Analysis of non-stationary flow interaction with simple form objects

Vutukuru, Shravan Koundinya; Vība, Jānis; Irbe, Martins; Tipāns, Igors

doi:10.15159/ar.19.083

Cited by 6 publications

(4 citation statements)

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“…1) The study is performed using a new model of wind and blade interaction, which the authors themselves have developed in recent years [25], [27]. This method is based on the application of pressure and suction zones without the use of experimental lift and drag coefficients.…”

Section: Resultsmentioning

confidence: 99%

“…To obtain useful power, this translation motion of blades 2 is transformed into the rotation of generator's rotor 3. Conveyor with one degree of freedom was presented by differential equation of blade translation motion described in previous paper [27]. In this case, we would like to present motion analysis for the generator with polynomial resistance force, for which the equation of generalized force 𝑄 composed by authors is:…”

Section: Methodsmentioning

confidence: 99%

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Dynamics analysis and structural synthesis of wind energy production device with closed loop conveyor

Beresnevich¹,

Cerpinska²,

Vība³

et al. 2022

Vib. proced.

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This paper deals with a dual design device for wind energy production, in which the movement of the blade consists of several stages, that is, two stages of rotation about two fixed axes and two stages of the blades straight translation movement. The proposed design offers a closed-shaped flattened conveyor equipped with several identical flat-shaped blades. The blades are mounted on a conveyor belt and have an opportunity to move together with the belt in one straight line direction. Therefore, air flow kinetic energy is transformed into translation motion of flat blades. The conveyor system has a built-in energy generator. To analyse blade interaction with air flow, a superposition principle is applied, in which the fast chaotic motion of air particles (Brownian motion) is separated from the slow flow motion with the given average velocity. On the base of such separation, a differential equation of motion for the entire conveyor system with one degree of freedom is obtained. Dynamics of the system due to the action of air flow is simulated with computer program Mathcad. Optimization of system parameters is performed, using a generated power as criterion. In addition, motion control at changeable airflow is optimized by selecting the blade orientation and corresponding adjustment of generator.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Dynamics analysis and structural synthesis of wind energy production device with closed loop conveyor

Beresnevich¹,

Cerpinska²,

Vība³

et al. 2022

Vib. proced.

View full text Add to dashboard Cite

show abstract

“…In accordance with this approach, a fast chaotic motion of fluid particles (Brownian motion) is separated from the slow-directed flow motion, with the given average velocity. In addition, the space around the blade is divided into two zones: one zone is the interaction pressure zone on the front side of the movement, and the other zone is at the rear, or the suction zone [9], [10]. Application of the method makes it possible to study flow -blade interaction without the use of experimental lift and drag coefficients.…”

Section: Materials Model and Methodsmentioning

confidence: 99%

“…For this purpose, the theorem of classical mechanics for the amount of movement changes in the differential form [12] can be used. As a result, after integration and summation over the entire system of conveyor with one degree of freedom, the following differential equation of blade translation motion is obtained [10]:…”

Section: Materials Model and Methodsmentioning

confidence: 99%

Conveyor-Type Small Hydropower Plant for Shallow River Waters

Beresnevich

Cerpinska

Irbe

et al. 2023

ETR

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This paper deals with the development of a small conveyor-type hydropower plant intended for operation in shallow river waters without construction of a dam. The proposed design offers a closed-shaped flattened conveyor equipped with flat-shaped blades. The conveyor is oriented perpendicular to the fluid flow. Several identical flat blades interacting with fluid flow are mounted on conveyor belt and move together with the belt in one straight line direction. Then after turning in the reversing mechanism, blades move in the opposite direction. The conveyor system has a built-in energy generator which drive shaft is connected with one of the reversing ends of the plant. Conveyor belt system dynamics analysis is performed on the base of equivalent model with one degree of freedom. The interaction of a moving conveyor flat blade in translation motion with fluid flow is studied by computer simulation with program Mathcad using a superposition principle. In accordance with this approach, a fast-chaotic motion of fluid particles (Brownian motion) is separated from the slow-directed flow motion, with the given average velocity. Optimization of system parameters (blade orientation angle to fluid flow, interaction constants of the braking generator) is performed, using a generated power as criterion. Simulation results confirm the serviceability and operational efficiency of the proposed hydropower plant in shallow river waters.

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