Experimental Setup for Measurement of Contra-Rotating Propellers

Štorch, Vít; Brada, Martin; Nožička, Jiří

doi:10.14311/tpfm.2017.036

Cited by 5 publications

(4 citation statements)

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“…The experimental verification of the numerical method was performed using data from a previous experimental research of propellers [16,17]. Contra rotating propellers were measured only in static thrust condi- …”

Section: Experimantal Verification Resultsmentioning

confidence: 99%

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Contra-Rotating Propeller Aerodynamics Solved by a 3d Panel Method With Coupled Boundary Layer

Štorch

Nožička

2017

Acta Polytech

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Abstract. The aerodynamics of contra-rotating propellers is a complex three-dimensional problem of an unsteady flow, which is often approached by assuming numerous simplifications. Presented computational model combines a 3D panel method with a force-free vortex wake and a two-dimensional two-equation boundary layer model, in an attempt to capture all the main contributing elements of the flow physics. An emphasis is placed on the interaction of the viscous boundary layer region with the inviscid region and the development of a portable method of their coupling. The kinematics of a force-free vortex wake is supplemented with a vortex aging due to a diffusion. Extra attention is paid to the process of the blade passing through the wake of another blade. To demonstrate the ability of the numerical model, several test cases are presented illustrating the reaction of the system to various operational conditions.

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Section: Experimantal Verification Resultsmentioning

confidence: 99%

“…Contra rotating propellers used for the experimental verification were measured [16] only in static thrust conditions, where efficiency is always zero. In a propulsion system, the efficiency of producing a thrust in static conditions is expressed by the Figure of by Eq.…”

Section: Performance Parameters Of Single and Contra-rotating Propellersmentioning

confidence: 99%

Contra-Rotating Propeller Aerodynamics Solved by a 3d Panel Method With Coupled Boundary Layer

Štorch

Nožička

2017

Acta Polytech

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“…The coaxial pair also has an ability to obtain maximum thrust without the high Mach tip speed losses. On the other hand, coaxial propellers generate more noise, which can be lowered by differentiating of rotational speed between the two propellers [26]. The efficiency of the coaxial propeller pair is largely influenced by their mutual induced flow and by the flow around the beam between them [27,28].…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Pobikrowska

Goetzendorf‐Grabowski

2021

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The following paper presents wind tunnel investigation of aerodynamic characteristics of hovering propellers. This propulsion system may be applied on a lightweight Quad Plane VTOL (Vertical Take-Off and Landing) UAV (Unmanned Aerial Vehicle). A Quad Plane is a configuration consisting of a quadcopter design combined with a conventional twin-boom airplane. This kind of design should therefore incorporate the advantages of both types of vehicles in terms of agility and long endurance. However, those benefits may come with a cost of worse performance and higher energy consumption. The characteristics of a fixed-wing aircraft and propellers in axial inflow are well documented, less attention is put to non-axial flow cases. VTOL propellers of a hybrid UAV are subject to a multitude of conditions -various inflow speeds and angles, changing RPMs, interference between propellers and between nearby aerodynamic structures. The tested system presented in this article consists of four electric motors with two coaxial pairs of propellers mounted on one of the fuselage beams. Such a configuration is often chosen by designers of small and medium hybrid UAVs. There is a need for studies of clean, efficient ways of transporting, and this article can aid future designers of a new type of electric UAVs.

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“…Los ensayos a realizar y el equipo necesario para ellos son muy similares en la mayoría de los casos -e.g. Mattencini [190], Storch [191], Anemaat [186], Rutkay [187] y Jiao [59]. En general se suele usar un motor eléctrico del tipo brushless con la correspondiente ESC junto a la celda de carga y de torce correspondiente.…”

Section: Configuración Del Ensayo De Hélices Estratosféricas87unclassified

Estudio del sistema motopropulsivo para Pseudo-satélites = Design of the propulsion system for High Altitude Pseudo-Satellites

Gutiérrez¹

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Me gustaría agradecer, en primer lugar, a mis directores de tesis, Jesús Gonzalo de Grado y Deibi López por ofrecerme la oportunidad de realizar esta tesis y darme su apoyo a lo largo de todos estos años. También estaré siempre agradecido a Alberto Escapa y Diego Domínguez, por la ayuda que constantemente me han ofrecido y todo lo que aprendí de ellos.Gracias a mi familia, por ser ese pilar de apoyo indispensable. En especial, a mi madre y hermana, por soportarme en los malos días.

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Experimental Setup for Measurement of Contra-Rotating Propellers

Cited by 5 publications

References 1 publication

Contra-Rotating Propeller Aerodynamics Solved by a 3d Panel Method With Coupled Boundary Layer

Contra-Rotating Propeller Aerodynamics Solved by a 3d Panel Method With Coupled Boundary Layer

Bulletin of the Polish Academy of Sciences: Technical Sciences

Estudio del sistema motopropulsivo para Pseudo-satélites = Design of the propulsion system for High Altitude Pseudo-Satellites

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