Influence of Residual Fuel Ice in Micro Gas Filling Tube on the Temperature Control of ICF Cryogenic Target

LI Cui; ZHAO Xiaodi; LI Li; HU Menghua; LI Yanzhong; CHEN Xun

doi:10.7652/xjtuxb202206007

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Influence of Residual Fuel Ice in Micro Gas Filling Tube on the Temperature Control of ICF Cryogenic Target

更新时间：2025-04-27

- Influence of Residual Fuel Ice in Micro Gas Filling Tube on the Temperature Control of ICF Cryogenic Target
- Vol. 56, Issue 6, Pages: 50-57(2022)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202206007
  CLC： TB661
- Online First：10 June 2022，
  
  Published：2022
- 稿件说明：
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LI Cui, ZHAO Xiaodi, LI Li, et al. Influence of Residual Fuel Ice in Micro Gas Filling Tube on the Temperature Control of ICF Cryogenic Target[J]. 2022, 56(6): 50-57.
DOI：

LI Cui, ZHAO Xiaodi, LI Li, et al. Influence of Residual Fuel Ice in Micro Gas Filling Tube on the Temperature Control of ICF Cryogenic Target[J]. 2022, 56(6): 50-57. DOI： 10.7652/xjtuxb202206007.

摘要

针对微充气管内残留燃料冰影响冷冻靶控温过程这一问题

建立了基于Boussinesq假设和离散坐标辐射模型的三维数学模型

分析了管内残留燃料冰长度对基准、辅助加热以及快速降温3种工况下靶丸表面温度均匀性以及稳定性的影响。结果表明:基准稳态工况下

靶丸表面最大温差随管内燃料冰长度增长先降低后升高

燃料冰末端与靶丸外表面齐平(长度为0.09 mm)时

最大温差最小

相比于无燃料冰降低31.5%; 施加7 500 W/m

辅助热流的瞬态工况下

管内残留燃料冰长度不同时

靶丸表面最大温差随时间变化均表现为先增大后减小直至稳定不变

燃料冰长度较短(≤0.09 mm)时

靶丸表面均匀性恶化程度较轻; 以6 K/min进行线性快速降温过程中

管内燃料冰长度为0.09 mm时

降温过程中稳定性最好

降温结束时均匀性最佳; 当管内燃料冰长度为0.09 mm时

3种控温工况下靶丸表面温度均匀性及稳定性均较好

可达到较好的控温效果。

Abstract

The fuel capsule of cryogenic ICF target is generally filled through a micro tube. In order to generate the required smooth and uniform low-temperature layers

the capsule needs to be cooled and heated repeatedly with a residue of fuel ice in the gas filling tube until the crystal seed is formed and grows to a single-crystal layer. Based on Boussinesq assumption and the discrete coordinate radiation model

a three-dimensional simulation model is established to investigate the influence of the gas filling tube residual ice on the temperature control of fuel capsule

in detail

the influence of the length of the gas filling tube residual ice on the capsule temperature uniformity and stability in the standard steady-state

shimming heating and rapid cooling processes. Results show that in the standard steady-state process

the maximum temperature difference on the capsule surface lowers and then rises with the increase of the gas filling tube residual ice length

and when the ice end is flush to the outer surface of the capsule(optimal ice length of 0.09 mm)

the maximum temperature difference reaches the lowest level

lowered by 31.5% compared with the none ice residue condition. During the transient process of shimming heating

the maximum temperature difference on the capsule surface rises and then lowers with time

finally staying stable

and the capsule temperature uniformity is less deteriorated when the ice length in the gas filling tube is shorter than or equal to 0.09 mm. Moreover

the capsule with an ice length of 0.09 mm maintains the best temperature stability(during cooling)and uniformity(at the end of cooling)when it is linearly cooled at a rate of 6 K/min

thus ensuring relatively good temperature control performance.

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references

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