A Charge Exchange Collision MCC Method for Numerical Simulation of Ion Thrusters
A technology of ion propulsion and charge exchange, applied in CAD numerical modeling, geometric CAD, special data processing applications, etc., can solve problems such as low efficiency and time-consuming calculation, and achieve the effect of saving calculation time and improving calculation efficiency
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[0024] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.
[0025] In the example, a two-dimensional axisymmetric plume model was tested, using xenon gas as the example of an ion thruster as the propellant. Its cross-sectional diagram is shown in Figure 4 As shown, the charge exchange collision of the ion thruster is simulated in the way of 2D3V. The number of simulated xenon ions is 1 million, and the initial velocity of xenon ions is υ bi , the initial positions of xenon ions are evenly distributed at the gate exit, and the collision cross section of charge exchange collision between xenon ions and xenon atoms is expressed as:
[0026] σ cex =(k 1 lnυ bi +k 2 ) 2 ×10 -20 m 2 (1)
[0027] For xenon ions, the constant coefficient k in the formula 1 =-0.8821,k 2 = 15.1262.
[0028] The probability of a charge exchange collision occurring is expressed as:
[0029] P=1-exp(-n 0 σ cex υ bi Δt) ...
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