关键词: HL-2M装置, 雪花减偏滤器, 热流密度, 结构, 冷却水

Abstract:

The forecast heat flux on the target plates of the standard and the snowflake-minus divertors for HL-2M tokamak, has been simulated with the SOLPS code. Under the condition that the energy flowing into plasma is about 10MW, the temperature distributions of the structures and the cooling water, the deformations and thermal stress distributions of the structures are analyzed with CFX/ANSYS for the two configurations.. Simulation results indicate that, under the same power flowing into plasma edge region, the highest temperature of the target plate of the snowflake-minus divertor is 169℃ lower than that of standard divertor plate. Meanwhile, compared to the standard divertor, the maximum thermal stress and the deformation of the snowflake-minus divertor decrease by a factor of 3/7. Increasing the heat flux in proportion or extending the discharging duration, keeping the distributions of the heat loads on the target plates invariant, temperature rise of the target plate is lower and the cooling water temperature is more balanced for the snowflake-minus divertor. These indicate that the snowflake-minus divertor configuration has a stronger ability to withstand the flowing thermal energy of the divertor region which reduces the requirements of the engineering design.

Key words: HL-2M tokamak, Snowflake-minus divertor, Heat flux, Structure, Cooling water