Effect of Gurney flap Height and Mounting Position on the Performance of a Centrifugal Fan

Document Type : Regular Article

Authors

Turbomachines Laboratory, Department of Mechanical Engineering Indian Institute of Technology, Chennai – 600036, India

Abstract

The effect of Gurney flap height and mounting position on the head coefficient of a centrifugal fan at different Reynolds numbers is investigated experimentally. Quarter round Gurney flap of 1.0, 1.5, 2.0 and 2.5 mm height is mounted at three different positions, S=1.00 (impeller tip), S=0.95 and S=0.90 on the pressure surface of the impeller blade tip. Performance tests are carried out on the centrifugal fan at five Reynolds numbers corresponding to five rotational speeds of 1100, 1500, 2000, 2500 and 2900 rpm respectively. From the performance curves it is found that the fan head coefficient increases significantly with Gurney flaps at low Reynolds numbers and increases marginally at high Reynolds numbers. Effect of Reynolds number on the head coefficient is considerable for the baseline fan and found to be negligible for the fan with Gurney flaps, for all combinations of Gurney flap mounting position and height. The head coefficient of the fan improves as Gurney flap height increases but the improvement is marginal after certain height of Gurney flap. The head coefficient of the fan deteriorates when Gurney flap is mounted away from the impeller blade tip.

