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Numerical modelling of plasma jet generated by plasma torch
Hirka, Ivan ; Němeček, Zdeněk (referee)
," The thesis and attached papers deal with some aspects of numerical modeling of plasma jet generated by plasma torch and also with numerical modeling of processes in thennal plasma reactor. All tlows are considered to be turbulent in all simulations except for special cases. First part of the thesis is dedicated to short introduction to the topic and to description of turbulent physical models that are used later in all next simulations. Second part is dedicated to description of physical experiment itself and to results that were obtained from numerical simulations. More details are given in following papers that concem 2D and 3D simulations of mixing of steam plasma jet with steam atmosphere, with nitrogen and simulation of gasification of wooden particles by steam plasma jet in thennal plasma reactor. Standard, RNG and realizable k-E models, and standard k-O)model were used for most of the simulations. Steam plasma and nitrogen transport and thennodynamic coefficients used in the computations were detennined under the assumption of existence of LTE. Results for temperature, velocity and density distributionsare discussedin each modelingand presented as images obtained from the FLUENT code, for currently used reactor geometry setup and plasma jet characteristics. Centerline temperature of steam...
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Numerical modelling of plasma jet generated by plasma torch
Hirka, Ivan ; Němeček, Zdeněk (referee)
," The thesis and attached papers deal with some aspects of numerical modeling of plasma jet generated by plasma torch and also with numerical modeling of processes in thennal plasma reactor. All tlows are considered to be turbulent in all simulations except for special cases. First part of the thesis is dedicated to short introduction to the topic and to description of turbulent physical models that are used later in all next simulations. Second part is dedicated to description of physical experiment itself and to results that were obtained from numerical simulations. More details are given in following papers that concem 2D and 3D simulations of mixing of steam plasma jet with steam atmosphere, with nitrogen and simulation of gasification of wooden particles by steam plasma jet in thennal plasma reactor. Standard, RNG and realizable k-E models, and standard k-O)model were used for most of the simulations. Steam plasma and nitrogen transport and thennodynamic coefficients used in the computations were detennined under the assumption of existence of LTE. Results for temperature, velocity and density distributionsare discussedin each modelingand presented as images obtained from the FLUENT code, for currently used reactor geometry setup and plasma jet characteristics. Centerline temperature of steam...
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Modelování směšování plazmatu vodní páry s parní atmosférou v tepelném plazmovém reaktoru
Hirka, Ivan ; Jeništa, Jiří ; Hrabovský, Milan
Two-dimensional CFD modelling of mixing of steam plasma jet with steam atmosphere in thermal plasma reactor has been carried out. Temperature of steam plasma is approximately 15 000 K and temperature of steam atmosphere is 400 K. Standard, RNG, and realizable k-e models were used for all simulations. Steam plasma and steam atmospheric properties were generated by the ADEP code. Results for temperature, velocity and density distributions are discussed and presented as images obtained from the FLUENT code, for currently used reactor geometry setup and plasma flow.
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