Academic literature on the topic 'Vortex expansion machines'

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Journal articles on the topic "Vortex expansion machines"

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Vaneev, S. M., V. S. Martsynkovskyy, A. Kulikov, et al. "Investigation of a Turbogenerator Based on the Vortex Expansion Machine with a Peripheral Side Channel." Journal of Engineering Sciences 8, no. 1 (2021): F11—F18. http://dx.doi.org/10.21272/jes.2021.8(1).f2.

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The creation of energy-saving turbogenerators is an essential component of the development of small energy systems. The gradual growth of interest in distributed electricity generation necessitates the constant improvement of these units. Moreover, they implement a more environmentally friendly generation method than when using microturbine units that use fuel to carry out the work process. Nowadays, turbogenerators are created based on different types of expansion machines, which have their advantages and disadvantages, given in this article. Compared to competitors, vortex expansion machines
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Vanyeyev, S. M., D. V. Miroshnichenko, T. S. Rodymchenko, M. Protsenko, and D. V. Smolenko. "Data Measuring System for Torque Measurement on Running Shafts Based on a Non-Contact Torsional Dynamometer." Journal of Engineering Sciences 6, no. 2 (2019): e17-e23. http://dx.doi.org/10.21272/es.2019.6(2).e3.

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The need for power measurement transmitted by the running shaft has led to the need for using devices for measuring torque on the shaft. Of particular importance is the power measurement on high-speed machines, wherein some cases conventional measurement systems are either unsuitable or have low accuracy. Currently, data measuring systems are widely used in the researches of turbomachines. They allow to receive, process, transmit, store and display measurement data. Their application is relevant in relation to the priority of experimental study and subsequent modeling of characteristics and pe
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VANEEV, SERGEJ, VASYL MARTSYNKOVSKYY, MICHAL HATALA, et al. "RESULTS OF THE STUDY OF A TURBOGENERATOR WITH A PERIPHERAL-SIDE CHANNEL IN NON-DIMENSIONAL AND CRITERIAL COMPLEXES." MM Science Journal 2022, no. 3 (2022): 5913–17. http://dx.doi.org/10.17973/mmsj.2022_10_2022008.

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Dimensionless and criterial complexes are successfully used in many technical fields. They play an important role in research and design. There are a large number of dimensionless and criterial complexes, which have their advantages and are chosen depending on the topic and specific objectives of the study. The article considers dimensionless and criterial complexes most often used in studies of turbomachines, in particular vortex expansion machines - relative internal (isoentropic) efficiency, degree of pressure drop, adjusted wheel speed, speed coefficient, adjusted diameter, flow factor and
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Vaneev, S., D. Miroshnichenko, S. Meleychuk, and V. Baga. "Research of multi-flow and multi-channel flow parts of the vortex expansion machines with the external peripheral channel." IOP Conference Series: Materials Science and Engineering 233 (August 2017): 012020. http://dx.doi.org/10.1088/1757-899x/233/1/012020.

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Bondar, A. V., and S. M. Vaneev. "Research of Working Process of Vortex Expansion Machine with Side Channel." Journal of Engineering Sciences 5, no. 1 (2018): E 5—E 9. http://dx.doi.org/10.21272/jes.2018.5(1).e2.

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Ivanova, Tatiana Nikolajevna, Witold Biały, and Victor Nordin. "Improvement of grinding technology with vortex cooling of steels that are liable to crack propagation." Multidisciplinary Aspects of Production Engineering 2, no. 1 (2019): 9–23. http://dx.doi.org/10.2478/mape-2019-0001.

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Abstract Complexity of grinding process and phenomena entailing it not always allow reaching required technological results, especially while machining surfaces of parts made of tough-to-machine steels, which are liable to crack propagation. Cracks can occur in these parts during grinding due to considerable temperature difference along the section, which can cause formation of high temporary internal tensile stress. Application of cooled air in grinding process exerts considerable influence over temperature decrease in cutting area. In addition, it depends not only on heat exchange, but also
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Sesodia, Magnus, Shinichi Sunami, En Chang, Erik Rydow, Christopher Foot, and Abel Beregi. "CNN-Based Vortex Detection in Atomic 2D Bose Gases in the Presence of a Phononic Background." Machine Learning: Science and Technology, March 12, 2025. https://doi.org/10.1088/2632-2153/adbfdc.

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Abstract Quantum vortices play a crucial role in both equilibrium and dynamical phenomena in two-dimensional (2D) superfluid systems. Experimental detection of these excitations in 2D ultracold atomic gases typically involves examining density depletions in absorption images, however the presence of a significant phononic background renders the problem challenging, beyond the capability of simple algorithms or the human eye. Here, we utilize a convolutional neural network (CNN) to detect vortices in the presence of strong long- and intermediate-length scale density modulations in finite-temper
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Sunderland, Kevin, Tonie Johnson, David Liedl, et al. "Abstract 12495: Differentiating Slow- And Rapid-growing Abdominal Aortic Aneurysms Using Computational Modeling." Circulation 144, Suppl_1 (2021). http://dx.doi.org/10.1161/circ.144.suppl_1.12495.

