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Observation of blobs using a gas puff imaging diagnostic on the HL-2A tokamak

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Plasma Science and Technology 2019年第8期21卷 12-17页

作者： Jinbang YUAN Boda YUAN Min XU Yi YU Lin NIE Rui KE Zhanhui WANG shaobo gong Ting WU Yifan WU Ting LONG Huajie WANG Hao LIU andWei YUE Southwestern Institute of Physics Chengdu610041People’s Republic of China University of Science and Technology of China Hefei230026People’s Republic of China

A gas puff imaging(GPI) diagnostic has been developed and applied to measure edge plasma turbulence on the HL-2A *** principle and experimental setup of GPI are *** is applied to investigate blobs in the edge and scrape-off *** characterizations of GPI line emission intensity are calculated, including the probability density functions(PDFs),skewness, and kurtosis of the intensity, which are found to be consistent with measurements by Langmuir ***, the track of blob motions is recorded by time sequence of individual *** characteristics of the original images and the relatively high-frequency(>10 kHz)/low-frequency(1–10 kHz) component images are *** observation of the blob’s structures and high-speed motions proves the success and high performance of the GPI diagnostic.

关键词： gas puff imaging diagnostic statistical characterization blob motions

Effect of resonant magnetic perturbation on boundary plasma turbulence and transport on J-TEXT tokamak

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Plasma Science and Technology 2019年第12期21卷 13-19页

作者： Ting WU Lin NIE Min XU Jie YANG Zhipeng CHEN Yuejiang SHI Nengchao WANG Da LI Rui KE Yi YU shaobo gong Ting LONG Yihang CHEN Bing LIU J-TEXT Team Southwestern Institute of Physics Chengdu 610041People's Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Department of Nuclear Engineering Seoul National UniversitySeoul 08826Republic of Korea School of Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China

The effect of resonant magnetic perturbation(RMP) on boundary turbulence and transport in J-TEXT plasma is experimentally *** plasma fluctuations in discharges with and without the(m/n=3/1) RMP currents are diagnosed by using Langmuir probe *** was found that fluctuations in the edge and scrape-off layer(SOL) regions decrease with the application of a 6 kA *** broadband turbulence at the radial location of ρ~0.9 which has a characteristic frequency of 40-150 kHz was strongly suppressed when applying RMP,as was the radial turbulent particle flux and blob transport in the near-SOL *** experimental findings make RMP a promising method of suppressing and controlling turbulence and particle transport in a plasma boundary.

关键词： RMP turbulent transport blob

Comparison between fluctuation of floating potential gradient and velocity of blob structure on HL-2A tokamak

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Plasma Science and Technology 2021年第5期23卷 42-48页

作者： Chenyu WANG Lin NIE Guixin TANG Min XU Rui KE Yihang CHEN Huajie WANG Zhanhui WANG Shilin HU Ting WU Ting LONG Yuxuan ZHU Hao LIU shaobo gong Jinbang YUAN Longwen YAN Southwestern Institute of Physics Chengdu 610041People’s Republic of China Harbin Institute of Technology Harbin 150001People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China

Several results based on the Langmuir probes’data on the HL-2A tokamak are *** blob structures’radial and poloidal drift velocities,estimated by the gradient of floating potential and by time delay evaluation,are compared in different line-averaged density and electron cyclotron resonance heating conditions.A positive correlation is observed in the comparison between blobs’radial velocity estimated by the two methods mentioned above,regardless of the situation differences mentioned *** is also observed in the comparison between the blobs’poloidal velocity estimated by the two methods in different situations,while a shift due to the different line-averaged density is *** results imply that the radial gradient of floating potential may have some value as a reference during data analysis in low-parameter discharge.

