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A New Method of the Production of the THZ Electromagnetic Wave and Electromagnetic Paticle’s Flows and Other Application
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作者 Yin Ye Lun Fei +3 位作者 Youngqiang Zhu Chun Jeff Shi Huang Shen Xia 《Natural Science》 2014年第14期1186-1196,共11页
This paper reveals that a new method of the production of the THZ electromagnetic wave and electromagnetic particle’s flows is using a solid-consisted body, and the solid-consisted body is formed of the polylayer’s ... This paper reveals that a new method of the production of the THZ electromagnetic wave and electromagnetic particle’s flows is using a solid-consisted body, and the solid-consisted body is formed of the polylayer’s parallel nonferromagnetic knitted conductance’s nets: when a large powered (around 1000 W) microwave (2.45 G) once comes into the solid-consisted body, a change from microwave to electromagnetic particle’s flows takes place and it does not have a place-phase of the wave by its reflection and transmission between net and other net limitless times;and when the surface-induction’s current produces the electron’s transition in the net-holes, the THZ electro-magnetic wave is produced, and the THZ electromagnetic wave is divided into two parts: single frequency and continuous spectrum. When the THZ electromagnetic wave and the electromagnetic particle’s flows illuminate the living beings, the living beings will live better. 展开更多
关键词 KNITTED Conducted Net THZ electromagnetic Wave electromagnetic particle’s flows LIVE Better
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Exact Static Plane Symmetric Soliton-Like Solutions to the Nonlinear Interacting Electromagnetic and Scalar Field Equations in General Relativity 被引量:1
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作者 Arnaud Edouard Yamadjako Alain Adomou +2 位作者 Yélomè J. F. Kpomahou Jonas Edou Siaka Massou 《Journal of High Energy Physics, Gravitation and Cosmology》 2022年第1期164-177,共14页
This research work is related to soliton solutions considered as models that can describe the complex configuration of elementary particles from the study of the interactions of their fields. It is interested in the i... This research work is related to soliton solutions considered as models that can describe the complex configuration of elementary particles from the study of the interactions of their fields. It is interested in the interaction of fields between two different elementary particles by expressing their physical properties. For that, we have obtained, exact static plane symmetric soliton-like solutions to the nonlinear equations of interacting electromagnetic and scalar fields taking into account the own gravitational field of elementary particles using the calibrated invariance function <i>P</i>(<i>I</i>). It has been proved that all solutions of the Einstein, nonlinear electromagnetic and scalar field equations are regular with the localized energy density. Moreover, the total charge of particles is finite and the total energy of the interaction fields is bounded. It have been emphasized the importance to the own gravitational field of elementary particles and the role of the nonlinearity of fields in the determination of these solutions. In flat space-time, soliton-like solutions exist but the total energy of the interaction fields is equal to zero. We have also shown that in the linear case, soliton-like solutions are absent. 展开更多
