Axial flow over a blunt circular cylinder with and without shear layer reattachment

Handa, Hiroshi; Langen, Pieter van; Sawada, Hideo; Tinney, Charles E.

doi:10.1016/j.jfluidstructs.2006.04.020

Cited by 37 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ideally, the model support should not cause aerodynamic interference (e.g., magneticforce supports 34 ), but the most predominant supports involve sting mounts that are directly in the body's wake. An alternative support, aimed at minimizing the wake-support interference, was utilized by Abramson et al 22,23 and Lambert et al 24 , where a model is supported by thin wires.…”

Section: Technical Backgroundmentioning

confidence: 99%

Aerodynamic Flow Control of a Moving Axisymmetric Bluff Body

Lambert

Vukašinović

Glezer

2014

52nd Aerospace Sciences Meeting

View full text Add to dashboard Cite

The present experiments focus on active fluidic control of the aerodynamic forces and moments of an axisymmetric bluff body platform in time-periodic sinusoidal pitch oscillations at reduced frequencies 0 < k < 0.259. The platform is wire-mounted on a six degree of freedom traverse where each of the eight support wires is individually controlled by a servo motor with an integrated in-line load cell for feedback control of the platform's motion. The aerodynamic forces and moments on the platform are manipulated by controlled interactions of an azimuthal array of synthetic jet actuators on its aft segment with the local cross flow to induce partial (azimuthally-segmented) flow attachment that is coupled with vectoring of its nearwake. The actuation-induced forces and moments can either increase or diminish the corresponding pitchinduced baseline aerodynamic forces and moments. These actuation effects are exploited for open-loop control to suppress or augment the pitch-induced moment, and effect robust (in excess of 50%) control authority over a broad range of oscillation frequencies (up to reduced frequency of 0.259) that are suitable for trajectory stabilization and steering in free-flight.

show abstract

Section: Technical Backgroundmentioning

confidence: 99%

Aerodynamic Flow Control of a Moving Axisymmetric Bluff Body

Lambert

Vukašinović

Glezer

2014

52nd Aerospace Sciences Meeting

View full text Add to dashboard Cite

show abstract

“…The miniature robotic fish has a similar coefficient of drag to that of a sphere (Morrison 2013), ranging between 1.04 and 0.39, for Reynolds number varying from 10 2 to 10 4 . For a cylinder in axial water flow (Higuchi et al 2006) with similar dimensions, but in a higher range of Reynolds number from 6 9 10 4 to 1.8 9 10 5 , the coefficient of drag is *0.84, and is expected to decrease in the presence of a streamlined nose and lower Reynolds number (Hoerner 1965).…”

Section: Estimation Of the Coefficient Of Dragmentioning

confidence: 99%

Design and characterization of a miniature free-swimming robotic fish based on multi-material 3D printing

Phamduy

Vazquez

Kim

et al. 2017

Int J Intell Robot Appl

View full text Add to dashboard Cite

Research in animal behavior is increasingly benefiting from the field of robotics, whereby robots are being continuously integrated in a number of hypothesis-driven studies. A variety of robotic fish have been designed after the morphophysiology of live fish to study social behavior. Of the current design factors limiting the mimicry of live fish, size is a critical drawback, with available robotic fish generally exceeding the size of popular fish species for laboratory experiments. Here, we present the design and testing of a novel free-swimming miniature robotic fish for animal-robot studies. The robotic fish capitalizes on recent advances in multi-material three-dimensional printing that afford the integration of a range of material properties in a single print task. This capability has been leveraged in a novel design of a robotic fish, where waterproofing and kinematic functionalities are incorporated in the robotic fish. Particle image velocimetry is leveraged to systematically examine thrust production, and independent experiments are conducted in a water tunnel to evaluate drag. This information is utilized to aid the study of the forward locomotion of the robotic fish, through reduced-order modeling and experiments. Swimming efficiency and turning maneuverability is demonstrated through target experiments. This robotic fish prototype is envisaged as a tool for animal-robot interaction studies, overcoming size limitations of current design.

show abstract

“…Ideally, the model support should not cause aerodynamic interference (e.g., magnetic-force supports Higuchi et al 1996), but the predominant supports involve sting mounts that are directly in the body's wake. An alternative support, aimed at minimizing the wake-support interference, was utilized by Abramson et al (2011, where a model is supported by thin static wires.…”

Section: Technical Backgroundmentioning

confidence: 99%

Unsteady Aerodynamic Flow Control of Moving Platforms

Glezer¹

2014

View full text Add to dashboard Cite

Axial flow over a blunt circular cylinder with and without shear layer reattachment

Cited by 37 publications

References 12 publications

Aerodynamic Flow Control of a Moving Axisymmetric Bluff Body

Aerodynamic Flow Control of a Moving Axisymmetric Bluff Body

Design and characterization of a miniature free-swimming robotic fish based on multi-material 3D printing

Unsteady Aerodynamic Flow Control of Moving Platforms

Contact Info

Product

Resources

About