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Two-Dimensional Numerical Study of the Pulsed Co-Flow Jet

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Abstract—

Two-dimensional flow of the pulsed co-flow jet (CFJ) and the influence of the pulsed parameters on the lift and power consumption are investigated numerically. Firstly, the jet channel of traditional CFJ airfoil is improved. The stall margin is increased by 3° compared with the corresponding traditional CFJ airfoil, and the lift is increased, while the drag is reduced significantly. Then, the influence of the pulsed parameters, such as the pulse waveform, including sinusoidal and rectangular waves, the duty cycle, and the pulse frequency on the lift and power consumption are presented and analyzed in detail. It is concluded that, compared with the steady CFJ, the pulsed CFJ possesses much better ability in suppressing separation and can improve the lift characteristics significantly with limited cost of power consumption. For example, at an angle of attack of 20° flow separation occurs severely, when the steady CFJ is adopted; however, the airflow becomes fully attached on the upper airfoil, when the rectangular pulsed CFJ is employed. As a result, the lift corresponding to the rectangular wave is higher than that of the sinusoidal wave. The results also indicate that the lower duty cycle and pulse frequency can lead to the higher lift but with more power consumption.

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REFERENCES

  1. A. Jirásek, “A vortex generator model and its application to flow control,” AIAA 2004-4965 (2004).

  2. J. C. Lin, S. K. Robinson, and R. J. McGhee, “Separation control on high Reynolds number multi-element airfoils,” AIAA 92-2636 (1992).

  3. K. Yee, W. Joo, and D. H. Lee, “Aerodynamic performance analysis of a Gurney flap for rotorcraft application,” J. Aircraft 44(3), 1003–1014 (2007).

    Article  Google Scholar 

  4. R. Myose, M. Papadakis, and I. Heron, “Gurney flap experiments on airfoils, wings, and reflection plane model,” J. Aircraft 35(2), 206–211 (1998).

    Article  Google Scholar 

  5. D. Jeffrey and X. Zhang, “Aerodynamics of Gurney flaps on a single-element high-lift wing,” J. Aircraft 37(2), 295–301 (2000).

    Article  Google Scholar 

  6. Ö. Savas and D. Coles, “Coherence measurements in synthetic turbulent boundary layers,” J. Fluid Mech, 160, 421–446 (1985).

    Article  ADS  Google Scholar 

  7. R. Holman, Y. Utturkar, R. Mittal, B. L. Smith, and L. Cattafesta, “Formation criterion for synthetic jets,” AIAA J. 43(10), 2110–2116 (2005).

    Article  ADS  Google Scholar 

  8. D. You and P. Moin, “Active control of flow separation over an airfoil using synthetic jets,” J. Fluids Structures 24(8), 1349–1357 (2008).

    Article  ADS  Google Scholar 

  9. T. C. Corke and M. L. Post, “Overview of plasma flow control: concepts, optimization, and applications,” AIAA 2005-563 (2005).

  10. M. Wicks, F. O. Thomas, T. C. Corke, M. Patel, and A. B. Cain, “Mechanism of vorticity generation in plasma streamwise vortex generators,” AIAA J. 53(11), 3404-3413 (2015).

    Article  ADS  Google Scholar 

  11. G. S. Jones and R. J. Englar, “Advances in pneumatic-controlled high-lift systems through pulsed blowing,” AIAA 2003-3411 (2003).

  12. Y. Liu, L. N. Sankar, R. J. Englar, and K. Ahuja, “Numerical simulations of the steady and unsteady aerodynamic characteristics of a circulation control wing airfoil,” AIAA 2001-0704 (2001).

  13. Y. Liu, L. N. Sankar, R. J. Englar, K. Ahuja, and R. Gaeta, “Computational evaluation of the steady and pulsed jet effects on the performance of a circulation control wing section,” AIAA 2004-56 (2004).

  14. G. C. Zha and C. Paxton, “A novel airfoil circulation augment flow control method using co-flow jet,” AIAA 2004-2208 (2004).

  15. B. P. E. Dano, D. Kirk, and G. C. Zha, “Experimental investigation of jet mixing of a co-flow jet airfoil,” AIAA 2010-4421 (2010).

  16. G. C. Zha, B. F. Carroll, C. D. Paxton, C. A. Conley, and A. Wells, “High performance airfoil using co-flow jet flow control,” AIAA 2005-1260 (2005).

