An ongoing research to investigate the unsteady aerodynamics of insect flight is being conducted at the Fluid Mechanics Laboratory in NUS; the outcomes of which are important in the development Flapping Micro-Air-Vehicles. As part of this research, an experiment has been conducted on a simplified two-dimensional elliptic wing to study the effect of sinusoidal heaving (1.e. moving up and down) and pitching (Le. oscillating) motion of the wing on the generation of propulsion force. The wing has a chord length (distance between the leading and trailing edge of the wing) of c, and is pitching about the mid-chord (ie. c/2 from the Leading edge) as shown in Figure 3(a). The thrust or propulsive force of the wing (1) is expected to be a function of free stream velocity (U), chord length (c), frequency of heaving (f), amplitude of heaving (A), frequency of pitching (2), angular amplitude of pitching (a.), density of fluid (p) and dynamic viscosity (u). Rewrite this relation in non-dimensional form using p. U and c as repeating variables.

An ongoing research to investigate the unsteady aerodynamics of insect flight is being conducted at the Fluid Mechanics Laboratory in NUS; the outcomes of which are important in the development Flapping Micro-Air-Vehicles. As part of this research, an experiment has been conducted on a simplified two-dimensional elliptic wing to study the effect of sinusoidal heaving (1.e. moving up and down) and pitching (Le. oscillating) motion of the wing on the generation of propulsion force. The wing has a chord length (distance between the leading and trailing edge of the wing) of c, and is pitching about the mid-chord (ie. c/2 from the Leading edge) as shown in Figure 3(a). The thrust or propulsive force of the wing (1) is expected to be a function of free stream velocity (U), chord length (c), frequency of heaving (f), amplitude of heaving (A), frequency of pitching (2), angular amplitude of pitching (a.), density of fluid (p) and dynamic viscosity (u). Rewrite this relation in non-dimensional form using p. U and c as repeating variables.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.9P: When a sphere falls freely through a homogeneous fluid, it reaches a terminal velocity at which the...

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