发布求助
文献互助 智能选刊 最新文献

Doklady Physics最新文献

筛选
英文 中文
Aerodynamic Heating of a Blunted Plate in the Regime of Strong Viscous–Inviscid Interaction 钝板在强粘-无粘相互作用下的气动加热
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120011
N. I. Batura, G. N. Dudin
{"title":"Aerodynamic Heating of a Blunted Plate in the Regime of Strong Viscous–Inviscid Interaction","authors":"N. I. Batura,&nbsp;G. N. Dudin","doi":"10.1134/S1028335822120011","DOIUrl":"10.1134/S1028335822120011","url":null,"abstract":"<p>The heating of the surface of a blunted plate made of a material with low thermal conductivity is experimentally investigated in a wind tunnel under the strong interaction regime. The flow in the boundary layer on the plate is nonstationary, since the temperature of the plate surface continuously increases during the start-up, and its distribution over the surface is variable. The installation of a wedge in the vicinity of the trailing edge of the plate leads to changes in the area of the perturbed flow and in the temperature distribution on the surface of the plate in front of it up to the leading edge as compared to the case of flow around a plate without a wedge. These changes are explained by the propagation of pressure perturbations caused by the installation of the wedge along the subsonic part of the boundary layer against the flow.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 12","pages":"477 - 479"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941337","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
Setting of Requirements for Steam-Explosion Plants 蒸汽爆炸装置要求的设定
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110039
O. R. Ganiev, I. N. Grishnyaev
{"title":"Setting of Requirements for Steam-Explosion Plants","authors":"O. R. Ganiev,&nbsp;I. N. Grishnyaev","doi":"10.1134/S1028335822110039","DOIUrl":"10.1134/S1028335822110039","url":null,"abstract":"<p>Based on the analysis of the physical processes that occur during a steam explosion, it is shown that, in plants of this type, it is necessary to provide the homogeneous-nucleation mode with the fluctuation frequency of formation of viable vapor-phase nuclei in the unit volume of liquid of at least 10<sup>8</sup> m<sup>–3</sup> s<sup>–1</sup> and the relative value of liquid overheating of ~1. On the basis of a standard autoclave, a steam-explosion plant that meets the specified requirements is designed and manufactured.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"472 - 474"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4940968","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
Selective Laser Heating of Closed Cavity Shells Filled with Liquid 液体填充封闭腔壳的激光选择性加热
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120047
S. N. Mokrin, M. A. Guzev, D. A. Tereshko, A. V. Kulik, S. S. Minaev, I. A. Abushkin, V. M. Chudnovsky
{"title":"Selective Laser Heating of Closed Cavity Shells Filled with Liquid","authors":"S. N. Mokrin,&nbsp;M. A. Guzev,&nbsp;D. A. Tereshko,&nbsp;A. V. Kulik,&nbsp;S. S. Minaev,&nbsp;I. A. Abushkin,&nbsp;V. M. Chudnovsky","doi":"10.1134/S1028335822120047","DOIUrl":"10.1134/S1028335822120047","url":null,"abstract":"<p>A method for selective heating of a cavity shell filled with liquid using heated submerged jets generated by laser heating of a liquid at the end of an optical fiber introduced into the cavity is investigated. It is experimentally shown that the jets, passing through the “cold” surrounding liquid, collide with the shell and heat it, while the temperature of the surrounding liquid rises insignificantly. Numerical simulation of this process allows us to estimate the heating time of closed shells to the temperature of thermal modification of the walls of pathological objects and sanitation of surfaces depending on the power of laser radiation. It is important to consider the obtained result during laser-induced precision cleaning and sanitation of surfaces in closed volumes when developing medical technologies for laser surgical treatment of pathologically altered vessels, cysts, and other applications.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 12","pages":"491 - 494"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941226","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
Traveling Waves in Nondispersive Strongly Inhomogeneous Media 非色散强非均匀介质中的行波
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100081
E. N. Pelinovsky, O. V. Kaptsov
{"title":"Traveling Waves in Nondispersive Strongly Inhomogeneous Media","authors":"E. N. Pelinovsky,&nbsp;O. V. Kaptsov","doi":"10.1134/S1028335822100081","DOIUrl":"10.1134/S1028335822100081","url":null,"abstract":"<p>Methods to obtain solutions describing traveling waves in strongly inhomogeneous media are discussed within a linear wave equation with a variable speed (speed of sound). It is shown that there is a wide range of propagation speed variations that allow for the existence of waves that do not reflect despite the strong inhomogeneity of the medium. In this case, the shape of the wave and its characteristics change with distance. These waves can transfer energy over long distances without loss.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"415 - 419"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4939467","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
Energy, Demography, and Climate: Is There an Alternative to Abandoning Fossil Fuels? 能源、人口和气候:放弃化石燃料还有别的选择吗?