关键词： Langmuir probe blob structure scrape-off layer

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莺歌海盆地中央底辟带油气成藏条件分析

石油与天然气地质 2000年第3期21卷 232-235页

作者：宫少波王彦中国海洋石油勘探开发研究中心河北高碑店074010

莺歌海盆地位于海南岛以西、中南半岛以东的海域 ,总体呈NWSE向。该盆地由中央底辟带和斜坡带两个构造单元组成。底辟带发育中新统 (莺黄组、梅山组和三亚组 )及渐新统 (崖城组 )两套烃源岩 ,生油门限深度在 2 80 0～ 3 0 0 0m之间 ;主... 详细信息

莺歌海盆地位于海南岛以西、中南半岛以东的海域 ,总体呈NWSE向。该盆地由中央底辟带和斜坡带两个构造单元组成。底辟带发育中新统 (莺黄组、梅山组和三亚组 )及渐新统 (崖城组 )两套烃源岩 ,生油门限深度在 2 80 0～ 3 0 0 0m之间 ;主要圈闭由底辟流体上拱形成 ,底辟活动的幕式发育决定了油气幕式运移。不同的油气运移动力形成了不同类型的油气藏 :中新统源岩在高温高压及欠压实作用下 ,形成高压囊 ,使上覆地层破裂 ,产生高角度断层和裂隙 ,烃类气沿此形成深部及浅部气藏 ;另外 ,本区深部的无机成因CO2 气在高压作用下 ,排驱断裂附近的烃类气 ,一方面对原有气藏进行破坏 ,另一方面在远离断裂的两翼形成含少量CO2

关键词：烃源岩底辟带活动高压囊油气藏莺歌海盆地

System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak

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Chinese Optics Letters 2018年第12期16卷 31-36页

作者： Yi Yu shaobo gong Min Xu Boda Yuan Yifan Wu Lin Nie Rui Ke Minyou Ye Xuru Duan School of Physics University of Science and Technology of ChinaHefei 230026China Southwestern Institute of Physics Chengdu 610041China

System validation and density fluctuation calibration of phase contrast imaging(PCI) on an HL-2 A tokamak are presented. Signals from different channels show not only a pronounced modulation of an incident laser beam induced by a sound wave, but also an excellent magnification and low image distortion of optics. The frequencywavenumber spectrum is achieved by using two-dimensional Fourier transform of time series signals. The conversion coefficient between detected signal amplitude and chord integral plasma density fluctuation is 2.35 × 1013m-2/mV, which promises a suitable signal level at the order of volts of the PCI in typical HL-2 A discharges.

关键词： System validation of CO2-laser-based phase contrast imaging on HL-2A tokamak PCI HL CO

Progress of plasma density fluctuation measurements with phase contrast imaging on HL-2A tokamak

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Plasma Science and Technology 2019年第8期21卷 5-11页

作者： shaobo gong Yi YU MinXU Aiping SUN Tao LAN Lin NIE Rui KE Ting LONG Hao LIU, YifanWU Boda YUAN Huajie WANG Jinbang YUAN Zhongbing SHI Wulv ZHONG Shifeng MAO Minyou YE andXuru DUAN University of Science and Technology of China Hefei230026People’s Republic of China Southwestern Institute of Physics Chengdu610041People’s Republic of China

A CO2 laser-based phase contrast imaging(PCI) diagnostic has been developed on HL-2A *** can detect line integrated plasma density fluctuations by measuring the phase shift of laser beam after being scattered by the bulk *** diagnosed radial region ranges from ρ≡r/a =0.625 to 0.7.32-channel HgCdTe detectors with alternative-current biased amplifiers are arranged in line at the imaging plane of the optical *** PCI is able to diagnose density fluctuations with wavenumbers ranging from 2 to 15 cm-1 and the time resolution is better than 2 μ*** first experimental data were achieved in 2018 spring campaign of HL-2A *** performance is confirmed in different discharging configurations and makes it a keen tool in broadband turbulence investigations.

关键词： phase contrast imaging phase shift density fluctuation turbulence

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高职院校实施精准扶贫的路径研究

科教导刊 2019年第20期 181-182页

作者：龚绍波湖南城建职业技术学院

高职院校实施精准扶贫是服务社会的途径,彰显社会责任和应尽的义务,更是对传统扶贫理念的一种创新。高职院校在精准扶贫实施过程中,在对贫困地区和贫困学生进行经济资助的同时,也同时对他们进行心理的帮扶,让他们从精神意识上摆脱贫困,... 详细信息

