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Electric Arc Plasma Technology

#KR-1207


Development of Theoretical and Computational Models for Electric Arc Plasma Technologies Optimization

Tech Area / Field

  • FUS-PLA/Plasma Physics/Fusion

Status
3 Approved without Funding

Registration date
10.12.2004

Leading Institute
Institute of Physics, Kyrgyzstan, Bishkek

Supporting institutes

  • VNIIEF, Russia, N. Novgorod reg., Sarov

Collaborators

  • Korea Advanced Institute of Science and Technology, Korea, Taejon\nMetatech Corporation, USA, CA, Goleta

Project summary

The high demand for the research is caused by:
1. The electric arc devices used in practice are rather sophisticated and their components might be of rather complicated configuration. In this case, numerical simulation of their characteristics is rather difficult, e.g. it requires development of a difference grid and reference approximation of boundary conditions near to curvilinear boundaries of the components. For this reason, it is typically used a rectangular computational domain with no account for the electrodes and structural components but accounts only for the arc column. In this connection, a successful adaptation of dummy domain method for electric arc calculations will allow significant widening of the target applied problems, e.g. plasma flow near to electrode surface, liquid metal hydrodynamics in the electric arc weldpool.
2. Usually, 2D models are used for numerical analysis of thermal processes in low-temperature arc plasma. However, their application is limited with only axisymmetric plasma flows. In many electric arc devices and plasma technologies the heat/mass exchange processes have a complicated spatial character, e.g. multi-arc systems and electric arc in cross magnetic gas dynamic fields. In spite of numerous applied problems requiring solution there are practically no activities on non-axisymmetric electric arc plasma flows.
The goal of the Project is the development of theoretical models and numerical analysis of thermal processes in low temperature electric arc plasma.
In order to attain the goal stated, the following tasks should be accomplished:
· Development of graphics editor for visualizing images of 3D scalar and vector fields;
· Adaptation of the dummy domain method for computing electric arc parameters in a multiply-connected domain;
· Investigation of plasma flow near profiled electrode surface, and calculations of liquid metal hydrodynamics in the electric arc weldpool;
· Calculations of electric arc parameters in external lateral and transversal magnetic filed, as well as in crossing magnetic and gas dynamic fields.
The experts from IPh NAN KR have more than 20-year experience in numerical simulation of low temperature electric arc plasma. There were successfully developed electric arc steady-state and 3d models in the approximation of local thermodynamic equilibrium, as well as with account for arc plasma deviation from thermal and ionization equilibrium. The computer computational codes were also developed. Participants from VNIIEF are also experienced in numerical simulation of fusion plasma.
The proposed Project fits within the category of applied research.
The Project implementation will allow us :
· Develop theoretical and computational models for analysis of thermal processes in low temperature arc plasma; develop the graphics editor for visualizing 3D scalar and vector fields
· Understand the plasma flow nature near to the profiled electrode surface and estimate qualitatively the geometry contribution of each anode and cathode unit into electrode material erosion rate
· Estimate the role of the key physical factors forming hydrodynamics of liquid metal in the electric arc weldpool;
· Get a closer look at thermal processes in arc discharge in external magnetic and gas dynamic fields.
The results to be obtained might be applicable for plasma technologies, in order to optimize the metal welding and cutting operational modes by way of external magnetic and gas dynamic fields, when sputtering powder onto a sample treated.
The interactions with the foreign collaborators will take such forms as:
· Information exchange during the Project;
· Review of technical reports;
· Assistance to the project participant in attending international conferences;
· Joint working seminars.
The Project fulfillment will provide for VNIEF specialists formerly involved in nuclear arms development the opportunity of civilian occupation, and stimulate the integration of CIS scientists into the international community that will foster addressing of acute technical problems in electric arc technology. This complies fully with the ISTC mission and goals.
The main results will be disseminated.


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The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.

 

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