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Introduction: Abdominal aortic aneurysms (AAA) are common among individuals over age 65 with a prevalence of 9%. Most AAAs are small and require surveillance imaging to monitor size and growth rates. Tools capable of predicting growth rates would be clinically useful. Hypothesis: We investigated how computational hemodynamics derived from CT angiography (CTA) differentiated slow and rapid-growing AAAs. Methods: Using readily available computing power in the clinical workflow, 3D models were generated for 25 subjects with AAA from available 3D CTA data. AAA growth rates were categorized as slow
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Dissertations / Theses on the topic "Vortex expansion machines"

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Ванєєв, Сергій Михайлович, Сергей Михайлович Ванеев, Serhii Mykhailovych Vanieiev, Дмитро Валерійович Мірошниченко, Дмитрий Валерьевич Мирошниченко та Dmytro Valeriiovych Miroshnychenko. "Определение оптимальных компоновочных схем проточных частей вихревых расширительных машин с внешним периферийным каналом". Thesis, Сумский государственный университет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46953.

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Ванєєв, Сергій Михайлович, Сергей Михайлович Ванеев, Serhii Mykhailovych Vanieiev, Дмитро Валерійович Мірошниченко, Дмитрий Валерьевич Мирошниченко та Dmytro Valeriiovych Miroshnychenko. "Влияние продольно вихревого течения на КПД проточной части расширительной машины с внешним периферийным каналом". Thesis, Сумский государственный университет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45737.

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В настоящее время для решений проблемы энергосбережения и экологии проводятся работы по использованию вихревых расширительных машин для утилизационных детандерних установок. Основными препятствиями на пути широкого внедрения маломощных (до 0.5 МВт) установок являются низкий для такой мощности КПД, высокие стоимость и относительные затраты на обслуживание по сравнению с мощными установками. В связи с этим было проведено исследование влияния основных геометрических и газодинамических параметров вихре
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Мірошниченко, Дмитро Валерійович, Дмитрий Валерьевич Мирошниченко та Dmytro Valeriiovych Miroshnychenko. "Підвищення енергоефективності пневмоагрегатів, створюваних на основі вихрових розширювальних машин". Thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75135.

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Дисертаційна робота присвячена підвищенню ефективності та надійності, визначенню області раціонального застосування пневмоагрегатів на основі вихрових розширювальних машин. Розроблено параметричну модель, методику експериментального та чисельного оптимізаційного дослідження багатопотокової вихрової розширювальної машини з зовнішнім периферійним каналом. Виконана багатокритеріальна оптимізація, яка дозволяє знайти геометричні параметри проточної частини, які забезпечують максимальний ККД, що дало змогу підвищити більш ніж на 15% (з рівня 30% до рівня більш 45%) оптимальні значення ККД вихрової
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Conference papers on the topic "Vortex expansion machines"

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Greenwood, Eric. "Estimating Helicopter Noise Abatement Information with Machine Learning." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12666.

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Machine learning techniques are applied to the NASA Langley Research Center's expansive database of helicopter noise measurements containing over 1500 steady flight conditions for ten different helicopters. These techniques are then used to develop models capable of predicting the operating conditions under which significant Blade-Vortex Interaction noise will be generated for any conventional helicopter. A measure for quantifying the overall ground noise exposure of a particular helicopter operating condition is developed. This measure is then used to classify the measured flight conditions a
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Fritsche, Manuel, Philipp Epple, and Antonio Delgado. "Impact of the Tip Clearance and the Inflow Nozzle Shape on the Performance of Low-Pressure Axial Fans." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-95881.

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Abstract Low-pressure axial fans have a very wide range of applications in the field of heating, ventilation and air conditioning as well as refrigeration (HVAC&R). Due to stricter legal requirements, increasingly higher fan efficiencies are required. Due to legal regulations, more efficient machines are becoming increasingly important. A small gap, the so-called tip clearance, is necessary between the rotating impeller and the stationary shroud due to manufacturing tolerances and structural-mechanical expansion as well as thermal expansion. However, this tip clearance has a strong impact
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Basak, Souvik, and Nabanita Datta. "Monopile Depth Sizing of Fixed Offshore Wind Turbines on Indian Territorial Waters: Dynamic Analysis of Towers Under Wind and Ocean Loads." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-104337.

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Abstract A semi-analytical dynamic analysis of the monopile tower of an offshore wind turbine is presented. The linearly tapered, hollow, steel tower (with circular cross-section) is modeled as a Euler-Bernoulli cantilever beam with a tip mass, which is partially submerged in water, and partially embedded in the sea-bed as a monopile. The total tower length depends on the water depth at the location, the blade length, and the soil characteristics. The blade length, and hence, the swept area also influences the power captured (rated power) and hence, the nacelle (machinery) weight, which acts a
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Saraswat, Ayush, Subhra Shankha Koley, and Joseph Katz. "Impact of Operating Conditions and Axial Casing Grooves on the Evolution of Flow Structure Across Blade Rows in an Axial Compressor." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82242.

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Abstract Stereo-PIV measurements in a series of axial planes investigate the impact of operating conditions and semicircular axial casing grooves (ACGs) on the evolution of flow structure across multiple blade rows in an axial compressor. The field of view extends radially from the hub to the tip, and circumferentially over entire blade passages. The flow is examined at two operating conditions, namely pre-stall flow rate and near the best efficiency point (BEP) of the untreated casing. Previous studies in this machine have shown that the ACGs improve the stall margin significantly but reduce
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