. of the ASME IMECE, Energy and Water Scarcity, Denver, CO, USA, 2011.
Ligrani, P. M., Wigle, J. M., Ciriello, S. and Jackson, S. M., Film-cooling from holes with compound angle orientations. Part 1. Results downstream of two staggered rows of holes with 3d spanwise spacing, J. Heat Transfer, 116:341-352, 1994a.
Ligrani, P. M., Wigle, J. M. and Jackson, S. W., Film-cooling from holes with compound angle orientations. Part 2. Results downstream of a single row of holes with 6d spanwise spacing, J. Heat Transfer, 116:353-362, 1994b.
Liu, C., Zhu, H., Bai, J. and Xu, D., Film cooling performance of converging slot-hole rows on a gas turbine blade, Int. J. Heat Mass Transfer, 53:5232-41, 2010.
Marzouk, Y. M. and Ghoniem, A. F., Vorticity structure and evolution in a transverse jet, J.Fluid Mech., 575:267-305, 2007.
Miao, J. and Wu, C., Numerical approach to hole shape effect on film cooling effectiveness over flat plate including internal impingement cooling chamber, Int. J. Heat Mass Transfer, 49:919-938, 2006.
Oldfield, M. L. G. and Lock, G. D., UK patent 9821639.3,. Coolant Passages for Gas Turbine Components, 1998.
Porter, J. S., Sargison, J. E., Walker, G. J. and Henderson, A. D., A comparative investigation of round and fan-shaped cooling hole near flow fields, J. Turbomach., 130:2008.
Raffel, M., Willert, C. and Kompenhans, J. 2002, Particle Image Velocimetry - A Praticle Guide, Springer, p.22.
Recker, E., Bosschaerts, W., Wagemakers, R., Hendrick, P., Funke, H. and Börner, S., Experimental study of a round jet in cross-flow at low momentum ratio, 15th Int Symp on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 2010.
Sargison, J. E., Guo, S. M., Oldfield, M. L. G., Lock, G. D. and Rawlinson, A. J., A converging slot-hole film-cooling geometry-Part 1: Low-speed flat-plate heat transfer and loss, J. Turbomach., 124:453-460, 2002.
Sargison, J. E., Oldfield, M.L.G., Guo, S. M., Lock, G. D. and Rawlinson, A.J., Flow visualisation of the external flow from a converging slot-hole film-cooling geometry, Experiments in Fluids, 38:304-318, 2005.
Schlegel, F., Wee, D., Marzouk, Y. M. and Ghoniem, A. F., Contributions of the wall boundary layer to the formation of the counter-rotating vortex pair in transverse jets, J. Fluid Mech., 676:461-490, 2011.
Shinn, A. F. and Pratap Vanka, S., Large eddy simulations of film-cooling flows with a micro-ramp vortex generator, J. Turbomach., 135:011004 (13 pp.), 2013.
Walters, D. K. and Leylek, J. H., A detailed analysis of film-cooling physics: Part I-Streamwise injection with cylindrical holes, J. Turbomach., 122:102-112, 2000.
Westerweel, J., Dabiri, D. and Gharib, M., Effect of a Discrete Window Offset on the Accuracy of Cross-correlation Analysis of Digital PIV Recordings, Exp. Fluids, 23:20-28, 1997.
Wilcock, R. C., Young, J. B. and Horlock, J. H., The effect of turbine blade cooling on the cycle efficiency of gas turbine power cycles, J. Eng. Gas. Turb. Power, 127:109-120, 2005.
Zaman, K. B. M. Q., Rigby, D. L. and Heidmann, J. D., Experimental study of an inclined jet-in-cross-flow interacting with a vortex generator, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, FL, USA, 2010.
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