  17. Y. C. Yang and G. C. Zha, “Super lift coefficient of cylinder using co-flow jet active flow control,” AIAA 2018-0329 (2018).

  18. J. H. Zhang, K. W. Xu, Y. C. Yang, Y. Ren, P. Patel, and G. C. Zha, “Aircraft control surfaces using co-flow jet active flow control airfoil,” AIAA 2018-3067 (2018).

  19. G. C. Zha, W. Gao, C. D. Paxton, and A. Palewicz, “Numerical investigations of co-flow jet airfoil with and without injection,” AIAA 2006-1061 (2006).

  20. G. C. Zha and W. Gao, “Analysis of jet effects on co-flow jet airfoil performance with integrated propulsion system,” AIAA 2006-0102 (2006).

  21. H. Mitsudharmadi and Y. Cui, “Implementation of co-flow jet concept on low Reynolds number airfoil,” AIAA 2010-4717 (2010).

  22. X. D. Yang, W. R. Jiang, and S. L. Zhang, “Analysis of co-flow jet effect on dynamic stall characteristics applying to rotor airfoils”, IOP Conf. Ser.: Mater. Sci. Eng. 491, 012010 (2019).

  23. H. Y. Xu, C. L. Qiao, and Z. Y. Ye, “Dynamic stall control on the wind turbine airfoil via a co-flow jet,” Energies 9(6), 1–25 (2016).

    Google Scholar 

  24. H. Y. Xu, S. L. Xing, and Z. Y. Ye, “Numerical study of the S809 airfoil aerodynamic performance using a co-flow jet active control concept,” J. Renew. Sustain. Ener. 7(2), 1–20 (2015).

    Google Scholar 

  25. K. W. Xu, J. H. Zhang, and G. C. Zha, “Drag minimization of co-flow jet control surfaces at cruise conditions,” AIAA 2019-1848 (2019).

  26. ANSYS. ANSYS® Fluent Theory Guide, release 15.0 (ANSYS Inc., 2012).

    Google Scholar 

  27. P. R. Spalart and S. R. Allmaras, “A one-equation turbulence model for aerodynamic flows,” AlAA-92-0439 (1992).

  28. N. K. Burgess, R. S. Glasby, J. T. Erwin, D. L. Stefanski, and S. R. Allmaras, “Finite-element solutions to the Reynolds averaged Navier-Stokes equations using a Spalart-Allmaras turbulence model,” AIAA 2017-1224 (2017).

  29. ANSYS. ANSYS® Fluent Customization Manual, release 15.0 (ANSYS Inc., 2012).

    Google Scholar 

  30. Y. C. Yang, M. Fernandez, and G. C. Zha, “Improved delayed detached eddy simulation of super-lift flow of co-flow jet airfoil,” AIAA 2018-0314 (2018).

  31. C. L. Ladson, “Effects of independent variation of Mach and Reynolds numbers on the low-speed aerodynamic characteristics of the NACA 0012 airfoil section,” NASA TM 4074 (1988).

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Funding

This work was partially supported by the National Natural Science Foundation of China (Grant no. 11972306), the Fundamental Research Funds for the Central Universities of China (Grant no. 310201901A004), the Rotor Aerodynamics Key Laboratory Fund (Grant no. RAL20200102-2), and the 111 Project of China (B17037). The authors also acknowledge the computing services from the High Performance Computing Center of Northwestern Polytechnical University.

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Authors and Affiliations

  1. National Key Laboratory of Science and Technology on Aerodynamic Design and Research, Northwestern Polytechnical University, 710072, Xi’an, China

    Yu-Zhe Zhang, He-Yong Xu & Yu-Wei Chu

  2. Rotor Aerodynamics Key Laboratory, China Aerodynamics Research and Development Center, 621000, Mianyang, Sichuan, China

    Yu-Zhe Zhang

  3. Chinese Aeronautical Establishment, 100029, Beijing, China

    Yue Xu

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  1. Yu-Zhe Zhang
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  2. He-Yong Xu
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Correspondence to He-Yong Xu.

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Zhang, YZ., Xu, HY., Chu, YW. et al. Two-Dimensional Numerical Study of the Pulsed Co-Flow Jet. Fluid Dyn 56, 361–370 (2021). https://doi.org/10.1134/S0015462821030137

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