Mathematical Modelling and Numerical Investigations on the Coanda Effect

Dumiţrache, Alexandru; Frunzulică, Florin; IONESCU, Tudor

doi:10.5772/50403

Cited by 29 publications

(11 citation statements)

References 34 publications

(33 reference statements)

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“…These types of the instability phenomena or bifurcations may occur in fluid dynamics, already observed in early experiments [12], [13]. In [14] the pitchfork bifurcation flow in a symmetric 2D channel with contraction has been investigated.…”

Section: Stationary Bifurcation Flow Phenomenon Investigationsmentioning

confidence: 85%

Coanda Effect on the Flows Through Ejectors and Channels

Dumiţrache¹,

Frunzulică²,

IONESCU³

2018

AFASES 2018

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Section: Stationary Bifurcation Flow Phenomenon Investigationsmentioning

confidence: 85%

Coanda Effect on the Flows Through Ejectors and Channels

Dumiţrache¹,

Frunzulică²,

IONESCU³

2018

AFASES 2018

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“…Such Coandă jet has been utilized for circulation enhancement for fixed-wing aircraft in forward flight and turbine blades movement [4][5][6][7][8][9][12][13][14][15][16][17][18][19][20]. Thus, lift will be generated [27][28][29][30][31][32][33][34][35], which can be utilized for hover and later for cruise propulsion [10,35,36]. The principle of Coandă MAV lift generation as well as the equation of motion for its translatory motion will be derived and elaborated.…”

Section: Introductionmentioning

confidence: 99%

Overview of Coandă MAV as an Aerial Robotic Platform

Djojodihardjo¹

2017

Aerial Robots - Aerodynamics, Control and Applications

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With the increasing need of micro-air-vehicles (MAVs) and advances in MAV technology, Coandă MAVs offer new promises and challenges. In this context, Coandă MAVs capabilities are analyzed. As a baseline, a mathematical model for a spherical Coandă MAV in hover and translatory motion is developed and analyzed from first physical principles. A computational fluid dynamic (CFD) simulations for a Coandă MAV generic model are carried out to assess the theoretical prediction and obtaining further physical insight on the Coandă MAV flow physics. The mathematical model and performance measures are developed to assess the capability of the semi-spherical Coandă MAV in performing effective flight as an aerial robotic platform, as indicated by the relationships between the relevant parameters of the mathematical model of the Coandă MAV to its system of flight forces.

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“…They develop across the span, and they become larger with increasing distance from the nozzle. Although the longitudinal structures are not contributing to the mean spanwise distortion of the flow, they are strong enough to augment the Reynolds stresses that increase the rate of spread of the jet and its turbulent intensities [41][42][43].…”

Section: Weakening Of Coanda Effect Due To 3d Effectsmentioning

confidence: 99%

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

et al. 2013

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Abstract:The advantages associated to Vertical Short-Take-Off and Landing (V/STOL) have been demonstrated since the early days of aviation, with the initial technolology being based on airships and later on helicopters and planes. Its operational advantages are enormous, being it in the field of military, humanitarian and rescue operations, or even in general aviation. Helicopters have limits in their maximum horizontal speed and classic V/STOL airplanes have problems associated with their large weight, due to the implementation of moving elements, when based on tilting rotors or turbojet vector mechanical oriented nozzles. A new alternative is proposed within the European Union Project ACHEON (Aerial Coanda High Efficiency Orienting-jet Nozzle). The project introduces a novel scheme to orient the jet that is free of moving elements. This is based on a Coanda effect nozzle supported in two fluid streams, also incorporating boundary layer plasma actuators to achieve larger deflection angles. Herein we introduce a state-of-the-art review of the concepts that have been proposed in the framework of jet orienting propulsion systems. This review allows to demonstrate the advantages of the new concept in comparison to competing technologies in use at present day, or of competing technologies under development worldwide.

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Mathematical Modelling and Numerical Investigations on the Coanda Effect

Cited by 29 publications

References 34 publications

Coanda Effect on the Flows Through Ejectors and Channels

Coanda Effect on the Flows Through Ejectors and Channels

Overview of Coandă MAV as an Aerial Robotic Platform

A review of thrust-vectoring in support of a V/STOL non-moving mechanical propulsion system

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