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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

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ISSN Печать: 1093-3611

ISSN Онлайн: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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THE CHARACTER OF FLOW IN THE FREE JET CLOSE TO AN ARC HEATER OUTPUT

Том 13, Выпуск 2, 2009, pp. 155-164
DOI: 10.1615/HighTempMatProc.v13.i2.40
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Краткое описание

The free jet of hot gas flowing out the output orifice of a hybrid water-argon arc heater is studied with emphasis on its interaction with the surrounding environment. The problem has been partly dealt with in the previous papers [1,2] for the region rather far from the output (nearly 40 cm from the output). In the present paper, attention is concentrated on the region close to the output of the arc heater where both the measuring method and equipment, and the computation process must be different, especially with respect to much higher temperatures and velocities. This article aims to deriving the method enabling to describe the interaction of free jet of the mixture of argon and water vapours with air of atmospheric pressure.
The designed mathematical model is based on the continuity and momentum equations determining the velocity field and is completed with the continuity equations for individual original components of plasma jet (argon, water vapour) including diffusion. The input experimental data of the model are temperature distribution measured by spectroscopy and axial velocity as described in [3,4]. The composition of the plasma jet at the arc heater's output has been calculated using emission coefficients of ArI (696.54 nm) and OI (715.67 nm) spectral lines [3]. Necessary data on thermodynamic and transport properties of individual species of the gas mixture have been taken from [5]. The designed model enables to compute the velocity field and to determine the influence of the coefficients characterizing laminar and turbulent part of viscosity and diffusion on the distribution of original components across the jet. Finally, the data on the diffusion of components computed by the designed method are compared with the data obtained from spectroscopic measurement.

ЛИТЕРАТУРА
  1. Gregor J., Jakubova I., and Senk J., Theoretical analysis of the influence of diffusion in free jet of hot gas mixture.

  2. Gregor J, Jakubova I, Mendl T, Senk J, and Konrad M, Interaction of hot gas mixture free jet with surrounding air.

  3. Sember V., Spectroscopic measurement of temperature and composition of plasma jet generated by a hybrid water argon torch.

  4. Sember V, Kavka T, Kopecky V, and Hrabovsky M., Comparison of spectroscopic and enthalpy probe measurements in H2O-Ar plasma jet.

  5. Pateyron B. and Delluc G., Computer Code T&T Winner.

  6. Gregor J, Jakubova I, Mendl T, Senk J, and Sember V., Determination of Basic Patrameters of Hot Gas Mixture Free Jet.

  7. Schlichting H., Theory of Boundary Layer.

  8. Launder B.E. and Spalding D.B., Mathematical Models of Turbulence.

  9. Boulos M.I., P. Fauchais , and Pfender M., Thermal Plasmas.

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