Estimation of the Intensively Blasted Electric Arc Model Sensitivity to Selected Variables
DOI:
https://doi.org/10.14311/ppt.2019.1.47Keywords:
electric arc, arc heater, argon, modelingAbstract
Results of measurements carried out on the fabricated experimental modular-type arc heater serve as input data for the designed simplified model of the intensively blasted electric arc burning in argon inside the cylindrical arc heater's anode channel. The axial dependence of the arc temperature and radius is expressed using the exponent, the current density on the cathode tip and the arc temperature at the end of the near-cathode boundary layer. These quantities form the vector of state variables that is sought to minimize the value of the objective function expressing the deviations between measured and computed values. On a typical example, the paper demonstrates the sensitivity of the modelling to individual state variables.
References
J. Senk, I. Laznickova, and I. Jakubova. Estimation of electric arc power loss using net emission coefficient of argon. In Proceedings of EPE 2018. Brno Univ. of Technology, 2018. doi:10.1109/EPE.2018.8396015.
J. Senk, I. Jakubova, and I. Laznickova. Analysis of intensively blasted electric arc burning in the arc heater’s anode channel. Acta Polytechnica, 56(5):395–401, 2016. doi:10.14311/AP.2016.56.0395.
J. Senk, I. Jakubova, and I. Laznickova. Updated version of the simplified model of intensively blasted electric arc. Acta Polytechnica, 58(4):264–270, 2018. doi:10.14311/AP.2018.58.0264.
A. Farmer and G. Haddad. Material Functions and Equilibrium Composition of argon and Nitrogen Plasma. Csiro Division of Applied Physics, 1989.
O. Coufal. Composition and thermodynamic properties of thermal plasma up to 50 kk. J Phys D Appl. Phys, 40(11):3371–3385, 2007. doi:10.1088/0022-3727/40/11/018.
P. Kloc. Computed values of net emission coefficient of argon. Private communication, 2018.
H. Schlichting. Grenzschicht Theorie. Verlag G. Braun, Karlsruhe, Germany, 1965.
J. Lowke. Predictions of arc temperature profiles using approximate emission coefficients for radiation losses. J Quant Spectrosc Radiat Transfer, 14:111–122, 1974. doi:10.1016/0022-4073(74)90004-1.
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).