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This method is usually called the line-by-line calculation. By averaging the results of the line-by-line calculations, it is possible to create any group spectral models. Three group spectral models with 37, 74, and 148 spectral groups are demonstrated here. 6 reproduces the line-by-line and group absorption coefficients at temperatures of 4 000, 10 000, and 16 000 K. These temperature points give a representation of the features of the spectral absorption coefficients of hot air for dissociation temperatures (4 000 K), almost complete breakdown of the molecular components (10 000 K), and developed ionization (16 000 K).

V/ D V grad C Q† . 131) 40 Chapter 1 Models of gas-discharge physical mechanics Taking into account that C v @H u @H @x @r , cp T V grad D the analog of the continuity equation becomes: Q† div . V/ D G grad H , G D f u, vg. ri ri ANi ,j D Fi ,j D 1 , hj hj . ri C1 ri / , Ci ,j D Ai ,j C Bi ,j C ANi ,j C BN i ,j , , Ä Q Gu,i ,j C1 GQ u,i ,j 1 hj C ri C1GQ v,i C1,j ri i Ri Q 1 Gv,i 1,j . 7 (b). It is assumed that the numerical errors generated by the two kinds of grids will be neutralized in the third calculation step.

Nevertheless, practically explored models of the MW plasmatron allow the application of some simplifications. Some such models are presented below. The elementary one-dimensional computing model of MW discharge The MW discharge is considered in one-dimensional cylindrical geometry. It means that a change of its parameters in a radial direction is many times greater than changes in an axial direction. If gas-dynamic processes are negligible for such a discharge, the following governing equations can be used: Energy conservation equation: Â Ã dT 1 d r D r dr dr 1 jEj2 2 Equation for electric field intensity: Â Ã dE 1 d C !

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Boeing B2 Spirit

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