高职院校实施精准扶贫是服务社会的途径,彰显社会责任和应尽的义务,更是对传统扶贫理念的一种创新。高职院校在精准扶贫实施过程中,在对贫困地区和贫困学生进行经济资助的同时,也同时对他们进行心理的帮扶,让他们从精神意识上摆脱贫困,创新育人的理念到助人的理念。但目前我国高职院校精准扶贫的道路还处于探索阶段,存在许多问题与困境。高职院校如何利用有效的政策和方案,贯彻扶贫的举措,不断总结经验,切实让贫困山区和贫困学子能有效获得帮助,为小康社会的实现贡献力量,是扶贫攻坚道路上的重要途径之一。

关键词：高职精准扶贫路径

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基于界面单元的蜂窝夹层结构失效分析及验证

哈尔滨工程大学学报 2022年第6期43卷 787-793页

作者：韩刘齐辉门坤发朱洪艳宫少波哈尔滨工程大学航天与建筑工程学院黑龙江哈尔滨150001 航空工业哈尔滨飞机工业集团有限责任公司黑龙江哈尔滨150066

蜂窝夹层结构斜削区传力路径复杂且易出现脱粘损伤,此处一旦发生脱粘会直接改变传力路径,进而促使结构发生整体失效。本文引入cohesive界面单元,依据二次应力准则和基于能量的B-K准则来模拟斜削区胶层的损伤扩展,分析了在压缩载荷下蜂... 详细信息

蜂窝夹层结构斜削区传力路径复杂且易出现脱粘损伤,此处一旦发生脱粘会直接改变传力路径,进而促使结构发生整体失效。本文引入cohesive界面单元,依据二次应力准则和基于能量的B-K准则来模拟斜削区胶层的损伤扩展,分析了在压缩载荷下蜂窝夹层结构斜削区的失效模式。采用实验测试Nomex纸蜂窝铝合金面板夹层结构在压缩载荷下斜削区的破坏模式及内外面板载荷分配情况。研究结果表明:仿真实验结果具有较好的一致性,应力最大区域为夹层结构实验件的4个斜削区,斜削区尖角处的胶层最先出现损伤,裂纹沿外面板与蜂窝粘接处扩展,胶层失效导致外面板局部刚度骤减,在压缩载荷下发生屈曲失效。此外进一步分析了蜂窝夹层结构的蜂窝性能、填料性能及曲率半径对内外面板应力分布的影响,为蜂窝夹层结构优化设计提供依据。

关键词：夹层结构斜削区 cohesive单元分层渐进失效蜂窝性能填料性能曲率

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复合材料波纹梁冲击试验与数值模拟

复合材料学报 2015年第1期32卷 196-203页

作者：孟祥吉燕瑛罗海波侯康梁祖典宫少波北京航空航天大学航空科学与工程学院北京100191 哈尔滨飞机工业集团有限责任公司哈尔滨150066

为了探究复合材料波纹梁的吸能性能,针对铺层形式分别为[(±45)3/(0,90)/(±45)3]、[(±45)8]和[(±45)7]的3种复合材料波纹梁元件,进行了动态冲击试验,得到了吸能载荷-位移曲线,并对其损伤破坏形貌进行了分析。以连续损伤力学为基础,... 详细信息

为了探究复合材料波纹梁的吸能性能,针对铺层形式分别为[(±45)3/(0,90)/(±45)3]、[(±45)8]和[(±45)7]的3种复合材料波纹梁元件,进行了动态冲击试验,得到了吸能载荷-位移曲线,并对其损伤破坏形貌进行了分析。以连续损伤力学为基础,结合改进的Hashin损伤判定准则以及损伤演化规律,提出了针对波纹梁耐撞性损伤分析的刚度退化模型,并基于有限元软件平台开发了适用于波纹梁渐进损伤分析的子程序。对3种不同结构形式的波纹梁进行了渐进失效数值分析,模拟得到了能量评估参数比吸能(SEA)和平均载荷值,并将模拟结果与试验结果进行了对比分析。比较分析了不同薄弱环节复合材料波纹梁的吸能能力。结果表明:波纹梁在冲击载荷作用下发生了渐进压溃失效;平均压溃载荷的相对误差不超过12%,能够满足工程应用要求;薄弱环节的设置需综合考虑复合材料性能和铺层方式等因素。

关键词：复合材料波纹梁耐撞性数值模拟渐进损伤