Flapping dynamics of a flexible propulsor near ground

Jaeha Ryu; Sung Goon Park; Boyoung Kim; Hyung Jin Sung

doi:10.1007/s10409-016-0571-5

Flapping dynamics of a flexible propulsor near ground

Jaeha Ryu, Sung Goon Park, Boyoung Kim, Hyung Jin Sung

St. Anthony Falls Laboratory

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

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_tail) and the net thrust (F¯ _x) were influenced by St of the flexible propulsor. The vortical structures in the wake were analyzed for different flapping conditions.

Original language	English (US)
Pages (from-to)	991-1000
Number of pages	10
Journal	Acta Mechanica Sinica/Lixue Xuebao
Volume	32
Issue number	6
DOIs	https://doi.org/10.1007/s10409-016-0571-5
State	Published - Dec 1 2016

Bibliographical note

Funding Information:
This work was supported by the Creative Research Initiatives (Grant 2016-004749) program of the National Research Foundation of Korea (MSIP).

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

Keywords

Flexible propulsor
Ground effect
Immersed boundary method
Mode analysis

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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 (atail) and the net thrust (F¯ x) were influenced by St of the flexible propulsor. The vortical structures in the wake were analyzed for different flapping conditions.",

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Flapping dynamics of a flexible propulsor near ground

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