面向聚变堆排灰气的直线型水银扩散泵抽气性能DSMC模拟研究*

doi:10.13385/j.cnki.vacuum.2022.02.06

Abstract

Abstract: In the KALPUREX(Karlsruhe liquid metal based pumping process for fusion reactor exhaust gases) process proposed by Karlsruher Institut für Technologie(KIT), the linear mercury diffusion pump(LMDP) is used for the exhaust gas of fusion reactor to realize continuously pumping, so as to solve the problem of high tritium inventory caused by the use of the cryogenic pump. In order to support the design of LMDP, the pumping performance of LMDP is simulated based on the Direct Simulation Monte Carlo(DSMC) method. Based on the structure of LMDP in the early experiment, the pumping speed of air and the back-streaming rate of mercury are simulated, and their relationships with the pressure are analyzed. For hydrogen(as the representative of hydrogen isotope), helium, neon and argon, which would be contained in the exhaust gas of fusion reactor, the pumping performance of LMDP is simulated respectively. The relationship between the pumping speeds of different gases and their molar mass is consistent between the simulation result and the theoretical prediction.

Key words: exhaust gas of fusion reactor, DSMC, linear mercury diffusion pump, pumping speed, back-streaming rate

CLC Number:

TB752+.3

LIAO Ze-yu, MAO Shi-feng, ZHAO Chang-lian, YE Min-you. DSMC Simulation Study on the Pumping Performance of Linear Mercury Diffusion Pump for Exhaust Gas of Fusion Reactor[J].VACUUM, 2022, 59(2): 26-31.

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DSMC Simulation Study on the Pumping Performance of Linear Mercury Diffusion Pump for Exhaust Gas of Fusion Reactor

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