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S102833582210007X
V. V. Klimenko,  A. V. Klimenko, O. V. Mikushina, A. G. Tereshin
{"title":"Energy, Demography, and Climate: Is There an Alternative to Abandoning Fossil Fuels?","authors":"V. V. Klimenko,&nbsp; A. V. Klimenko,&nbsp;O. V. Mikushina,&nbsp;A. G. Tereshin","doi":"10.1134/S102833582210007X","DOIUrl":"10.1134/S102833582210007X","url":null,"abstract":"<p>Alternative scenarios for the development of world energy, based on low options for the change in the population of the planet, are being explored from the point of view of preventing dangerous global climate change. It has been shown that in order to keep the increase in the average global temperature within safe limits while maintaining the current growth rates of energy consumption and the population of the planet, a radical restructuring of the world energy industry is necessary—the “great energy transition”—with a complete rejection of the use of fossil fuels in the coming decades, which seems impossible given the inertia of development and spread of energy technologies. Using the author’s approaches to forecasting the volume and structure of world energy consumption, alternative scenarios for carbon dioxide emissions have been formed in the implementation of low, but quite realistic trends for demographic dynamics. Based on simulations of models of the global carbon cycle and climate, it is shown that the development of natural demographic processes is able to restrain growth and ensure a further decrease in the concentration of carbon dioxide in the Earth’s atmosphere, limiting the increase in the average global temperature to a completely safe level of 1.8 degrees compared to the pre-industrial period without large-scale restructuring of the world energy.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"433 - 438"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289389","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: 1
Heat Transfer Processes at Early Stages of Crystal Nucleation in Glass-Forming Materials and Polymers 玻璃成形材料和聚合物晶体成核初期的传热过程
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110064
A. A. Minakov
{"title":"Heat Transfer Processes at Early Stages of Crystal Nucleation in Glass-Forming Materials and Polymers","authors":"A. A. Minakov","doi":"10.1134/S1028335822110064","DOIUrl":"10.1134/S1028335822110064","url":null,"abstract":"<p>Local thermal perturbations in supercooled glass-forming liquids during the nucleation and decay of nuclei of the crystalline phase are analyzed. The nonequilibrium thermal response of glass-forming materials to fast local thermal perturbations is described using an integral equation with dynamic heat capacity. It is shown that local thermal perturbations associated with the formation of nuclei of the crystalline phase significantly affect the nucleation rate in supercooled glass-forming liquids. The obtained fundamental knowledge can be useful for the technology of new nanostructured materials, polymers and nanocomposites.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"459 - 464"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4944644","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
The Giant Effect of Nonreciprocity for the Microwave Magnetoresistance of (CoFe)/Cu Superlattices 非互易性对(CoFe)/Cu超晶格微波磁电阻的巨大影响
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100093
V. V. Ustinov,  A. B. Rinkevich, M. A. Milyaev, E. A. Kuznetsov, D. V. Perov
{"title":"The Giant Effect of Nonreciprocity for the Microwave Magnetoresistance of (CoFe)/Cu Superlattices","authors":"V. V. Ustinov,&nbsp; A. B. Rinkevich,&nbsp;M. A. Milyaev,&nbsp;E. A. Kuznetsov,&nbsp;D. V. Perov","doi":"10.1134/S1028335822100093","DOIUrl":"10.1134/S1028335822100093","url":null,"abstract":"<p>The giant microwave magnetoresistance effect for the reflection of waves from the superlattice (CoFe)/Cu-substrate system is investigated. The reflection–coefficient dependence on the strength of the magnetic field is measured within the frequency range of 26–38 GHz. The nonreciprocity of the wave reflection is revealed, which can enhance the giant effect of microwave magnetoresistance.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"420 - 423"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289393","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
