Heaving and pitching oscillating foil propulsion in ground effect

Mivehchi, Amin; Dahl, Jason; Licht, Stephen

doi:10.1016/j.jfluidstructs.2016.03.007

Cited by 34 publications

(38 citation statements)

References 26 publications

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“…The general trend of an exponential increases matched that found by Mevihchi et al [4], though the values in this study were significantly higher. Mivehchi found a mean lift of 0.15 at H * = 1.33 which is less than half of the value found in this study.…”

Section: Force Data Measurements Match Pressure Datasupporting

confidence: 87%

“…By creating this foil, it would be possible to test the feasibility of detecting minute changes in flow structures that occur when the environment changes around a oscillating foil with simple pressure sensors. Testing the pressure sensors for detecting a wall in the same ground effect scenario as Mivehchi et al [4], would provide a controlled comparison. This study also used PIV analysis and force data to validate the pressure readings.…”

Section: Statement Of Purposementioning

confidence: 99%

“…A lightweight foil was necessary so that readings on the force sensor would not max out during the dynamic motion experiments. In order to directly compare results to those in the study conducted by Mivehchi et al [4], a NACA 0012 shape and a rigid body was needed. A NACA 00xx shape is defined by Equation 1 and the general profile can be seen in Figure 4 [23].…”

Section: Chapter 2 Foil Design and Constructionmentioning

confidence: 99%

“…Motion files created in a computer next to the tank are loaded into a program called Pewin32Pro2 which communicates and controls the motions of the carriage. Figure 13: Schematic of test tank and foil apparatus [4] The foil was connected to the tank using a clamp that was designed using modeling software and 3D printed with ABS plastic. By using a clamp method, the The extension rod lowered the foil further into the water so that the sensors could be as far into the water as possible, reducing surface effects.…”

Section: Chapter 4 Experimental Apparatusmentioning

confidence: 99%

“…(b) Front view of the foil showing the mean heave position and location of sensors. Images modified from Mivehchi et al[4]…”

mentioning

confidence: 99%

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Development and Testing of a Pressure Sensor Integrated Foil

Stott¹

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Autonomous underwater vehicles are becoming increasingly more prevalent in exploring and studying the bodies of water found all over the world. Having a way to detect and identify the surrounding environment in close range would allow vehicles to move more efficiently and safely through hazardous environments or in groups of many. This study took biological inspiration from the fish sensory organ known as the lateral line to design, fabricate, and test a pressure sensor integrated foil. It examined the ability of pressure sensors to detect flow structures as well

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Section: Force Data Measurements Match Pressure Datasupporting

confidence: 87%

Section: Statement Of Purposementioning

confidence: 99%

Section: Chapter 2 Foil Design and Constructionmentioning

confidence: 99%

Section: Chapter 4 Experimental Apparatusmentioning

confidence: 99%

“…(b) Front view of the foil showing the mean heave position and location of sensors. Images modified from Mivehchi et al[4]…”

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confidence: 99%

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Development and Testing of a Pressure Sensor Integrated Foil

Stott¹

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Aerodynamic Characteristics of Finite Rectangular Wings in Formation Flight with Ground Effect

Shirsath,

Mukherjee

2024

Lecture Notes in Mechanical Engineering

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The ground effect on flapping Bio and NACA 0015 airfoils in power extraction and propulsion regimes

Sarbandi

Naderi

Parhizkar

2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, the heaving and pitching motions of a biologically inspired airfoil (Bio airfoil) and a NACA 0015 airfoil in power extraction ( Po ) and propulsion ( Pr ) operating regimes are numerically simulated considering the ground effect. The effect of the mean distance of the flapping airfoil to the ground surface on the aerodynamic coefficients, Po and Pr efficiency, is investigated. The simulation is done at Reynolds number of 1100, using overset mesh capability of OpenFOAM. Mean distance from airfoil center of rotation to the ground surface varies from 1.25 to 4 times of airfoil's chord length, c. Motion parameters such as heaving and pitching amplitudes and their phase difference are kept constant at 1c, ∕4 , and ∕2 , respectively. The reduced frequency of the motion is selected 0.1 or 0.2. The obtained results show that the change in the distance to the ground does not change the nature of the operating regimes. In the Po regime, the Po efficiency of the Bio airfoil decreases with an increase in mean distance to the ground; however, it slightly changes for NACA 0015 airfoil. In the Po regime, the Bio airfoil has a higher efficiency than NACA 0015 airfoil. Due to the ground help, the leading edge vortex increases Po efficiency only on Bio airfoil. In the Pr regime, the Pr efficiency of both airfoils decreases with an increase in the distance to the ground, and NACA 0015 airfoil has a higher efficiency than Bio airfoil.

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Heaving and pitching oscillating foil propulsion in ground effect

Cited by 34 publications

References 26 publications

Development and Testing of a Pressure Sensor Integrated Foil

Development and Testing of a Pressure Sensor Integrated Foil

Aerodynamic Characteristics of Finite Rectangular Wings in Formation Flight with Ground Effect

The ground effect on flapping Bio and NACA 0015 airfoils in power extraction and propulsion regimes

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