关键词 sCALAR electromagnetic Gravitational Fields Interaction’s Description of Elementary particles
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Mathematical Wave Functions and 3D Finite Element Modelling of the Electron and Positron
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作者 Declan Traill 《Journal of Applied Mathematics and Physics》 2024年第4期1134-1162,共29页
The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric an... The wave/particle duality of particles in Physics is well known. Particles have properties that uniquely characterize them from one another, such as mass, charge and spin. Charged particles have associated Electric and Magnetic fields. Also, every moving particle has a De Broglie wavelength determined by its mass and velocity. This paper shows that all of these properties of a particle can be derived from a single wave function equation for that particle. Wave functions for the Electron and the Positron are presented and principles are provided that can be used to calculate the wave functions of all the fundamental particles in Physics. Fundamental particles such as electrons and positrons are considered to be point particles in the Standard Model of Physics and are not considered to have a structure. This paper demonstrates that they do indeed have structure and that this structure extends into the space around the particle’s center (in fact, they have infinite extent), but with rapidly diminishing energy density with the distance from that center. The particles are formed from Electromagnetic standing waves, which are stable solutions to the Schrödinger and Classical wave equations. This stable structure therefore accounts for both the wave and particle nature of these particles. In fact, all of their properties such as mass, spin and electric charge, can be accounted for from this structure. These particle properties appear to originate from a single point at the center of the wave function structure, in the same sort of way that the Shell theorem of gravity causes the gravity of a body to appear to all originate from a central point. This paper represents the first two fully characterized fundamental particles, with a complete description of their structure and properties, built up from the underlying Electromagnetic waves that comprise these and all fundamental particles. 展开更多
关键词 ELECTRON POsITRON Wave Function solution electromagnetic spin Mass Charge Proof Fundamental particle Properties Quantum Mechanics Classical Physics Computer 3D Model schrödinger Equation RMs KLEIN GORDON Electric Magnetic Lorentz Invariant Hertzian Vector Point Potential Field Density Phase flow Attraction REPULsION shell Theorem Ehrenfest VIRIAL Normalization Harmonic Oscillator
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Electromagnetic Shells of Atoms and the Periodic System of Elements 被引量:2
