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Radiation–Magnetogasdynamic Calculations in the Interaction of Powerful Energy Flows with Matter in a Magnetic Field 磁场中强能量流与物质相互作用中的辐射-磁气动力学计算
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-10-29 DOI: 10.1134/S1063784224700713
V. V. Kuzenov, S. V. Ryzhkov
{"title":"Radiation–Magnetogasdynamic Calculations in the Interaction of Powerful Energy Flows with Matter in a Magnetic Field","authors":"V. V. Kuzenov,&nbsp;S. V. Ryzhkov","doi":"10.1134/S1063784224700713","DOIUrl":"10.1134/S1063784224700713","url":null,"abstract":"<p>This study is aimed at the theoretical investigation of interaction of powerful energy beams with a plasma in a magnetic field, as well as at the elucidation of thermal-physics and fluid-dynamics problems in such calculations. We consider different regimes of a linearly stabilized surface discharge and estimate radiation–plasmadynamic regimes and structures in powerful emitting jets of a surface discharge. Time dependences of the main characteristics are plotted for different voltages and discharge channel lengths for argon and air.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2372 - 2378"},"PeriodicalIF":1.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diagnostics of Development of Resonance Effects Based on the Application of the Acoustic Resonance Method 基于声共振法应用的共振效应发展诊断
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-10-18 DOI: 10.1134/S1063784224700695
O. V. Mitrofanova, I. G. Pozdeeva, N. A. Starovoitov
{"title":"Diagnostics of Development of Resonance Effects Based on the Application of the Acoustic Resonance Method","authors":"O. V. Mitrofanova,&nbsp;I. G. Pozdeeva,&nbsp;N. A. Starovoitov","doi":"10.1134/S1063784224700695","DOIUrl":"10.1134/S1063784224700695","url":null,"abstract":"<p>Our experimental and theoretical investigations are aimed at determining conditions for the excitation of resonance effects in complex hydromechanical systems and the development of a diagnostic method for preventing hazardous vibronoise regimes in them. In analysis of the acoustic vibration spectrum obtained in the experiments based on acoustic resonance method, three vibronoise regimes have been singled out: the subsonic regime, the beat regime, and the resonant regime. In the beat and resonant regimes, pronounced acoustic vibrations have been detected (moderate-intensity vibrations in the beat regime and high-intensity vibrations in the resonant regime). The resonant regime of operation is distinguished by the highest acoustic vibration amplitude and can pose a threat for reliable and safe operation of power stations. It is shown that the vortex flow structuring effect can be diagnosed from the characteristic amplitude peaks in the acoustic spectrum even in the subsonic regime.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2358 - 2363"},"PeriodicalIF":1.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Current Research to Substantiate Ways to Improve the Efficiency of Power Installations 提高电力装置效率途径的研究现状
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-10-18 DOI: 10.1134/S1063784224700701
O. V. Mitrofanova
{"title":"Current Research to Substantiate Ways to Improve the Efficiency of Power Installations","authors":"O. V. Mitrofanova","doi":"10.1134/S1063784224700701","DOIUrl":"10.1134/S1063784224700701","url":null,"abstract":"<p>The conducted research is designed to develop scientifically sound recommendations in order to optimize design and layout solutions that ensure increased energy efficiency and operability of energy-producing installations for various purposes. The mechanisms leading to the formation of stable vortex structures in internal turbulent swirl flows occurring in complex channels of power plants are considered. The effects associated with the manifestation of the swirl flow crisis are considered. It is shown that the generation of stable vortex formations in the equipment elements of power installations can be directly related to the mechanism of excitation of dangerous vibro-resonance effects. A method for intensifying heat transfer in steam generating channels is proposed. The question of choosing the criterion of thermohydraulic efficiency for solving optimization problems is considered.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2364 - 2371"},"PeriodicalIF":1.1,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Drag Force of a Hot Ball 热球的阻力
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-28 DOI: 10.1134/S106378422470066X
S. O. Gladkov
{"title":"On the Drag Force of a Hot Ball","authors":"S. O. Gladkov","doi":"10.1134/S106378422470066X","DOIUrl":"10.1134/S106378422470066X","url":null,"abstract":"<p>The paper provides a detailed solution to the problem of calculating the drag force of a hot ball moving in a viscous continuum. The problem is solved in the stationary case on time intervals when the heat exchange of the body with the environment does not lead to significant changes in its temperature. The limiting case is considered, when the Nusselt number is large (the thermal conductivity is small) and the temperature of the heated ball is considered constant together with the ambient temperature.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2339 - 2343"},"PeriodicalIF":1.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Generalization of the Stokes Formula 关于Stokes公式的推广
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-28 DOI: 10.1134/S1063784224700683
S. O. Gladkov
{"title":"On the Generalization of the Stokes Formula","authors":"S. O. Gladkov","doi":"10.1134/S1063784224700683","DOIUrl":"10.1134/S1063784224700683","url":null,"abstract":"<p>In this study, the Stokes formula permitting the calculation of the drag force for any spherical (including inhomogeneous) bodies is generalized. It is shown that in all physically interesting cases with different boundary conditions in the limiting transition to a homogeneous solid ball, the result is always the classical Stokes formula <span>(F = 6pi eta Ru)</span>.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2354 - 2357"},"PeriodicalIF":1.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Analytical Determination of the Best Form of Flows Past Bodies in a Viscous Continuum 粘性连续体中流过物体的最佳形式的解析确定
