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THE STATIC EQUILIBRIUM OF AXIALSYMMETRIC MAGNETIC FLUX TUBE

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Science in China,Ser.A 1981年第12期 1680-1693页

作者：胡文瑞 Institute of Mechanics Academia Sinica

The axial-symmetric magnetic flux tube may be described as the slender *** series solutions of the exact nonlinear equations are obtained by expanding the polar anglein the spheric coordinate system for the boundary value problem of the static equilibriumconfiguration. By using these solutions, the features of the solar magnetic flux tube arediscussed. The results show that the magnetic field will be strenghened in the flux tube in casethat the transversal temperature has nonuniform distribution; the magnetic flux tube has thetendency to contract at the lower photosphere and expand at both sides; and the magnetic forcelines are twisted in the magnetic surface in general. The feature of the magnetic field variesfrom the forced one at the lower level to the force-free one at the upper level in a flux tube,and the much twisting of the flux tube in the lower level will make larger the magneticenergy of the transversal field on the upper level to supply the energy needed for solar ***, some typical models of the flux tube are discussed in detail.

关键词： THE STATIC EQUILIBRIUM OF AXIALSYMMETRIC MAGNETIC FLUX TUBE

地质工程一体化是实现复杂油气藏效益勘探开发的必由之路

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中国石油勘探 2017年第1期22卷 1-5页

作者：胡文瑞中国石油咨询中心

近年来,随着国内新发现油气资源品质的劣质化和老油田开发进入中后期,勘探开发面临巨大挑战,急需破解这些难题的新理念、新技术、新实践。美国非常规油气大规模开发的成果,极大地推动了多学科融合、多技术集成的一体化创新和发展之路。... 详细信息

近年来,随着国内新发现油气资源品质的劣质化和老油田开发进入中后期,勘探开发面临巨大挑战,急需破解这些难题的新理念、新技术、新实践。美国非常规油气大规模开发的成果,极大地推动了多学科融合、多技术集成的一体化创新和发展之路。面对目前低油价的挑战和"效益勘探开发"的基本要求,地质工程一体化模式应运而生,为中国油气田(特别是非常规油气田和复杂油气田)效益勘探开发探索出了一条新途径。目前地质工程一体化的组织思路和作业模式已在中国西部塔里木库车、四川海相页岩气、中东部低孔低渗油气藏开发中得到较成功的应用。文章阐述了地质工程一体化的基本概念、核心内涵、适用领域,探讨了地质工程一体化实施的3个必要条件;并提出了推动地质工程一体化发展的建议,即在扩大应用领域及规模的同时,通过建立学习曲线,摸索更有针对性的技术,在地质工程一体化管理模式上创新和实践,敢于突破体制界限,推进市场化及多元企业协同,实现整合技术优势,推进中国复杂油气藏提产增效的实质性效果。

关键词：地质工程一体化复杂油气藏页岩气致密油实践创新管理模式

THEORY OF SOLAR FLARE PRODUCED BY CASCADE SHOCK WAVES

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Chinese Science Bulletin 1982年第4期27卷 405-410页

作者：胡文瑞 Institute of Mechanics Academia sinica

With uninterrupted accumulation of the wealth of observed characteristics, there appear more and more theoretical models of the solar flare (see [1] and [2]). Results of the space observation seem to show that it requires only that the configuration of the magnetic field in the active region is one of bipolar arch, and this is different from that of the models of the neutral sheet of magnetic field. The process of the solar flare may not be always the same mechanism. In this paper, the solar flare triggered by caseade shock waves will be further discussed theoretically. The wave energy

关键词： triggered bipolar instability SOLAR excited wealth neutral stored tangential magnitude

THE MAGNETOSTATIC RELATIONS INCLUDING FLUCTUATION FIELDS

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Science in China,Ser.A 1983年第10期 1073-1083页

作者：胡文瑞 Institute of Mechanics Academia Sinica Beijing

The influences of the fluctuation fields are important in many astrophysical environments as shown by the observations, and can not be neglected. On the basis of the first-order smoothing approximation, in the present paper, we demonstrate the magnetostatic equations for both the cases of the conventional turbulence aud the random waves, and discuss the consistent conditions of the equations. In the static problem, the fluctuation Lorentz force（▽×δB）×δB influences the large-scale configurations of magnetic field. To study this influence in detail is quite necessary for the explanations of the observation features, especially for the astrophysical environments where the magnetic fields, including the fluctuation fields, are the dominant factors in the equilibrium of momentum and energy.

关键词： THE MAGNETOSTATIC RELATIONS INCLUDING FLUCTUATION FIELDS

THE MHD SLOW SHOCK IN THE POLAR REGION OF EARTH'S MAGNETOSPHERE

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Chinese Science Bulletin 1987年第2期32卷 86-91页

作者：胡文瑞 Institute of Mechanics Academia Sinica Beijinghe ions heated and accelerated in the ionosphere of polar region escaping from the Earth's gravitational field form the polar wind which transfers the ions of lower energy into the magnetosphere as an important source of magnetospheric particles. The polar wind consists mainly of H~+ and He~+ and a few O~+ of lower energy. The flux of hydrogen is10~7-5×10~8/cm~2s and that of helium is 10~5-10~7/cm~2s. Explorer-31 measured the out

The ions, heated and accelerated in the ionosphere of polar region, escaping from the Earth’s gravitational field, form the polar wind which transfers the ions of lower energy into the magnetosphere as an important source of magnetospheric particles. The polar wind consists mainly of H^+ and He^+, and a few O^+ of lower energy. The flux of hydrogen is10~7—5×10~8/cm^2s, and that of helium is 10~5—10~7/cm^2s. Explorer-31 measured the

关键词： polar gravitational helium accelerated heated transfers weakened sonic equatorial struc