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作者 Robert A. Sizov 《Journal of Modern Physics》 2016年第16期2374-2397,共24页
Experimental and theoretical researches performed by the author (period: 1969-present) showed that the magnetic spinor particles (magnetic charges) are real structural components of atoms and substance and are immedia... Experimental and theoretical researches performed by the author (period: 1969-present) showed that the magnetic spinor particles (magnetic charges) are real structural components of atoms and substance and are immediate sources of all mag-netic fields and magnetic manifestations in Nature. Magnetic charges, which constitute together with electrical charges the atomic shells, got of the Author’s title: magnetons and antimagnetons (respectively, with magnetic charges g<sup>&minus;</sup> and g<sup>+</sup>, under fundamental condition: g = e). Besides, together with electrons and magnetic charges in the structures of atomic shells, in the same quantities as the electrons, exist real electric antispinors, i.e. the true antielectrons. In the structures of the atomic shells on each electron fitted still three a real spinor particles: two magnetic (magneton and antimagneton) and one electric, i.e. true antielectron with a charge of e<sup>+</sup>. The spinor particles in atomic shells exist in the form of the two spinor associations: the electromagnetic dibispinors or S-Gravitons and magnetic bispinors (spinorial magnetic dipoles). Magnetic bispinors, which inhabited on the 3d and 4f-shells are the sources of the atomic magnetic fields and are responsible at all magnetic manifestations of the so-called magnetic atoms (iron, nickel, cobalt and others). In composition of S-Graviton is two related bispinor (electric and magnetic). S-Gravitons make up bulk of the charged density of atomic shells and are direct sources of the atomic gravitational field.If to replace all electrons on known of the atomic levels and sub-levels on S-Gravitons, can get an idea about the real electromagnetic device atomic shells most of the elements making up the Periodic Table. In article shows features the structural organization real (electromagnetic) shells of atoms that make up the periodic system of elements, as well as is considered the possibility of adaptation of the well-known quantum numbers, the Pauli’s principle and Hund’s rule, in relation to the atomic electromagnetic device. The main reasons for the fact that the real magnetic charges, as well as the true antielectrons, were “buried alive” in the modern theories are as physics confinement them in atoms and substance, which is cardinally different from the confinement, for example, electrons, so and vicious electromagnetic concept of Maxwell. In the framework of this concept really existing in atoms and substance the magnetic charges, have been mistakenly substituted on acts of the mechanical displacement of electrical charges. 展开更多
关键词 Magnetic spinor particles (spinors and Antispinors) Magneton and Antimagneton Bispinor Dibispinor s-Graviton Physical Mass Vortex electromagnetic (Gravitational) Field Paragravitation and Ferrogravitation Gravito-Levitation Quantum Numbers
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Photon Can Be Described as the Normalized Mutual Energy Flow
