Free-stream characteristics of bio-inspired marine rudders with different leading-edge configurations

Computational Aerodynamics Analysis of Non-Symmetric Multi-Element Wing in Ground Effect with Humpback Whale Flipper Tubercles

“…This testifies to the chaotic character of the recirculations created by the tubercles. This phenomenon was already observed by Srinivras [18] (See Figure 25 of [18]). Looking at the shear stress lines in Figure 12c, two secondary surface vortices can be seen, near the trailing edge of the main element.…”

“…In the studies of Miklosovic [8,14], Hansen [11], Van Nierop [15], or Pedro [17], the configuration of the wing was always sinusoidal, with a constant wavelength and amplitude. However, humpback whale flippers are made of 11 tubercles, which do not have a constant inter-tubercle distance or tubercle chord, as shown in Figure 1 and by the observations of Fish and Srinivras [7,9,18]. During their experiments in 2018, Srinivras demonstrated that a bio-mimicked distribution is more effective than a sinusoidal one, as it produces more lift and less drag.…”

“…During their experiments in 2018, Srinivras demonstrated that a bio-mimicked distribution is more effective than a sinusoidal one, as it produces more lift and less drag. This is because the drag-to-lift enhancement comes from the biggest tubercles amplitude and position, the first and fourth [18]. Such models have only been tested for hydrodynamic purpose and only experimentally [18].…”

“…This is because the drag-to-lift enhancement comes from the biggest tubercles amplitude and position, the first and fourth [18]. Such models have only been tested for hydrodynamic purpose and only experimentally [18].…”

Development of Mixed Flow Fans with Bio-Inspired Grooves

“…Nowadays, people have been increasingly realizing the value of strategies animals adopt. These biomimetic ideas have been inspiring researchers and are already applied on airfoils, propellers and even rudders [20][21][22].…”