Acta Mechanica Sinica

, Volume 32, Issue 6, pp 991–1000

Flapping dynamics of a flexible propulsor near ground

  • Jaeha Ryu
  • Sung Goon Park
  • Boyoung Kim
  • Hyung Jin Sung
Research Paper

Abstract

The flapping motion of a flexible propulsor near the ground was simulated using the immersed boundary method. The hydrodynamic benefits of the propulsor near the ground were explored by varying the heaving frequency (St) of the leading edge of the flexible propulsor. Propulsion near the ground had some advantages in generating thrust and propelling faster than propulsion away from the ground. The mode analysis and flapping amplitude along the Lagrangian coordinate were examined to analyze the kinematics as a function of the ground proximity (d) and St. The trailing edge amplitude (\(a_\mathrm{tail}\)) and the net thrust (\(\overline{{F}}_x\)) were influenced by St of the flexible propulsor. The vortical structures in the wake were analyzed for different flapping conditions.

Keywords

Flexible propulsor Ground effect Immersed boundary method Mode analysis 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Jaeha Ryu
    • 1
  • Sung Goon Park
    • 1
  • Boyoung Kim
    • 1
  • Hyung Jin Sung
    • 1
  1. 1.Department of Mechanical EngineeringKorea Advanced Institute of Science and TechnologyDaejeonKorea

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