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作者 Shuang-Ren Zhao 《Journal of Modern Physics》 2020年第5期668-682,共15页
Einstein guessed that the macroscopic electromagnetic wave is built by thousands of photons, however, no one has offered a theory about how the macroscopic electromagnetic wave is built from photons. A concrete theory... Einstein guessed that the macroscopic electromagnetic wave is built by thousands of photons, however, no one has offered a theory about how the macroscopic electromagnetic wave is built from photons. A concrete theory about photons is needed to answer this question. Current theory for photons is Maxwell’s equation which has the solution of waves, but it is difficult to describe the photon as a particle. There is the paradox problem of wave-particle duality. This article offers one solution to solve this problem by introducing the normalized mutual energy flow. The interaction of the retarded wave and advanced wave produce the mutual energy flow. The mutual energy flow satisfies the mutual energy flow theorem. The mutual energy flow theorem tells us that the energy that goes through each surface between the emitter and the absorber is all same. That means the mutual energy flow is different in comparison to the waves. The wave, for example, the retarded wave, its amplitude is decreased with the distance from the source to the point of the field. The mutual energy flow does not decrease. The author noticed this and claimed that the photon is the mutual energy flow. In this article the author updated this claim that the photon is the normalized mutual energy flow. Here the normalization of mutual energy flow will normalize the mutual energy flow to the energy of a photon, which is E = hf. E is the energy of the photon;h is Planck constant;f is the frequency of the light. This normalization is similar to the normalization in quantum mechanics. After this normalization the relation between an electromagnetic wave and photon as a particle becomes clear. This article will prove that the macroscopic wave of an electromagnetic field can be built by thousands of normalized mutual energy flows, which describes the photons. The mutual energy flow is an interaction of the retarded wave and the advanced wave. The retarded wave and the advanced wave satisfy the Maxwell equations. There are two additional waves which are the time-reversal waves which satisfy time-reversal Maxwell equations. The advanced wave and the two time-reversal waves are all real and physical electromagnetic fields. The time-reversal waves cancel all self-energy flows of the retarded wave and advanced wave. Hence, the waves do not carry any energy, the energy is only transferred by the normalized mutual energy flows which are the photons. Hence, all energy is transferred by the photon instead of waves. This offers a solution to paradox of the duality of wave-particle. 展开更多
关键词 Advanced WAVE Retarded WAVE TIME-REVERsAL WAVE PHOTON Mutual En-ergy Energy flow electromagnetic FIELDs NORMALIZATION Wave-particle DUALITY Electron Quantum
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改进的粒子群算法优化TSFNN的交通流预测 被引量:5