美国低产油井产量变化规律与中国提高单井产量的实践

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石油学报 2014年第2期35卷 395-401页

作者：胡文瑞何欣鲍敬伟张洋中国石油天然气集团公司咨询中心北京100724 中国石油勘探开发研究院北京100083

美国低产井数量庞大，其平均单井日产量仅为整体平均单井日产量的1/6，80% 的低产井生产了20% 的原油，但对美国原油产量具有重要意义，美国低产井管理经验值得借鉴。中国同样面临多井低产的挑战，低产井可分为3种类型：1低品位储量低... 详细信息

美国低产井数量庞大，其平均单井日产量仅为整体平均单井日产量的1/6，80% 的低产井生产了20% 的原油，但对美国原油产量具有重要意义，美国低产井管理经验值得借鉴。中国同样面临多井低产的挑战，低产井可分为3种类型：1低品位储量低产井；2高含水低产井；3低产不出液井。预测当中国石油天然气股份有限公司可采储量采出程度上升到90% 时，低产井井数比例将增至2/3，产量将占29%~35%，合理利用和保护低产井对于保障中国能源安全具有重要意义。中国稳定及提高单井产量的主要措施包括：重大开发试验转变开发方式提高稠油、滩海等低品位油田单井产量；老油田二次开发和注水开发专项治理工程提升高含水油田单井产量；水平井规模应用与储层改造技术突破提高低渗透油田单井产量等。

关键词：低产井平均单井日产量能源安全重大开发试验水平井

ON THE MOVING CONFIGURATION OF MAGNETIC PLASMA

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Chinese Science Bulletin 1981年第6期26卷 572-573页

作者：胡文瑞 Institute of Mechanics Academia Sinica

In the physics of solar active period and many other astrophysical problems, one must consider the interrelations between gravitation, the gradient of pressure, the Lorentz force, and the motion of plasma. For axisymmetric problems, the scale magnetic potential ψ can be defined according to the condition of div B=0 in the cylindrical coordinary system, that

关键词： Lorentz cylindrical 箭卜 rotation angular translating gaseous

Dynamic damage characteristics and control mechanism of rocks anchored by constant resistance and energy absorption material

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International Journal of Mining Science and Technology 2025年第1期35卷 57-67页

作者： Bei Jiang Kunbo Wu Qi Wang Yetai Wang wenrui Wu Yaoxia Feng Yanbo Zhang State Key Laboratory for Tunnel Engineering China University of Mining&Technology-BeijingBeijing 100083China State Key Laboratory of Explosion Science and Safety Protection Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources North China University of Science and TechnologyTangshan 063210China

With resource exploitation and engineering construction gradually going deeper,the surrounding rock dynamic disaster becomes frequent and *** anchorage support is a common control method of surrounding rock in underground *** study the dynamic damage characteristics of anchored rock and the energy absorption control mechanism of dynamic disasters,a new type of constant resistance and energy absorption(CREA)material with high strength,high elongation and high energy absorption characteristics is developed.A contrast test of rockbursts in anchored rock with different support materials is *** test results show that the surface damage rates and energy release degree of anchored rock with common bolt(CB)and CREA are lower than those of unanchored rock,*** total energy,average energy and maximum energy released by CREA anchored rock are 30.9%,94.3%and 84.4%lower than those of CB anchored *** with unanchored rock,the rockburst peak stress in the CREA anchored rock is increased by 39.9%,and the rockburst time is delayed by 53.2%.Based on the rockburst energy calculation model,the evolution law of rockburst peak stress and energy release is *** control mechanism of CREA support units on rock dynamic failure is clarified.

关键词： Constant resistance and energy absorption Anchored rock Rockburst Peak stress Control mechanism

零重力条件下低温射流抑制大尺寸液氢储罐热分层的数值研究

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力学学报 2021年第4期53卷 1170-1182页

作者：郭斌赵建福李凯胡文瑞中国科学院大学工程科学学院北京100049 中国科学院力学研究所微重力重点实验室北京100190 中国科学院力学研究所高温气体动力学国家重点实验室北京100190

液氢是一种常用的沸点低、易蒸发的空间低温推进剂.空间微重力环境中浮力对流被极大减弱,当推进剂储罐壁面存在局部漏热时,储罐内部气液两相流体系会出现环绕漏热源的热分层现象,引起局部过热沸腾,导致储罐内部压力急剧增大,危害系统结... 详细信息

液氢是一种常用的沸点低、易蒸发的空间低温推进剂.空间微重力环境中浮力对流被极大减弱,当推进剂储罐壁面存在局部漏热时,储罐内部气液两相流体系会出现环绕漏热源的热分层现象,引起局部过热沸腾,导致储罐内部压力急剧增大,危害系统结构安全.利用低温射流抑制储罐热分层现象是一种有效手段.低温流体通过设置在储罐内部的射流喷嘴与储罐内部的流体混合,消减局部高温,实现温度的均匀化.采用全充满的二维大尺寸储罐模型,对零重力条件下液氢储罐内局部漏热引起的热分层现象开展了数值模拟,主要分析了位于靠近储罐底部的漏热带以及出口衔接段漏热带漏热形成的局部热分层现象的抑制和消除,并研究了不同低温射流条件对于消除零重力条件下液氢储罐内部热分层效果的影响.研究结果表明对于大尺寸储罐,当采用圆形射流喷嘴且低温射流条件相同时,射流喷嘴的位置对罐体内部热分层消除效果影响不是很明显.当射流喷嘴位于储罐内部同一相对位置且入射流量相同时,圆形射流喷嘴因出流方向更集中,罐内流场演变更快,消除热分层比半球形射流喷嘴更有效.

关键词：零重力低温推进剂热分层低温射流