发布求助
文献互助 智能选刊 最新文献

Technical Physics最新文献

筛选
英文 中文
Analysis of the Thermal Conditions in a Lithium-Ion Battery Pack at Reduced Heat Exchange Rate with the Environment
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S106378422470083X
G. V. Kuznetsov, E. V. Kravchenko
{"title":"Analysis of the Thermal Conditions in a Lithium-Ion Battery Pack at Reduced Heat Exchange Rate with the Environment","authors":"G. V. Kuznetsov,&nbsp;E. V. Kravchenko","doi":"10.1134/S106378422470083X","DOIUrl":"10.1134/S106378422470083X","url":null,"abstract":"<p>The use of chemical current sources (CCS) in large stationary electrical energy storage systems (EES) is impossible without solving the problem of their thermal runaway. The runaway may be due to exponential temperature rise in major operating components of the battery. One of the factors that increase electrode and electrolyte temperature in a battery is its lower heat exchange with the environment. This study performs a numerical analysis of the thermal conditions in a Li-ion battery pack at moderate values of external factors affecting the thermal runaway and typical discharge rates for this type of CCS. Thermal resistance between Li-ion battery and the battery pack case was found to greatly reduce heat exchange with the environment. The temperature difference across the battery pack in a practically significant range of variables was from 2 to 16°С. At the same time, the characteristic temperature exceeded in a number of cases its regulated limit value, which created the risk of the battery’s thermal runaway.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2527 - 2534"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404151","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
Study of Heat Transfer of a Concave Surface of Short Annular Channels under Impact Jets
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700920
Yu. L. Leukhin, P. D. Alekseev
{"title":"Study of Heat Transfer of a Concave Surface of Short Annular Channels under Impact Jets","authors":"Yu. L. Leukhin,&nbsp;P. D. Alekseev","doi":"10.1134/S1063784224700920","DOIUrl":"10.1134/S1063784224700920","url":null,"abstract":"<p>By means of physical and mathematical modeling, convective heat transfer and resistance of an annular channel under jet air impingement on the outer concave surface were investigated. It has been established that, in the studied ranges of variation of geometric and mode characteristics, heat transfer and aerodynamics of short annular channels are determined by the dimensionless parameter <i>A</i><sub><i>f</i></sub>, which is the ratio of the total area of the blowout holes to the area of the blown surface. To ensure uniform heat transfer on the concave surface of the channels, it is advisable to use internal perforated pipes with a value of the parameter <i>A</i><sub><i>f</i></sub> less than 0.01, and to control heat transfer and intensify it in the required zones, it is possible to use pipes with its higher values. The resistance coefficient of the device decreases with increasing parameter <i>A</i><sub><i>f</i></sub> and increases slightly with decreasing Reynolds number. An equation has been obtained for calculating the average heat transfer over the surface, the dimensionless total pressure drop in the device, and the total resistance coefficient in the following ranges of variation of mode and geometric parameters: Re = 873–19.7 × 10<sup>3</sup>, <i>A</i><sub><i>f</i></sub> = (0.94–42.57) × 10<sup>–3</sup>, <i>S</i>/<i>d</i><sub>c</sub> = 3.49–24.92, and <i>h</i>/<i>d</i><sub>c</sub> = 4.5–8.1. Assessment of the heat exchange device using the energy efficiency coefficient showed that its optimal value is observed at values of the parameter <i>A</i><sub><i>f</i></sub> approximately equal to 0.035–0.040.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2535 - 2546"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404221","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
Vortices Formation and the Condensate Film Surface Shape in Heat Pipes
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700841
A. V. Seryakov
{"title":"Vortices Formation and the Condensate Film Surface Shape in Heat Pipes","authors":"A. V. Seryakov","doi":"10.1134/S1063784224700841","DOIUrl":"10.1134/S1063784224700841","url":null,"abstract":"<p>The results of numerical and experimental studies of vortex formation near the condensation surface and the shape of the surface of moving condensate film in short linear heat pipes (HP’s) with a Laval nozzle-liked vapour channel are presented.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2583 - 2595"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404217","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
Analysis of the Oxide Target Cooling Modes in the Production of Iodine Isotopes
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700816
S. S. Salodkin, Yu. I. Tyurin, V. V. Sokhoreva
{"title":"Analysis of the Oxide Target Cooling Modes in the Production of Iodine Isotopes","authors":"S. S. Salodkin,&nbsp;Yu. I. Tyurin,&nbsp;V. V. Sokhoreva","doi":"10.1134/S1063784224700816","DOIUrl":"10.1134/S1063784224700816","url":null,"abstract":"<p>To ensure the maximal possible production intensity for iodine-based radiopharmaceuticals, various methods for target cooling (e.g., front-side cooling of ТеО<sub>2</sub> target using air, helium, and fine-dispersed water flow) have been investigated. Using the COMSOL Multiphysics simulation software package, the temperature field of the target cooled by different heat carriers have been compared for the production output of iodine.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2574 - 2582"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404223","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
Investigation of MHD Heat Exchange in a Liquid Metal Flow through a Tube-in-Channel System under Conditions Close to the Thermonuclear Reactor Blanket Module
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700774
N. A. Luchinkin, N. G. Razuvanov, O. N. Polyanskaya, I. O. Teplyakov