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作者 侯越 赵贺 《计算机工程与应用》 CSCD 2014年第4期236-239,共4页
为提高T-S模糊神经网络在交通流量预测的准确性,提出了一种改进的粒子群算法优化T-S模糊神经网络预测交通流量的算法。该算法利用改进粒子群算法通过群体极值进行t分布变异,使算法跳出局部收敛,使用改进的粒子群算法优化T-S模糊神经网络... 为提高T-S模糊神经网络在交通流量预测的准确性,提出了一种改进的粒子群算法优化T-S模糊神经网络预测交通流量的算法。该算法利用改进粒子群算法通过群体极值进行t分布变异,使算法跳出局部收敛,使用改进的粒子群算法优化T-S模糊神经网络,能够优化网络参数配置,进而提高网络的预测精度。利用优化后的T-S模糊神经网络对实测交通流量进行预测,实验仿真表明优化的T-S模糊神经网络可有效提高交通流量预测精度,减小预测误差。 展开更多
关键词 粒子群算法 T-s模型 模糊神经网络 交通流量预测
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改进粒子群优化Takagi-Sugeno模糊径向基函数神经网络的非线性系统建模 被引量:3
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作者 李丽娜 甘晓晔 +1 位作者 徐攀峰 马俊 《计算机应用》 CSCD 北大核心 2014年第5期1341-1344,1372,共5页
针对复杂非线性系统建模的难点问题,提出了一种基于改进的粒子群优化算法(PSO)优化的T-S模糊径向基函数(RBF)神经网络的新型系统建模算法。该算法将T-S模糊模型良好的可解释性及RBF神经网络的自学习能力相结合,构成T-S模糊RBF神经网络... 针对复杂非线性系统建模的难点问题,提出了一种基于改进的粒子群优化算法(PSO)优化的T-S模糊径向基函数(RBF)神经网络的新型系统建模算法。该算法将T-S模糊模型良好的可解释性及RBF神经网络的自学习能力相结合,构成T-S模糊RBF神经网络用于系统建模,并采用动态调整惯性权重的改进的PSO算法结合递推最小二乘算法实现网络参数的优化调整。首先,利用所提算法进行了非线性多维函数的逼近仿真,仿真结果均方差(MSE)为0.00017,绝对值误差不大于0.04,逼近精度较高;又将该算法用于建立动态流量软测量模型,并进行了相关的实验研究,动态流量测量结果平均绝对误差小于0.15 L/min,相对误差为1.97%,基本满足测量要求,并优于已有算法。上述仿真及实验研究结果表明,所提算法对于复杂非线性系统具有较高的建模精度和良好的自适应性。 展开更多
关键词 动态流量 软测量 T-s模糊模型 径向基函数神经网络 粒子群优化算法
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S偏振电磁波与粒子波之间的一一对应关系
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作者 雷清儒 羊玉清 《成都大学学报(自然科学版)》 1993年第2期29-35,共7页
给出了S偏振电磁波在分层介质中的传播和满足薛定谔方程的粒子的德布罗意波在一维势场中的传播,它们之间存在着一一对应的关系,分析和讨论了S波传播和粒子波传播的数学联系及物理意义的区别。
关键词 s偏振电磁波 粒子波 德布罗意波
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Particle Paths of Lagrangian Velocity Distribution Simulating Yin-Yang Balance in Ancient Tai-Chi Diagram 被引量:2
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作者 Tzu-Fang Chen 《Journal of Thermal Science》 SCIE EI CAS CSCD 2007年第2期140-144,共5页
The particle paths of the Lagrangian flow field simulate very well the interface curve of the Yin-Yang balance in the ancient Tal-Chi diagram. There are four forms called the "four states" in the Tai-Chi diagram. Of... The particle paths of the Lagrangian flow field simulate very well the interface curve of the Yin-Yang balance in the ancient Tal-Chi diagram. There are four forms called the "four states" in the Tai-Chi diagram. Of the four states, under Yang are the Major Yang and the Minor Yin, and under Yin are the Major Yin and the Minor Yang. The present study provides the proper positions of the four states in the ancient Tal-Chi diagram. The Fu Xi's Eight Trigrams Chart located along the ancient Tai-Chi diagram is also developed in the present study. The interface curve of Yin-Yang in the ancient Tai-Chi diagram has never been described mathematically. It can now be formulated by the equations describing the particle paths in the Lagrangian flow field. 展开更多
关键词 Lagrangian flow field particle path Yln-Yang balance ancient Tal-Chi diagram Fu Xi's Eight Trigrams Chart
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渗流的颗粒流细观模拟 被引量:49
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作者 周健 张刚 孔戈 《水利学报》 EI CSCD 北大核心 2006年第1期28-32,共5页