Keywords


Bao, N., H. Ma and Z. Ye (2000) Experimental study of wind turbine blade power augmentation using airfoil flaps, including the Gurney flap. Wind Engineering 24, 25–34.##
Brown, L. and A. Filippone (2003). Aerofoil at low speeds with Gurney flap. The Aeronautical Journal 107 (1075), 539-546.##
Byerley, A. R., O. Störmer, J. W. Baughn, T. W. Simon, K. W. Van Treuren and J. List (2003). Using Gurney flaps to Control Laminar Separation on Linear Cascade Blades. ASME Journal of Turbomachinery 125 (1), 114–120.##
Casey, M. V. and C. J. Robinson (2011). A unified correction method for Reynolds number, size and roughness effects on the performance of compressors. Proc. Inst. Mech. Engineers, 225 Part A: J. Power and Energy, 864-876.##
Chakroun, Y. and G. Bangga (2021). Aerodynamic Characteristics of Airfoil and Vertical Axis Wind Turbine Employed with Gurney flaps. Sustainability 13, 4284, 22.##
Chen, P. H., W. Y. Qiao and H. L. Luo (2010). Investigation of low solidity LP turbine cascade with flow control: Part 2–Passive flow control using Gurney flap. ASME Paper GT2010-22330.##
Chen, L., H. Xie, J. Xu, R. Dai and J. Chen (2018). Experimental and numerical study on the performance of an axial fan with a Gurney flap. Advances in Mechanical Engineering 10(10), 1-17.##
Cole, J., B. Vieira, J. Coder, A. Premi and M. Maughmer (2013). Experimental investigation into the effect of Gurney flaps on various airfoils. Journal of Aircraft 50(4), 1287-1294.##
Dundi, T. M. K., N. Sitaram and M. Suresh (2012). Application of Gurney flaps on a Centrifugal Fan Impeller, Paper O12008S. International Journal of Fluid Machinery and Systems 5(2), 65-71.##
Gai, S. L. and R. Palfrey (2003). Influence of trailing-edge flow control on airfoil performance. Journal of Aircraft 40(2), 332–337.##
Giguere, P., G. Dumas and J. Lemay (1997). Gurney flap scaling for optimum lift-to-drag ratio. Journal of Aircraft 35(12), 1888–1890.##
Greenblatt, D. (2011). Application of Large Gurney flaps on Low Reynolds Number Fan Blades. ASME Journal of Fluids Engineering 133, 021102-1 to 021102-7.##
Graham, M., M. Adrian and L. W. Traub (2018). Experimental Study on the Effect of Gurney flap Thickness on Airfoil Performance. Journal of Aircraft 55(2), 897-902.##
Jain, S., N. Sitaram and S. Krishnaswamy (2015). Computational investigations on the effects of Gurney flap on airfoil aerodynamics. International Scholarly Research Notices, Volume 2015, Article ID 402358, 11 pages.##
Janus, J. M. (2000). Analysis of Industrial Fan Designs with Gurney flaps. AIAA Paper 2000-983.##
Kim, M. J., S. M. Jang, J. H. Kim and S. J. Song (2013). Effect of Gurney flaps on radial fan blades - Mechanisms of performance enhancement. Paper ID: AICFM12-000125, The 12th Asian International Conference on Fluid Machinery, Yogyakarta, Indonesia.##
Kim, M. J., S. M. Jang, S. H. Son and S. J. Song (2014). Effect of Gurney flaps on Performance of a Radial Fan. Paper ID: ACGT2014-0134, Asian Congress on Gas Turbines, Seoul, Korea.##
Lee, T. (2009). Aerodynamic Characteristics of Airfoil with Perforated Gurney-Type Flaps. Journal of Aircraft 46(2), 542-548.##
Li, Y. C., J. J. Wang and P. F. Zhang (2002). Effect of Gurney flaps on a NACA0012 airfoil. Flow Turbulence and Combustion 68, 27–39.##
Li, Y. C., J. J. Wang and P. F. Zhang (2003). Influences of mounting angles and locations on the effects of Gurney flaps. Journal of Aircraft 40(3), 494-498.##
Liebeck, R. H. (1978). Design of subsonic airfoils for high lift, Journal of Aircraft 15(9), 547–561.##
Maughmer, M. D. and G. Bramesfeld (2008). Experimental Investigation of Gurney flaps. Journal of Aircraft 45(6), 2062-2067.##
Mudassir, Ahmed, M. R. and Q. H. Nagpurwala (2016). Performance enhancement of a transonic axial compressor stage with Gurney flaps at rotor blade trailing end. Paper ACGT2016-004, Proc. of the Asian Congress on Gas Turbines, Mumbai, India.##
Mudassir, Ahmed, M. R. and Q. H. Nagpurwala (2018). Effect of Chordwise Location of Full Span Gurney flap on Aerodynamic Performance of a Transonic Axial Compressor Rotor. Proc. of 20th Annual CFD Symposium, Bengaluru, India.##
Mudassir, Ahmed, M. R., Q. H. Nagpurwala and S. Subbaramu (2014). Numerical studies on the effect of Gurney flap on aerodynamic performance and stall margin of a transonic axial compressor rotor. Paper No. GTINDIA2014-8130, Proc. of ASME Gas Turbine India Conference, New Delhi, India.##
Myose, R. Y., J. C. Lietsche, D. Scholz, H. Zinge, S. Hayashibara and I. Heron (1996). Flow Visualization Study on the Effect of a Gurney flap in a Low Reynolds Number Compressor Cascade. AIAA Paper 2006-7809.##
Syawitri, T. P., Y. F. Yao, J. Yao and B. Chandra (2020). The effect of Gurney flap on flow characteristics of vertical axis wind turbine. International Journal of Modern Physics B, 34 (14-16) 2040107, 5 pp.##
Son S., J. Kim and M. Kim (2017). Centrifugal fan and air conditioner using the same. US Patent No. 9,611,860.##
Suresh, M. and N. Sitaram (2014). Effect of Gurney Flap Height on the Performance of a Centrifugal Fan, Paper ID: NCETET-208, National Conference on Emerging Trends in Engineering & Technology, Rajasthan, India.##
Suresh, M. and N. Sitaram (2019). Effect of Gurney Flap Configuration on the Performance of a Centrifugal Fan. Journal of Applied Fluid Mechanics 12(2), 565-571.##
Tamagawa, T. and Y. Yoshida (2006). Centrifugal Fan, Cooling Mechanism and Apparatus Furnished with the Cooling Mechanism. US Patent No. US20060056964A9.##
Tatpatti, G., N. Sitaram and K. Viswanath (2021). Computational and experimental investigations of separation control of LP turbine cascade blades using Gurney flaps. Journal of Applied Fluid Mechanics 14(3), 779-792.##
Tiainen, J. (2018). Losses in low Reynolds number centrifugal compressors. Ph. D. Thesis, Lappeenranta University of Technology, Finland.##
Traub, L. W. (2017). Effect of Gurney flaps on an Elliptical Airfoil. ASME Journal of Fluids Engineering 139, 101102-1 to 101102-9.##
Traub, L. W., A. C. Miller and O. Rediniotis (2006). Preliminary Parametric Study of Gurney-Flap Dependencies. Journal of Aircraft 43(4), 1242-1244.##
Troolin, D. R., E. K. Longmire and W. T. Lai (2006). Time resolved PIV analysis of flow over a NACA0015 airfoil with Gurney flap Experiments in Fluids 41(2), 241–254.##
Ueno, S. (2010). Investigation of a Plasma Gurney flap for Lift Enhancement, MASc Thesis, Montreal University, Canada.##
Wang, J. J., Y. C. Li and K.-S. Choi (2008). Gurney flap: Lift Enhancement, Mechanisms and Applications. Progress in Aerospace Sciences 44, 22–47.##
Zhang, Ye, V. Ramdoss, Z. Saleem,  X. Wang, G. Schepers and C. Ferreira  (2019). Effects of root Gurney flaps on the aerodynamic performance of a horizontal axis wind turbine. Energy 187, 115955, 12 pp.##