A Comparison of Circular and Slotted Synthetic Jets for Flow Control in a Twin Air Intake
The performance of an aircraft engine depends on air flow quality at the engine face / the exit of the air-intake also known as aerodynamic inlet plane (AIP). A single-engine aircraft has complex Y-shaped twin air-intake which causes severe flow separation, distortion and flow non-uniformity at the AIP. The present study compares the efficacy of slotted synthetic jet and a row of four circular synthetic jets attached to inner faces of a twin air-intake to improve aerodynamic performance at the AIP. The results are obtained using computational fluid dynamics. The velocity and vorticity plots show that lateral spread of the circular jets is limited as compared to the slotted jet. The circular jets are found to be weak as compared to slotted jet to prevent separation of main flow occurring in the twin air-intake. The various aerodynamic performance parameters, such as static pressure recovery coefficient, total pressure loss coefficient, distortion coefficient and secondary flow uniformity are compared for both the cases, exhibiting marked improvement in all these parameters. The study demonstrates that the slotted synthetic jets is a better option for controlling flow in twin air-intake as compared to a row of circular synthetic jets.
Mayer, D.W.; Anderson, B.H. & Johnson, T. A. 3D subsonic diffuser design and analysis, Am. Inst. Aeronautics Astronautics, AIAA 98-3418, 1998. https://doi.org/10.2514/6.1998-3418
MacMartin, D.G.; Verma, A.; Murray, R.M. & Paduano, J. D. Active control of integrated inlet/compression systems. In Proceedings of ASME FEDSM 2001: ASME Fluids Engineering Division Summer Meeting New Orleans, Louisiana, 2001.
Gad-el-Hak, M. Flow control: Passive, active and reactive flow management. Cambridge University Press, 2000.
Abdellatif, O.E. Experimental study of turbulent flow characteristics inside a rectangular S-shaped diffusing duct. Am. Inst. Aeronautics Astronautics, AIAA 2006-1501, 2006. https://doi.org/10.2514/6.2006-1501
Paul, A.R.; Joshi, S.; Jindal, A.; Maurya, S.P. & Jain, A. Experimental studies of active and passive flow control techniques applied in a twin air-intake. Sci. World J., 2013, 1-8. https://doi.org/10.1155/2013/523759
Keerthi, M.C. & Kushari, A. Effectiveness of vortex generator jets and wall suction on separated flows in serpentine-duct diffuser. Aerospace Sci. Technol., 2014, 34(1), 12-19. https://doi.org/10.1016/j.ast.2014.01.013.
Seddon, J.M. & Goldsmith, E.L. Intake Aerodynamics, AIAA Education series, Wiley Blackwell, 1998.
Smith, B.L. & Glezer, A. The formation and evolution of synthetic jets. Physics Fluids, 1998, 10(9), 2281-2297. https://doi.org/10.1063/1.869828
Guo, D. & Kral, L.D. Numerical simulation of the interaction of adjacent synthetic jet actuators, AIAA paper 2000-2565, 2000. https://doi.org/10.1007/978-3-642-59334-5_114.
Watson, M.; Jaworski A. J. & Wood N. J. Contribution to the understanding of flow interactions between multiple synthetic jets, AIAA J., 2003, 41(4), 747–749. https://doi.org/10.2514/2.2008
Watson M.; Jaworski A. J. & Wood N. J. A study of synthetic jets from rectangular and dual-circular orifices. Aeronautical Journal, 2003, 107(3), 427–434. https://doi.org/10.1017/S000192400001335X.
Mathis, R.; Duke, D.; Kitsios, V. & Soria, J. Flow control in S-shaped air-intake using zero-net-mass-flow. In 16th Australasian Fluid Mechanics Conference, Australia, 2007.
Utturkar, Y.; Mittal, R.; Rampunggoon, P. & Cattafesta, L. Sensitivity of synthetic jets to the design of the jet cavity. In 40th AIAA Aerospace Sciences and Exhibit 0124, 2002. https://doi.org/10.2514/6.2002-124.
Kumar, A. Flow control optimization in a jet engine serpentine inlet duct, Texas A&M University, 2007. (Master thesis).
Guoqing, Z. & Qijun, Z. Parametric analyses for synthetic jet control on separation and stall over rotor airfoil. Chinese J. Aeronautics, 2014, 27(5), 1051-1061. https://doi.org/10.1016/j.cja.2014.03.023.
Oren, L.; Gutmark, E.; Muragappan, S. & Khosla, S. Flow characteristics of non circular synthetic jets. In 47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2009, Orlando, Florida, 2009, 1309. https://doi.org/10.2514/6.2009-1309.
Leschziner, M.A. & Lardeau, S. Simulation of slot and circular synthetic jets in the context of boundary-layer separation control. Philosophical Trans. Royal Society- A, 2011,369, 1495–1512. https://doi.org/10.1098/rsta.2010.0363
Chen, Z.J. & Wang, J.J. Numerical investigation on synthetic jet flow control inside an S-inlet duct. Sci. China Technol. Sci., 2012, 55(9), 2578–2584. https://doi.org/10.1007/s11431-012-4970-y.
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