本文基于颗粒流理论,运用PFC2D计算程序的FISHTANK函数库和FISH语言,定义了细观角度概念———流体域,并分别定义了流体域的流动方程和压力方程,将颗粒体与流体域耦合,推导出颗粒流理论显式求解的稳定条件,成功地对土中的渗流进行了模拟... 本文基于颗粒流理论,运用PFC2D计算程序的FISHTANK函数库和FISH语言,定义了细观角度概念———流体域,并分别定义了流体域的流动方程和压力方程,将颗粒体与流体域耦合,推导出颗粒流理论显式求解的稳定条件,成功地对土中的渗流进行了模拟,得到了渗流过程中压力和流速的变化规律。结果表明,运用PFC2D程序模拟的渗流规律符合达西定律,这一结果为PFC2D在渗流和渗透破坏等方面的深入研究应用提供了一定的理论基础。 展开更多
关键词 颗粒流理论 达西定律 细观模拟 渗流
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等效岩体技术在岩体工程中的应用 被引量:40
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作者 吴顺川 周喻 +1 位作者 高利立 张晓平 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2010年第7期1435-1441,共7页
以某露天矿边坡为工程背景,结合岩石力学参数室内和现场原位试验,基于颗粒流理论和PFC3D程序,运用等效岩体技术,建立充分反映节理分布特征并考虑细观破裂效应的等效岩体模型,采用Fish语言编制加卸载命令流,研究岩体的强度和力学效应。... 以某露天矿边坡为工程背景,结合岩石力学参数室内和现场原位试验,基于颗粒流理论和PFC3D程序,运用等效岩体技术,建立充分反映节理分布特征并考虑细观破裂效应的等效岩体模型,采用Fish语言编制加卸载命令流,研究岩体的强度和力学效应。研究结果表明:(1)等效岩体在单轴压缩时,轴向应力–应变曲线分为弹性变形阶段、非稳定破裂塑性阶段和破裂后阶段,抗压强度和弹性模量与标准岩块试样相比,有较大幅度降低;(2)随围压增大,等效岩体抗压强度和残余强度明显提高,延性特征增强,逐渐向理想塑性过渡;(3)等效岩体技术能有效地描述岩体受节理分布影响而表现的各向异性特征;(4)等效岩体内部微裂纹主要沿节理走向分布并扩展,破坏形式受主导节理面产状及性质控制。 展开更多
关键词 岩石力学 颗粒流理论 等效岩体技术 黏结颗粒模型 光滑节理模型 三维结构面网络模型
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铝合金电磁净化过程中关键问题的探讨 被引量:5
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作者 张磊 焦万丽 +1 位作者 尉海军 姚广春 《铸造》 CAS CSCD 北大核心 2004年第10期801-804,共4页
介绍了有关电磁净化的原理和几种主要的净化方式,结合现在使用的电磁净化设备,总结出了电磁净化过程中的几个关键问题。指出待净化熔体中的杂质颗粒的状态和净化过程中熔体内产生的二次扰流现象直接关系到最终的净化结果和净化效率。
关键词 电磁净化 杂质颗粒 二次扰流 净化效率
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含石量对土石混合体剪切特性影响的颗粒离散元数值研究 被引量:33
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作者 杨忠平 雷晓丹 +2 位作者 王雷 胡元鑫 刘永权 《工程地质学报》 CSCD 北大核心 2017年第4期1035-1045,共11页
采用基于PFC^(2D)接触黏结模型的离散元数值模型,探讨含石量变化对土石混合体剪切特性的影响。利用室内大型直剪试验对表征土石混合体细观力学性质的模型参数进行标定,模拟分析了4种不同含石量土石混合体在4种不同围压作用下的剪切特性... 采用基于PFC^(2D)接触黏结模型的离散元数值模型,探讨含石量变化对土石混合体剪切特性的影响。利用室内大型直剪试验对表征土石混合体细观力学性质的模型参数进行标定,模拟分析了4种不同含石量土石混合体在4种不同围压作用下的剪切特性。试验结果表明:相同法向应力作用下,含石量越高,峰值剪应力越大,达到峰值剪应力时的剪应变越大,软化后强度越高,剪胀特性越强,剪切"跳跃"现象越明显。土石混合体摩擦角随含石量增高而增大;黏聚力随含石量增高而减小,含石量超过50%后基本不变。相同含石量的土石混合体,法向应力越高,峰值剪应力越大,应变软化特性越强。土石混合体剪切过程中以克服摩擦能和应变能为主,动能变化几乎为零。 展开更多
关键词 土石混合体 颗粒流 剪切特性 含石量
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提高含尘离心风机耐磨性能的气动措施的试验研究 被引量:6
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作者 伊景海 翁史烈 +1 位作者 吴铭岚 姚承范 《上海交通大学学报》 EI CAS CSCD 北大核心 1996年第2期47-51,共5页
通过试验对粘附于离心风机叶片压力面上的球状颗粒对风机耐磨性能的影响进行了可视化研究.结果表明,粘附于风机叶片压力面上的球状颗粒不仅可以有效地提高风机的耐磨性能,而且还可以通过改变球状颗粒在叶片压力面的分布来控制叶片的... 通过试验对粘附于离心风机叶片压力面上的球状颗粒对风机耐磨性能的影响进行了可视化研究.结果表明,粘附于风机叶片压力面上的球状颗粒不仅可以有效地提高风机的耐磨性能,而且还可以通过改变球状颗粒在叶片压力面的分布来控制叶片的主要磨损部位,最后对含尘离心风机实行气动保护的机理作了分析讨论. 展开更多
关键词 气固两相流 气动防磨技术 离心风机 耐磨性能
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土石混合体原位试验的颗粒流数值模拟分析 被引量:6
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作者 董启朋 卢正 +1 位作者 詹永祥 王家强 《上海交通大学学报》 EI CAS CSCD 北大核心 2013年第9期1382-1389,共8页
基于颗粒流理论和PFC程序,解决了不规则碎石(clump)的生成、恒定法向荷载施加、剪切面的含石量等问题后,建立了土石混合体原位试验的颗粒流数值模型,对不同含石量、法向应力下土石混合体的直剪试验进行模拟,并与原位直剪试验的结果进行... 基于颗粒流理论和PFC程序,解决了不规则碎石(clump)的生成、恒定法向荷载施加、剪切面的含石量等问题后,建立了土石混合体原位试验的颗粒流数值模型,对不同含石量、法向应力下土石混合体的直剪试验进行模拟,并与原位直剪试验的结果进行比较.结果表明:随着含石量增加,剪切应力及其峰值增大,剪切应力峰值对应的剪切位移减小;在低法向应力条件下,土石混合体表现为剪胀;在高法向应力下,土石混合体表现为先剪缩而后剪胀,并呈现出压剪破坏特征;剪切面附近分布的不规则碎石在剪切过程中出现挤压滑动与滚动,使得剪切破坏面出现凹凸,而且剪应力、法向位移、应变能随剪切位移增加而出现波动和平缓段;数值试验所得剪切应力峰值略高于其试验值,减小模型颗粒半径,可以有效降低计算的剪切应力峰值. 展开更多
关键词 土石混合体 碎石 细观力学 颗粒流 直剪试验
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双线浅埋隧道远近距离界定及地表沉降机理研究 被引量:7
