Studies of the Swirling Submerged Flow Through a Confuser

Rogovyi, Andrii; Khovanskyi, Serhii; Hrechka, Iryna; Gaydamakа, Anatoly

doi:10.1007/978-3-030-50491-5_9

Cited by 19 publications

(2 citation statements)

References 35 publications

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“…The attention of scientists and engineers all over the world is focused on solving them (Colmenar-Santos et al, 2019;Patlins, 2017;Patlins et al, 2019). A special place among corresponding issues belongs to improvement of the existing equipment (Rogovyi et al, 2020(Rogovyi et al, , 2021Bogajevskiy et al, 2019), techniques for its diagnostics (Hnatov et al, 2019), and maintenance and repair (Gnatov and Argun, 2015). All of the above directly applies to tractors since they perform up to 80% of technological operations in agriculture.…”

Section: Introductionmentioning

confidence: 99%

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Migal

Arhun

Shuliak

et al. 2022

Journal of Vibration and Control

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The paper deals with the development of a vibration-based technique for assessing quality and detecting design and manufacturing defects of tractor gearboxes. It highlights full-scale experimental studies of vibro-diagnostic characteristics of tractor gearboxes including carrying out vibration measurement and spectrum analysis; identifying statistical limit values of structural vibration parameters and their dependence on the technical condition of tractors; and comparing the vibration characteristics with acceptable vibrations which do not affect the acceleration of the process of tractor gearbox wear. All studies were conducted for tractor gearboxes of wheeled tractors T-150K, KhTZ-170, and T-17221 produced by Kharkiv Tractor Plant and equipped with identical tractor gearboxes of the same manufacturer. It has been determined that the vibration levels of gearboxes at the manufacturing stage exceed the acceptable vibrations by 10–30 dB. The main reason for the accelerated development of faults and decrease in the lifetime of most gearbox mechanisms is an increase in vibration loading by 2.5–31.6 times over the acceptable levels. The practical significance of the results obtained is in solving the problem of improving the design and manufacturing of tractor gearboxes T-150k through the use of the developed criteria for permissible vibration by methods of reducing the vibration level of detected defects. All the above mentioned makes it possible to create a complex of normative and technical, and methodological documentation to improve the reliability of tractors.

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Section: Introductionmentioning

confidence: 99%

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Migal

Arhun

Shuliak

et al. 2022

Journal of Vibration and Control

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“…The turbulence model chosen was the k−ω with shear stress transport [136], that was successfully used in cases involving highly detached zones [137] or swirling flows [138].…”

Section: Pressure Dropmentioning

confidence: 99%

Acoustic and fluid-dynamic characterization of state-of-the-art exhaust after-treatment systems.

Navarro¹

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Continuously tightening pollutant and noise emission regulations have been the key motivation for engine -and engine related technology-research, development and optimization. Such trend gave rise to the gradual introduction of after-treatment systems to reduce pollutant emissions in automotive applications. However, in the last two decades the level of restrictions have made the use of after-treatment systems intensive and mandatory, evolving from small individual devices to very complex systems often including more than one device.Even though the main purpose of after-treatment systems is pollutant emissions abatement, they also exert a strong influence on wave dynamics, back-pressure and acoustic behaviour of the exhaust line, therefore changing the flow, acoustic and pressure characteristics of the exhaust flow. This in turn redefines the boundary conditions for the main silencing device (muffler) placed downstream. A better understanding of the sound attenuation and pressure drop due to the presence of after-treatment systems could have beneficial impacts, allowing the optimized design of the devices and the complete exhaust lines, especially the muffler. It was considered that a promising approach to reach a better understanding on the matter would be to account for the influence that usual components and characteristics of after-treatment systems have on their actual behaviour.Experimental and modelling approaches were used to study and characterize the acoustic and fluid-dynamic behavior of a diverse set of state-of-the-art after-treatment systems and devices, covering a wide range of elements and characteristics representative of after-treatment applications of commercial use. Transmission loss and pressure drop were selected as the key parameters to account for the sound attenuation and back-pressure generated by each device. Well established measurement facilities and procedures were used for the experimental characterization. In parallel, 1D, 3D CFD and even coupled 1D-3D simulation approaches on the basis of the "virtual twinning" concept were implemented on commercial software, aiming to replicate the experimental results in order to provide additional information and help deepen the understanding of internal phenomena, three-dimensional flow and acoustic effects. i Funding Acknowledgements This research has been funded by the Programa de Ayudas de Investigación y Desarrollo PAID-01-19, from Universitat Politècnica de València (UPV), which granted my pre-doctoral contract. xvi "Investigar es ver lo que todo el mundo ha visto, y pensar lo que nadie más ha pensado". "Research is to see what everybody else has seen, and to think what nobody else has thought". -Albert Szent-Györgyi xvii * Pressure drop measurements in the cold flow test bench. * Transmission loss measurements in the impulse test rig.

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Design Calculation of Automatic Rotary Motion Electrohydraulic Drive for Technological Equipment

Sokolov

Porkuian

Krol

et al. 2021

Lecture Notes in Mechanical Engineering

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Studies of the Swirling Submerged Flow Through a Confuser

Cited by 19 publications

References 35 publications

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Acoustic and fluid-dynamic characterization of state-of-the-art exhaust after-treatment systems.

Design Calculation of Automatic Rotary Motion Electrohydraulic Drive for Technological Equipment

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