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Experimental investigation of wing-in-ground effect with a NACA6409 section

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Abstract

The aerodynamic characteristics of NACA6409 in the vicinity of the ground were experimentally studied in a wind tunnel. Lift and drag forces, the pitching moment, and the center of pressure were measured with respect to various major aerodynamic parameters, such as the ground clearance, the angle of attack, the aspect ratio (AR), and the endplate type, which resulted in a total number of 420 conditions. In addition, a smoke trace test was conducted to visualize the flow pattern around NACA6409 in the vicinity of the ground. As a result of the ground effect and the influence of the endplate, the lift-to-drag ratio increased at low ground clearance and the center of pressure moved forward to the leading edge; that is, the endplate and ground effects were equivalent to the aerodynamic advantage that results from increasing the AR of the wing. Extended experimental results are useful for understanding the aerodynamic characteristics influenced by each aerodynamic parameter during ground effect as well as for verifying numerical simulation.

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Acknowledgments

This work was supported by the Advanced Shipbuilding Engineering Research Center (ASERC) and by a grant from the Korea Science and Engineering Foundation (KOSEF).

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Authors and Affiliations

  1. Department of Naval Architecture and Ocean Engineering, Dong-Eui University, Pusan, Korea

    Kwang Hyo Jung

  2. Department of Naval Architecture and Ocean Engineering, Pusan National University, Pusan, Korea

    Ho Hwan Chun & Hee Jung Kim

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  1. Kwang Hyo Jung
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  2. Ho Hwan Chun
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  3. Hee Jung Kim
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Correspondence to Ho Hwan Chun.

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Jung, K.H., Chun, H.H. & Kim, H.J. Experimental investigation of wing-in-ground effect with a NACA6409 section. J Mar Sci Technol 13, 317–327 (2008). https://doi.org/10.1007/s00773-008-0015-4

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  • DOI: https://doi.org/10.1007/s00773-008-0015-4

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