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Influence of nose-perturbation location on behavior of vortical flow around slender body at high incidence

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Science China(Technological Sciences) 2009年第7期52卷 1933-1946页

作者： XiaoRong Guan Cheng Xu YongJuan Wang YaPing Wang School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China

Response of the vortical flow around a slender body of revolution at high incidence to the shift of a single nose perturbation was investigated systematically using numerical methods. A minute geometric bump was employed to act as the nose perturbation, and all computations were performed for subsonic flows at incidence of 50°. The computational results show that the vortical flow is more sensitive to the perturbation located axially closer to the nose apex of a slender body. With perturbation shifting axially downstream away from nose apex, there is a critical axial location appearing. The vortical flow is less sensitive to the perturbation located axially closer to the critical axial location; when perturbation traverses axially around the critical axial location, the vortical flow switches between opposite asymmetric patterns. The eventual influence of perturbation axial location on the vortical flow lies on both its relative locations to nose apex and the critical axial location. The vortical flow is more sensitive to the perturbation located circumferentially farther away from the fore-and-aft symmetric plane of a slender body, and just the asymmetrically-located perturbation can provoke the vortical flow to asymmetry. With perturbation shifting circumferentially in sequence, the vortical flow varies by degrees in manner of a single periodicity. A convective-type of instability existing in the flow field is responsible for the influence of nose perturbation on the vortical flow.

关键词： slender body of revolution high-incidence aerodynamics asymmetric vortical flow nose perturbation critical location

Key structure in laminar-turbulent transition of boundary layer with streaky structures

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Theoretical & Applied Mechanics Letters 2019年第1期9卷 32-35,I0005页

作者： Joe Yoshikawa Yu Nishio Seiichiro Izawa Yu Fukunishi Industrial Technology Institute Miyagi Prefectural Government Seikei University Tohoku University

A numerical simulation is performed to find out a key vortical structure in the laminar-turbulent transition. A low-speed streak is generated inside a laminar boundary layer using an isolated cuboid roughness, aimed at providing an environment unstable to outer disturbances. Then, a short duration jet is issued into the boundary layer. When the jet velocity is low, some vortices appear in the boundary layer, but the transition of the boundary layer does not take ***, when the jet velocity exceeds a certain threshold, two vortices newly appear above the elongated legs of a V-shaped vortex and only one of them is stretched and survives. After that,vortices are generated one after another around the survived one. By comparing the decayed and the survived vortices, it is found that the difference in their heights is the key characteristic which leads to the transition.

关键词： Turbulent onset Key vortical structure Laminar-turbulent transition Boundary layer Streaky structures Short duration jet Numerical simulation

Real Magnetic Poles (Magnetic Charges) in the Physics of Magnetism, Gravitation and Levitation

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Journal of Modern Physics 2015年第8期6卷 1013-1022页

作者： Robert A. Sizov Solid State Physics Institute Moscow Russia

Experiments executed by author of the present article (period 1968-1992) showed that the magnetic spinorial particles (magnetic charges) are real structural components of atoms and substance and are immediate sources of all magnetic fields in Nature. Joint orbital currents of electric and magnetic charges within atomic shells are the natural sources of gravitational field which is a vortical electromagnetic field. The vector nature of the gravitational field, in essence, is analogous to the vortical magnetic field that allows entering in the physical representations of such States of the gravitational field as paragravitation and ferrogravitation. Physical masses (atoms, substance, etc.), which emit ferrogravitational field, are repelled by sources paragravitational field, for example, from Earth. It is a manifestation of the effect of levitation, which was discovered by the author of this article. The forces of the technical levitation, which are formed by technical ferrogravitational fields, can be used in transport, lifting and space technology, energy and many other areas of human activity. The main reason that the real magnetic charges were “buried alive” in modern theoretical physics is the conditions of their confinement in the structures of atoms and substance, which is radically different from the confinement of electrons. Very negative role is played here by erroneous electromagnetic concept Maxwell, in which the magnetic field was officially deprived of their own source: magnetic pole or magnetic charge.