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作者 王帅 孙少锐 +1 位作者 舒杨 岳翎 《长江科学院院报》 CSCD 北大核心 2017年第9期115-121,共7页
利用Peck公式计算双线隧道开挖引起的地表沉降时,有多个参数会影响到计算结果的大小与沉降曲线的形状。从数学角度对隧道轴线埋深h和两隧道间距L的比率及沉降槽宽度参数K对地表沉降曲线的影响进行研究,得到以下结论:在h/L比率逐渐增大... 利用Peck公式计算双线隧道开挖引起的地表沉降时,有多个参数会影响到计算结果的大小与沉降曲线的形状。从数学角度对隧道轴线埋深h和两隧道间距L的比率及沉降槽宽度参数K对地表沉降曲线的影响进行研究,得到以下结论:在h/L比率逐渐增大的过程中,地表沉降曲线变化过程为较陡峭的W型—较平缓的W型—∪型—U型—V型;相同比率下的地表沉降曲线都呈现相同的型式,与隧道埋深无关;在K=0.600的情况下,沉降曲线由W型向U型转变,h/L的临界值为0.825,而后发现在不同K值下,存在h/L临界值使得不同埋深下的沉降曲线都呈现U型,得到了沉降槽宽度参数K与其对应h/L临界值的最优拟合方程。基于h/L临界值的分析结果,提出了双线隧道远近界线的判别公式,并与现有方法及规范进行对比,结果表明判别公式能较好地界定双线隧道远近距离。同时,对Peck公式预测隧道开挖引起地表沉降的机理进行了推测,并利用颗粒流软件对隧道开挖进行模拟,结果表明压力拱曲线符合高斯曲线。研究成果可为双线浅埋隧道设计、施工提供依据。 展开更多
关键词 双线隧道 地表沉降 PECK公式 远近距离界线 颗粒流
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平面线圈电磁耦合的沿面DBD气体放电加速诱导气流的实验研究 被引量:2
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作者 刘汝兵 孙伟 +3 位作者 黄印阳 王萌萌 牛中国 林麒 《高电压技术》 EI CAS CSCD 北大核心 2014年第7期2101-2106,共6页
为了提高典型沿面DBD平板激励器诱导气流速度,通过实验研究了典型DBD平板激励器表面的磁场分布,提出了在DBD平板激励器的上、下电极之间夹进平面线圈,运用电磁耦合原理增强等离子体激励器放电效果,从而加速DBD等离子体诱导气流的方法。... 为了提高典型沿面DBD平板激励器诱导气流速度,通过实验研究了典型DBD平板激励器表面的磁场分布,提出了在DBD平板激励器的上、下电极之间夹进平面线圈,运用电磁耦合原理增强等离子体激励器放电效果,从而加速DBD等离子体诱导气流的方法。探究了不同结构参数的电感线圈产生的电磁耦合作用对大气压下平板式DBD等离子体激励器放电加强的效果,以及夹进平面线圈后加载电源的电压和频率对DBD放电的影响,并利用粒子图像测速技术测量了电磁耦合作用下典型DBD等离子体诱导气流流场,考察了其中电磁耦合对加速诱导气流的作用。实验结果表明,运用电磁耦合作用可在一定程度上增强等离子体激励器的放电效果,一些电感线圈产生的电磁耦合作用可显著改善DBD等离子体诱导气流的连续性和加厚流场区域。 展开更多
关键词 等离子体 电磁耦合 介质阻挡放电 诱导气流 平面电感线圈 粒子图像测速
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定床弯道内水沙两相运动的数值模拟 被引量:3
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作者 刘诚 沈永明 《力学学报》 EI CSCD 北大核心 2009年第3期318-328,共11页
在适体同位网格中采用非正交曲线坐标系下的三维k-ε-k_p固液两相双流体湍流模型研究弯道内水流和悬浮泥沙运动,主要计算了试验室S型水槽内清水流动的三维流场、120°弯道内水沙两相流动中底沙与底流的运动轨迹以及S型水槽内水沙两... 在适体同位网格中采用非正交曲线坐标系下的三维k-ε-k_p固液两相双流体湍流模型研究弯道内水流和悬浮泥沙运动,主要计算了试验室S型水槽内清水流动的三维流场、120°弯道内水沙两相流动中底沙与底流的运动轨迹以及S型水槽内水沙两相流动的两相流场和泥沙浓度场.对于S型水槽内清水流动,数值结果与试验结果吻合良好.120°弯道内水沙两相流动中固液两相的运动轨迹在弯道直线段基本重合,在弯道内泥沙轨迹逐步偏离水体轨迹,其偏离程度随泥沙粒径增大而增大.从S型水槽内水沙两相流动计算结果中发现泥沙纵向流速在壁面附近比水流纵向速度大,在远离壁面区域比水流纵向速度小;弯道内泥沙横向流速比水流横向流速小;垂向流速在直线段和泥沙沉速相当,在弯道内受螺旋水流影响而变化;两相流速差别随泥沙粒径增大而变大;泥沙浓度呈现下浓上稀的分布,在弯道内横向断面上呈现凸岸大凹岸小的分布,泥沙浓度随泥沙粒径增大而减小. 展开更多
关键词 自适应网格 三维κ-ε-κp模型 固液两相流 双流体模型 弯道 悬沙 流线
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气固两相压气机平面叶栅后气流参数的试验测量
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作者 伊景海 翁史烈 +2 位作者 耿利航 徐忠 马材芬 《上海交通大学学报》 EI CAS CSCD 北大核心 1996年第2期43-46,共4页
在粒子质量浓度a=2.0%、2.7%,叶栅进口气流速度ug=22m/s和冲角i=17°、27°多种工况下,测量栅后沿栅距和对高方向分布的气流参数.通过与纯气流条件下试验结果比较,分析了叶栅进口粒子浓度和冲角变... 在粒子质量浓度a=2.0%、2.7%,叶栅进口气流速度ug=22m/s和冲角i=17°、27°多种工况下,测量栅后沿栅距和对高方向分布的气流参数.通过与纯气流条件下试验结果比较,分析了叶栅进口粒子浓度和冲角变化对压气机平面对栅后气体流动参数的影响. 展开更多
关键词 气因两相流 压气机平面叶栅 出口参数
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金属导体直流电能的输运过程研究
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作者 樊京 方东哲 张操 《郑州大学学报(理学版)》 CAS 北大核心 2015年第2期104-108,共5页
提出了不同于传统电动力学的直流电能流输运过程解释,指出坡印廷能流的定义不能简单推广到直流电.通过对含欧姆定律的麦克斯韦方程组进行分析,证明了直流电的能流输运过程受扩散方程支配,与波动方程无关;发现经典坡印廷能流的推导过程... 提出了不同于传统电动力学的直流电能流输运过程解释,指出坡印廷能流的定义不能简单推广到直流电.通过对含欧姆定律的麦克斯韦方程组进行分析,证明了直流电的能流输运过程受扩散方程支配,与波动方程无关;发现经典坡印廷能流的推导过程存在隐含的物理学限制,导致其不适用于金属导体内电磁纵场的做功过程.研究表明,金属导体直流电能的输运过程及其支配方程均与洛伦茨力有关,与坡印廷矢量无关.研究结论可以推广至低频似稳态,从而为电工学和近场电磁学的研究带来广阔的前景. 展开更多
关键词 直流电能 坡印廷能流 欧姆定律 麦克斯韦方程 电磁近场
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