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Application of an empirical saturation rule to TGLF to unify low-k and high-k turbulence dominated regimes

机译:将经验饱和法则应用于TGLF以统一低k和高k湍流主导体制

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摘要

We propose a phenomenological turbulence saturation model and apply it to the TGLF turbulence transport model (Staebler et al 2007 Phys. Plasmas 14 055909), which captures the physics of interaction between low-k and high-k turbulence consistent with the multi-scale gyro-kinetic simulation result reported by Howard (2016 Nucl. Fusion. 23 056109). The new model, TGLF-Vx is tested with three discharges from DⅢ-D and EAST tokamak, which cover both low-k and high-k turbulence dominated regimes. It is found that the profile match can be substantially improved over previous models when evolving T_e, T_i and n_e simultaneously. Good agreement for all three discharges is obtained with one fixed parameter in the model when taking experimental uncertainties into consideration. Lastly, TGLF-Vx is applied to explore the sensitivity of the predicted CFETR steady-state performance to different transport models. Our result shows that a scenario using only RF auxiliary heating could be significantly affected.
机译:我们提出了一种现象学湍流饱和度模型,并将其应用于TGLF湍流传输模型(Staebler等人,2007 Phys。Plasmas 14 055909),该模型捕获了与多尺度陀螺仪一致的低k和高k湍流相互作用的物理原理。动力学模拟结果由霍华德(2016 Nucl。Fusion。23 056109)报告。新模型TGLF-Vx已通过DⅢ-D和EAST托卡马克的三种放电进行了测试,涵盖了低k和高k湍流为主的区域。发现当同时发展T_e,T_i和n_e时,轮廓匹配可以比先前的模型大大改善。考虑到实验的不确定性,在模型中使用一个固定参数可以获得所有三种放电的良好一致性。最后,TGLF-Vx用于探索预测的CFETR稳态性能对不同传输模型的敏感性。我们的结果表明,仅使用RF辅助加热的方案可能会受到严重影响。

著录项

  • 来源
    《Nuclear fusion》 |2018年第1期|016011.1-016011.13|共13页
  • 作者单位

    State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China;

    School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People's Republic of China,General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America;

    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China;

    State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America;

    State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China,School of Physical Sciences, University of Science and Technology of China, Hefei 230026, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    plasma turbulence; TGLF model; multi-scale simulation; experimental validation;

    机译:等离子体湍流TGLF模型;多尺度模拟实验验证;

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