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Volume 29 Issue 3
Jul 2015
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Chinese Journal of High Pressure Physics  > 2015  >  29(3): 185-190.
CHEN Hao, CHEN Xiong, ZHOU Chang-Sheng, XUE Hai-Feng. Magnetohydrodynamic Numerical Study in a Supersonic Plasma Torch[J]. Chinese Journal of High Pressure Physics, 2015, 29(3): 185-190. doi: 10.11858/gywlxb.2015.03.004
Citation: CHEN Hao, CHEN Xiong, ZHOU Chang-Sheng, XUE Hai-Feng. Magnetohydrodynamic Numerical Study in a Supersonic Plasma Torch[J]. Chinese Journal of High Pressure Physics, 2015, 29(3): 185-190. doi: 10.11858/gywlxb.2015.03.004
shu

Magnetohydrodynamic Numerical Study in a Supersonic Plasma Torch

doi: 10.11858/gywlxb.2015.03.004

  • School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

  • Received Date: 13 Mar 2013
  • Rev Recd Date: 23 Oct 2014
    Abstract
  • A laval nozzle with a throat diameter of 2 mm and working current 100 mA was introduced, and on the basis of 2D rotational symmetry model, numerical simulation was taken for the plasma flow in and outside the plasma torch.By adoptting the magnetic vector potential magnetohydrodynamic (MHD) model for the internal nozzle, we avoided the complex integral calculation of self-induction magnetic field intensity, obtained the nozzle internal field coupling and external jet flow state.The impact of nozzle internal electromagnetic field on plasma acceleration and the jet development process were analyzed.The results show that the plasma experiences a 3-stage processes from subsonic to transonic, and to supersonic (2.3Ma).It provides a theoretical basis for the industrial application of supersonic plasma torch.

     

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