Change of Orientation of a Body by Means of Three Pairs of Movable Masses 用三对可移动的质量来改变物体的方向
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100020
F. L. Chernousko
{"title":"Change of Orientation of a Body by Means of Three Pairs of Movable Masses","authors":"F. L. Chernousko","doi":"10.1134/S1028335822100020","DOIUrl":"10.1134/S1028335822100020","url":null,"abstract":"<p>A new method for changing the spatial orientation of a rigid body by means of several movable point masses is proposed. It is assumed that these masses form three pairs, and the masses of each pair move symmetrically to each other. It is shown that, under the assumptions made, any given motion of the body can be implemented, including a plane rotation around an arbitrary axis. Two versions of the algorithm are proposed.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"428 - 432"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289394","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
A Thermal Protective Respirator Based on Granular Phase Change Materials 基于颗粒相变材料的热防护呼吸器
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120035
N. A. Lutsenko, S. S. Fetsov
{"title":"A Thermal Protective Respirator Based on Granular Phase Change Materials","authors":"N. A. Lutsenko,&nbsp;S. S. Fetsov","doi":"10.1134/S1028335822120035","DOIUrl":"10.1134/S1028335822120035","url":null,"abstract":"<p>In this paper, we propose to use thermal-protective respirators based on granular phase change materials to protect the respiratory organs from dangerously high temperatures of inhaled air during fires and other emergencies. We demonstrate the possibility of creating such personal protective equipment based on known materials using a numerical experiment. In this case, the insignificant mass of the cooling element based on granular phase change material makes it possible to combine it with a gas and smoke protective element and create combined respirators that protect against both high temperatures and toxic combustion products.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 12","pages":"486 - 490"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941225","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
A New Type of Uncontrolled Multichannel Discharger for Nanosecond Switching of Megaampere Currents 一种用于毫安电流纳秒开关的新型无控多通道放电装置
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100044
E. A. Galanova, Yu. N. Dolin, A. V. Ivanovsky, A. E. Kalinychev, G. V. Karpov, S. S. Lomtev, A. G. Merzlov, V. N. Nudikov, D. S. Prokhorov, E. A. Salatov, A. N. Turov, A. A. Shatalin
{"title":"A New Type of Uncontrolled Multichannel Discharger for Nanosecond Switching of Megaampere Currents","authors":"E. A. Galanova,&nbsp;Yu. N. Dolin,&nbsp;A. V. Ivanovsky,&nbsp;A. E. Kalinychev,&nbsp;G. V. Karpov,&nbsp;S. S. Lomtev,&nbsp;A. G. Merzlov,&nbsp;V. N. Nudikov,&nbsp;D. S. Prokhorov,&nbsp;E. A. Salatov,&nbsp;A. N. Turov,&nbsp;A. A. Shatalin","doi":"10.1134/S1028335822100044","DOIUrl":"10.1134/S1028335822100044","url":null,"abstract":"<p>A multichannel uncontrolled discharger based on staged breakdown of a multilayer film insulator with an enclosed foil plate under floating potential has been developed. An abrupt change in the foil potential after a single-channel initial self-breakdown between the foil and one of the electrodes leads to a multi-channel secondary breakdown between the foil and the other electrode. Cumulative plasma jets are generated in places of breakdown and they initiate the formation of the through current channels between the electrodes at the third stage of the breakdown. The developed multichannel discharger has a nanosecond response time and can be used to sharpen the voltage pulse front in the electric-discharge devices with megaampere currents. A similar method of formation of a multichannel breakdown can be used in the development of nanosecond switches of multimegaampere currents in the directions of thermonuclear research with the use of explosive magnetic energy generators.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"405 - 409"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4945053","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信