关键词： Magnetic Spinorial Particles (Spinors and Antispinors) Magneton and Antimagneton Bispinor Physical Mass vortical Electromagnetic (Gravitational) Field Paragravitation and Ferrogravitation Levitation Effect

Real Magnetic Charges in the Substance, Ferrogravitation and Technical Levitation

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Journal of Modern Physics 2015年第11期6卷 1591-1561页

作者： Robert A. Sizov Solid State Physics Institute Moscow Region Russia

Experimental and theoretical investigations by author of the present article (period: 1968-2013) have shown that the magnetic spinor particles (magnetic charges) are real structural components of atoms and substance and are immediate sources of all magnetic fields in Nature. Joint orbital currents of electric and magnetic charges within atomic shells are the natural sources of gravitational field which is a vortex electromagnetic field. The vector character of the elementary gravitational field is similar to the vortex magnetic field that allows entering in the submission of such fundamental states of the gravitational field, as a paragravitation and ferrogravitation. Physical masses (atoms, nucleons, substance, etc.), which emit ferrogravitational field are repelled off from sources paragravitational field, for example, from Earth. It is a manifestation of the effect of levitation, which was discovered by the author of this article. Technical forces levitation, that induced by technical ferrogravitational fields, could be used in transport, lifting and space technology, power engineering and many other areas of human activity. The main reasons that real magnetic charges are “buried alive” in modern theoretical notions are as physics their of confinement in the structures of atoms and substance which are radically different from the confinement of electrons so and fallacious electromagnetic concept Maxwell in which the magnetic field is by mistake deprived of its own source of the magnetic pole or of the magnetic charge.

关键词： Magnetic Spinor Particles (Spinors and Antispinors) Magneton and Antimagneton Bispinor Physical Mass vortical Electromagnetic (Gravitational) Field Paragravitation and Ferrogravitation Levitation Effect

Direct Numerical Simulation of a Jet Issuing from Rectangular Nozzle by the Vortex in Cell Method

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Open Journal of Fluid Dynamics 2013年第4期3卷 321-330页

作者： Tomomi Uchiyama Masahiro Kobayashi Shouichiro Iio Toshihiko Ikeda EcoTopia Science Institute Nagoya University Nagoya Japan Faculty of Engineering Shinshu University Nagano Japan Graduate School of Information Science Nagoya University Nagoya Japan

Direct numerical simulation of a jet issuing from a nozzle having a rectangular cross-section is conducted. The vortex in cell (VIC) method, of which computational accuracy was heightened by the authors in a prior study, is used for the DNS. The aspect ratio of the nozzle cross-section is 15, and the Reynolds number based on the shorter side length of the nozzle exit is 6700. The turbulence statics, such as the mean velocity and the turbulence intensity, are favorably compared with the experimentally measured results. The behavior of the large-scale eddies as well as the development of the turbulent flow is also confirmed to agree with the measurement. These indicate that the authors’ VIC method is successfully employed for the DNS of rectangular jet.

关键词： Rectangular Jet Vortex in Cell Method DNS vortical Structure

Dirac’s “Holes” Are the True Antielectrons and Real Particles of Antimatter

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Journal of Modern Physics 2015年第15期6卷 2280-2289页

作者： Robert A. Sizov Solid State Physics Institute Moscow Region Russia

Experimental and theoretical studies performed by the author showed that electric and magnetic spinor particles as spinors, i.e. particles of Matter so and Antispinors, particles of Antimatter, are structural components of atoms and substance. Together with electric spinors, for example, electrons in the structures of atoms and substances in same quantities, there are real electric anti-spinors, i.e. the true antielectrons, which are not to be confused with electronic vacancies or positrons. Atomic-shaped electromagnetic structures, consisting of electric and magnetic spinor particles, such as nucleons and atoms, represent a Physical Mass. A characteristic property of all varieties of Physical Mass is the ability to emit a gravitational field which is a vortex electromagnetic field. Sources of the gravitational field are joint orbital currents of electric and magnetic charges in the compositions of atomic or nucleon shells. The main reason that the real antielectrons turned out in the Physical sciences under the guise of Dirac’s “holes” or vacancies of electrons, is the Physics of the confinement of these particles in atoms and a substance that is fundamentally different from the confinement of electrons. So, namely Physics confinement of the magnetic spinor particles and electric antispinors in atoms is the main “culprit” creating a fallacious concept of purely electronic atomic shells. The main contributions to the formation of the above-mentioned misconceptions did as J. C. Maxwell with its primitive-surface electromagnetic concept so and P. Dirac, with his erroneous theory of electronic vacancies or “holes”.

关键词： Magnetic and Electric Spinorial Particles (Spinors and Antispinors) Antielectrons Magnetons Antimagnetons Bispinor Physical Mass vortical Electromagnetic (Gravitational) Field Energo-Medium Dark Energy