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-28 DOI: 10.1134/S1063784224700671
S. O. Gladkov, N. S. Nagibin
{"title":"On the Analytical Determination of the Best Form of Flows Past Bodies in a Viscous Continuum","authors":"S. O. Gladkov,&nbsp;N. S. Nagibin","doi":"10.1134/S1063784224700671","DOIUrl":"10.1134/S1063784224700671","url":null,"abstract":"<p>With the help of the Prandtl equation and using the methods of the variational calculus, we have obtained equations that make it possible to analytically determine the type of contour for which the drag force in a viscous flow past a body becomes the smallest. It is rigorously proved analytically that the longitudinal cross section of a cut of well-streamlined bodies can have different forms depending on the Reynolds number. The equations found are analyzed numerically and illustrated graphically.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2344 - 2353"},"PeriodicalIF":1.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Generalized Nonlinear Korteweg–De Vries Equation 广义非线性Korteweg-De Vries方程
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-28 DOI: 10.1134/S1063784224700658
S. O. Gladkov
{"title":"On the Generalized Nonlinear Korteweg–De Vries Equation","authors":"S. O. Gladkov","doi":"10.1134/S1063784224700658","DOIUrl":"10.1134/S1063784224700658","url":null,"abstract":"<p>With the help of the variational approach, a detailed derivation of a generalized dynamical equation is given in a particular case describing a soliton and a shock wave.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 8","pages":"2336 - 2338"},"PeriodicalIF":1.1,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrodynamic Analysis and Design of Bandpass Filters on Circular Waveguides 环形波导上带通滤波器的电动力学分析与设计
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070247
D. V. Lonkina, V. V. Zemlyakov, D. S. Gubsky, S. V. Krutiev, G. F. Zargano
{"title":"Electrodynamic Analysis and Design of Bandpass Filters on Circular Waveguides","authors":"D. V. Lonkina,&nbsp;V. V. Zemlyakov,&nbsp;D. S. Gubsky,&nbsp;S. V. Krutiev,&nbsp;G. F. Zargano","doi":"10.1134/S1063784224070247","DOIUrl":"10.1134/S1063784224070247","url":null,"abstract":"<p>The possibility of using a circular waveguide with radial ridges and ring-shaped segments of finite thickness as resonant diaphragms in the synthesis of bandpass cylindrical waveguide filters is shown. The analysis of the electrodynamic parameters dependences on diaphragms geometrical dimensions has been carried out. Filters were synthesized and compared with experimental data.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2020 - 2023"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research of Feedforward Neural Network Applicability in Computer Simulation of Polymers 前馈神经网络在聚合物计算机仿真中的应用研究
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070429
D. V. Shein, D. V. Zav’yalov, V. I. Konchenkov
{"title":"Research of Feedforward Neural Network Applicability in Computer Simulation of Polymers","authors":"D. V. Shein,&nbsp;D. V. Zav’yalov,&nbsp;V. I. Konchenkov","doi":"10.1134/S1063784224070429","DOIUrl":"10.1134/S1063784224070429","url":null,"abstract":"<p>In this paper we investigate the adequacy of deep learning force field models for modeling amorphous bodies. A polymer with the studied physical properties, polyphenylene sulfide, was chosen as a test substance. The simulation results shows that the forces predicted by neural networks acting on polymer atoms are significantly different from the forces calculated by ab initio molecular dynamics methods. A qualitative comparison with the force field model of a simpler compound, black phosphorene, shows that feedforward neural networks are unsuitable for modeling complex amorphous substances.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2123 - 2126"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Processes of Ablation and Structures Growth under the Action of Femtosecond Laser Pulses on the Gallium Surface in an Ammonia Medium 氨介质中镓表面在飞秒激光脉冲作用下的烧蚀和结构生长过程
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S106378422407020X
D. A. Kochuev, A. S. Chernikov, D. V. Abramov, A. A. Voznesenskaya, R. V. Chkalov, K. S. Khorkov
{"title":"Processes of Ablation and Structures Growth under the Action of Femtosecond Laser Pulses on the Gallium Surface in an Ammonia Medium","authors":"D. A. Kochuev,&nbsp;A. S. Chernikov,&nbsp;D. V. Abramov,&nbsp;A. A. Voznesenskaya,&nbsp;R. V. Chkalov,&nbsp;K. S. Khorkov","doi":"10.1134/S106378422407020X","DOIUrl":"10.1134/S106378422407020X","url":null,"abstract":"<p>In this paper, we present the results of processing metallic gallium in an ammonia vapor medium at 2 bar pressure by femtosecond laser pulses. The influence of the ammonia concentration and the mode of laser beam scanning on the result of laser action is considered. It has been established that an increase in the concentration of ammonia vapor and a change in the scanning regime lead to a radical change in the laser ablation process. A decrease in the scanning speed leads to the cessation of the ablation process and the development of the nitridation process of the gallium surface, accompanied by the formation of columnar structures up to 12 mm long and about 100 μm in diameter. The synthesized nanoparticles and structures were studied using scanning electron microscopy, Raman spectroscopy, and X-ray analysis.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1997 - 2004"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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