Uragan-2m Gas Mixing System

Lozin, A.V.; Kovtun, Yu. V.; Moiseenko, V.Е.; Maznichenko, S.M.; Baron, D.I.; Kozulya, M.M.; Krasyuk, A.; Listopad, V.M.; Gribanov, V.Yu.; Martseniuk, Yu.P.

doi:10.46813/2021-134-195

Cited by 2 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…В монографії [20] наведено огляд методів створення газових сумішей, які застосовуються в різноманітних технологічних процесах. Роботи [21,22] про створення газових сумішей із заданою точністю базуються на відомому способі послідовного напуску компонент газової суміші.…”

Section: вступunclassified

Числове Дослідження Змішування В Системі Генерації Газової Суміші

Гайдачук¹,

Шипуль²,

Заклінський³

et al. 2021

aktt

View full text Add to dashboard Cite

The subject of research is a gas-dynamic process of mixture formation with a given component mass fraction during overflow through the mixer nozzles in the mixture generation system. The aim of the study is the scientific and experimental evaluation of the mixer technical solutions to ensure the accuracy and homogeneity of the gas mixture. The current work conducts numerical study on the flow of a gas flow through the mixer nozzles of the mixture generation system, ensuring its stoichiometric component composition and homogeneity. The problem is solved by developing adequate mathematical models of gas-dynamic flow and analyzing the results of numerical simulations. The following results were obtained. A mixer with the nozzles in the mixture generation system has been created and a technical solution for its design has been scientifically substantiated. The areas of flow sections of mixer nozzles are experimentally established. A mathematical model of generating a mixture with a given component mass fraction was developed and a series of numerical experiments was conducted to study its overflow through the mixer. A 3D simulation was conducted using ANSYS CFX software. The stationary formulation of the problem is applied. In the nozzles of closed overflow of the mixer, the heat exchange of the gas flow with the walls is taken into account by solving a separate problem and determining the corresponding heat transfer coefficients. At the inputs to the mixer, the ratio of the initial pressure of the components of the mixture is determined, which ensures its stoichiometric composition. The fields of the gas flow velocities, the mass flow rate of the components of the gas mixture through the mixer, and pressure and temperature fields are obtained. Based on the simulation results, it was found that the design of the developed mixer ensures the creation of a gas mixture with a homogeneity of at least 3%. With a constant pressure ratio of the mixture components to the mixer inlet, the gas mixturedosing accuracy can be achieved at least 1%.

show abstract

Section: вступunclassified

Числове Дослідження Змішування В Системі Генерації Газової Суміші

Гайдачук¹,

Шипуль²,

Заклінський³

et al. 2021

aktt

View full text Add to dashboard Cite

show abstract

ICRF production of plasma with hydrogen minority in Uragan-2M stellarator by two-strap antenna

Kovtun,

Moiseenko,

Lozin

et al. 2024

Physics of Plasmas

View full text Add to dashboard Cite

The experiments on medium-size stellarator Uragan-2M (U-2M) in Kharkiv, Ukraine, are carried on in support of the Wendelstein 7-X (W7-X) experimental program. The scenario ion cyclotron frequency range (ICRF) plasma production at the hydrogen minority regime had been experimentally tested on U-2M and was qualified at the Large Helical Device (LHD). The paper presents the results of further research on the ICRF plasma production. The ICRF discharge studies were carried out in a H2 + He mixture with a controlled hydrogen concentration ranging from few percents to 75%. The two-strap like antenna mimicks the W7-X antenna operated in monopole phasing. The applied RF power was in the range of ∼100 kW. Relatively dense plasma of up to Ne ∼ 1019 m−3 was produced near the first harmonic of the hydrogen cyclotron frequency. The maximum temperature of the electrons and ions was not more than a few tens of electron volt. The characteristic features of RF plasma production and the propagation of electromagnetic waves in the experimental conditions are discussed. The experiments on U-2M and LHD indicate that the minority scenario of ICRF plasma production appears to be scalable and could be used in large stellarator machines. This is, in particular, important for the future experiments ICRF production of target plasma in W-7X in conditions where electron cyclotron resonance heating start-up is not possible.

show abstract

Uragan-2m Gas Mixing System

Cited by 2 publications

References 4 publications

Числове Дослідження Змішування В Системі Генерації Газової Суміші

Числове Дослідження Змішування В Системі Генерації Газової Суміші

ICRF production of plasma with hydrogen minority in Uragan-2M stellarator by two-strap antenna

Contact Info

Product

Resources

About