Experimental Assessment of the Aerodynamics of a Slotted Wavy Blade

Authors

  • Jwan Faleh Jassem Student
  • Mohammed G Al-azawy
  • Radwan M. Aljuhashy

DOI:

https://doi.org/10.31185/ejuow.Vol12.Iss3.577

Keywords:

Slotted blade; Wavy blade; NACA0012 Airfoil; Drag and Lift Forces.

Abstract

Many techniques have been incorporated into the design of turbine blades in an attempt to improve their performance. Assessment is applied to investigate the flow behaviour around NACA 0012 with modifications (slotted and wave slotted airfoil) experimentally. An open subsonic wind tunnel with a test section of (30.5 ×30.5×60 cm) was employed to conduct the test. The work experiment investigated two modified models (slotted and hybrid slotted and wavy) then compared them to the normal blade model. A slotted blade NACA 0012 airfoil model with a slot width of 1.5 mm at 60% of the chord was employed in the current study. All blades exhibited stall between 10o to 12o angles of attack at various wind speeds (10, 15, 20, and 20 m/s). The normal blade showed an earlier stall at angle of attack at 10o. Additionally, the increase in wind speeds showed that the modified models did not exhibit better stall delay than the normal on then better performance than the normal model.

 

References

D. S. Miklosovic, M. M. Murray, L. E. Howle, and F. E. Fish. Leading-edge tubercles delay stall on humpback whale (Megaptera novaeangliae) flippers. Phys. Fluids. 2004, 16, 5, 1–5.

K. Jha, P. Gulati, and U. K. Tripathi. Recent Advances in Sustainable Technologies. 2020.

D. V. N. Bartaria and S. Sharma. Airfoil terminology its theory and variations as well as relations with its operational lift force and drag force in ambient conditions. Int. J. Recent Res. Civ. Mech. Eng. 2015, 2, 1, 268–277.

İ. Göv and M. H. Doğru. Aerodynamic optimization of Naca 0012 Airfoil. Int. J. Energy Eng. Sci. 2020, 2, 146–155.

M. Ramzi and G. AbdErrahmane. Passive control via slotted blading in a compressor cascade at stall condition. J. Appl. Fluid Mech. 2013, 6, 4, 571–580.

M. Asli, B. Mashhadi Gholamali, and A. Mesgarpour Tousi. Numerical analysis of wind turbine airfoil aerodynamic performance with leading-edge bump. Math. Probl. Eng. 2015.

S. Beyhaghi and R. S. Amano. Improvement of aerodynamic performance of cambered airfoils using leading-edge slots. J. Energy Resour. Technol. Trans. ASME. 2017, 139, 5, 1–8.

S. Beyhaghi and R. S. Amano. A parametric study on leading-edge slots used on wind turbine airfoils at various angles of attack. J. Wind Eng. Ind. Aerodyn. 2018, 175, 43–52.

A. Seeni. Aerodynamic performance characterization of slotted propeller: Part B effect of angle. INCAS Bull. 2019, 11, 4, 155–170.

W. M. W. Mohamed, N. P. Ravindran, and P. Rajendran. A CFD simulation on the performance of slotted propeller design for various airfoil configurations. CFD Lett. 2021, 13, 3, 43–57.

H. S. Yoon, P. A. Hung, J. H. Jung, and M. C. Kim. Effect of the wavy leading edge on hydrodynamic characteristics for flow around low aspect ratio wing. Comput. Fluids. 2011, 49, 1, 276–289.

N. Rostamzadeh, K. L. Hansen, R. M. Kelso, and B. B. Dally. The formation mechanism and impact of streamwise vortices on NACA 0021 airfoil’s performance with undulating leading-edge modification. Phys. Fluids. 2014, 26, 10, 1–22.

X. Chang, X. N. Wang, and X. R. Cheng. Research on hydrodynamic performance of three-dimensional airfoil with tubercles on leading-edge. Appl. Mech. Mater. 2014, 575, 405–413.

B. A. R. Al-Bakri and R. M. Aljuhashy. The Aerodynamics of the Wavy Blade Under the Effect of Fluctuated Wind Flow. FME Trans. 2021, 49, 3, 704–710.

Zhang, X.W., Zhou, C. Y., Zhang, T., and Ji,W. Y., “Numerical Study on Effect of Leading Edge Tubercles,” Aircraft Engineering and Aerospace Technology, Vol. 85, No. 4, 2012, pp. 247–257.

Shuling Chen, Yan Liu , Changzhi Han , Shiqiang Yan, and Zhichao Hong “Numerical Investigation of Turbine Blades with Leading-Edge Tubercles in Uniform Current” Water, MDPI, Vol. 13, No. 2205, 2021, pp. 1–17.

R. M. Aljuhashy. Numerical Study For Slotted And Vibrated Asymmetric Aerofoils. Wasit Journal of Engineering Sciences. Vol. 11, No. 3, 2023, pp. 34–44.

Downloads

Published

2024-08-01

Issue

Section

Mechanical Engineering

How to Cite

Faleh Jassem, J., G Al-azawy, M. ., & M. Aljuhashy, R. . (2024). Experimental Assessment of the Aerodynamics of a Slotted Wavy Blade. Wasit Journal of Engineering Sciences, 12(3), 109-119. https://doi.org/10.31185/ejuow.Vol12.Iss3.577