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Simulation study on evacuation of metal vapor in laser fusion liquid wall chamber

Y Kozaki, M Kabetani, H Nagatomo, K Yamamoto, T Yamanaka2002年Fusion Engineering and DesignIF 1.7出版社

AbstractSimulation studies on evacuation process in liquid wall chamber have been carried out. The evacuation speed in wetted wall concepts is a critical issue for pulse repetition rate. Then we have analyzed the evacuation process in high vacuum region using the DSMC code, which solves the Boltzmann equation. The simulation results of the DSMC code show that the effect of viscosity can't be neglected in the region where the gas pressure goes down to 10−3–10−4 Torr, near the saturated vapor pressure. When the surface temperature of liquid wall is adequately cooled, the evacuation speed from 10−2 to 10−4 Torr is rather fast because of the gas flow to the wall.

日本語訳

抄録液体壁チャンバー内の排気過程に関するシミュレーション研究を実施した。湿潤壁概念における排気速度は、パルス繰り返し率にとって重要な問題である。次に、ボルツマン方程式を解くDSMCコードを用いて、高真空領域における排気過程を解析した。DSMCコードのシミュレーション結果は、飽和蒸気圧付近の10⁻³~10⁻⁴Torrの圧力領域では、粘性の影響を無視できないことを示している。液体壁の表面温度を適切に冷却した場合、10⁻²~10⁻⁴Torrの範囲では、壁への気体流により排気速度はかなり速くなる。

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