{"title":"Investigation of MHD Heat Exchange in a Liquid Metal Flow through a Tube-in-Channel System under Conditions Close to the Thermonuclear Reactor Blanket Module","authors":"N. A. Luchinkin,&nbsp;N. G. Razuvanov,&nbsp;O. N. Polyanskaya,&nbsp;I. O. Teplyakov","doi":"10.1134/S1063784224700774","DOIUrl":"10.1134/S1063784224700774","url":null,"abstract":"<p>Heat exchange in a liquid metal upward flow through a tube-in-channel system has been studied experimentally and analytically. The system consists of a vertical tube passing along the axis of a square heated channel that is connected to a natural circulation loop. Experiments have been conducted in the presence of a transverse magnetic field and without it. Probe measurements using longitudinal microthermocouple probes placed both in the tube and in the channel gap have been applied. Heat exchange averaged characteristics have been numerically simulated for experimental conditions. Three basic operating conditions of the cooling loop have been considered: the loop is shut off, the loop is open allowing free circulation in the gap without cooling, and the loop is open and provides cooling. In experiments, the profiles of averaged temperature, the distributions of heat transfer local coefficients, and the pulsation characteristics of flow temperature both in the tube and in the channel gap have been obtained. Calculation data have been compared with experimental results. It has been found that the configuration and structure of the flow significantly depend on the presence of transverse magnetic field and on whether the natural circulation loop is connected and provides cooling.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 9","pages":"2461 - 2471"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404157","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
Specific Features of the Breakup of Hot Liquid Metal Droplets Falling into Cold Water
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700828
Yu. P. Ivochkin, S. M. Yudin, T. I. Borodina
{"title":"Specific Features of the Breakup of Hot Liquid Metal Droplets Falling into Cold Water","authors":"Yu. P. Ivochkin,&nbsp;S. M. Yudin,&nbsp;T. I. Borodina","doi":"10.1134/S1063784224700828","DOIUrl":"10.1134/S1063784224700828","url":null,"abstract":"<p>The paper presents experimental data of pressure pulses generated by the interaction of liquid Bi, Sn, and Pb with water at room temperature (18°C). The resultant pressure relationships are compared with findings of video recording and with the morphology of crystallized fragmentation products, which allowed to propose an appropriate scenario for the explosive fragmentation process development. Experiments were performed in the ranges of initial temperature and investigated melt mass of 400 to 900°C and 3 to 15 g, respectively. It was confirmed that the explosive fragmentation of hot liquid metal droplets falling into room temperature water produce materials with amorphous structure. It is shown using liquid bismuth as an example that the amorphousness of a material can increase as its volume grows.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2517 - 2526"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404262","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
Impact of Subcooled Liquid Jet on the Dynamics of Transition from Steady Film Boiling to Intense Heat Transfer Regime
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700804
T. A. Gubanova, P. K. Kanin, V. V. Yagov, A. R. Zabirov, I. A. Molotova, M. M. Vinogradov
{"title":"Impact of Subcooled Liquid Jet on the Dynamics of Transition from Steady Film Boiling to Intense Heat Transfer Regime","authors":"T. A. Gubanova,&nbsp;P. K. Kanin,&nbsp;V. V. Yagov,&nbsp;A. R. Zabirov,&nbsp;I. A. Molotova,&nbsp;M. M. Vinogradov","doi":"10.1134/S1063784224700804","DOIUrl":"10.1134/S1063784224700804","url":null,"abstract":"<p>The properties of the cooled surface and of liquid coolant significantly affect the heat transfer intensity during film boiling and the temperature of transition to the intense regime. As a result, many current studies are devoted to unsteady cooling of vertical cylinders and balls made of various metals with and without coating. The impact of an effectively point source of perturbation (such as, for example, a submerged jet) on the vapor film during film boiling is also of genuine interest. This paper presents experimental results of cooling a stainless steel ball in a liquid when exposed to a submerged jet of the same liquid. The aim of the study is to experimentally measure the surface temperature during the transition from steady film boiling to the intense heat transfer regime of boiling. Different cooling liquids were used in the experiments including water, ethanol, water-ethanol mixtures, and perfluorohexane. It is shown that the transition to the intense mode of heat transfer occurs in aqueous liquids significantly earlier than in liquids with high alcohol content. Despite the influence of the submerged jet, there was no intense heat transfer regime during film boiling in perfluorohexane.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2510 - 2516"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404226","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
Modification of Polymeric and Composite Materials in Supercritical Fluids
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700956
A. D. Sabirova, R. R. Antipov, T. R. Bilalov
{"title":"Modification of Polymeric and Composite Materials in Supercritical Fluids","authors":"A. D. Sabirova,&nbsp;R. R. Antipov,&nbsp;T. R. Bilalov","doi":"10.1134/S1063784224700956","DOIUrl":"10.1134/S1063784224700956","url":null,"abstract":"<p>The article presents a brief review of the most important properties of supercritical fluids, in particular, supercritical carbon dioxide. The methods of modification of polymeric and composite materials are considered. Analysis of literature on the methods for materials modification using supercritical fluid media shows their high efficiency of obtaining complex polymer compositions and their processing in order to impart additional properties to them.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 10","pages":"2571 - 2573"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404218","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
Investigation of the Efficiency of a Two-Stage Isobutane Heat Pump
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700786
M. S. Purdin, V. V. Yuzyuk
{"title":"Investigation of the Efficiency of a Two-Stage Isobutane Heat Pump","authors":"M. S. Purdin,&nbsp;V. V. Yuzyuk","doi":"10.1134/S1063784224700786","DOIUrl":"10.1134/S1063784224700786","url":null,"abstract":"<p>The paper substantiates the relevance of studying the methods for improving the efficiency of heat pumps. Two schemes of two-stage heat pumps and models for them are developed, which permitted calculating the thermal characteristics of cycles. The schemes differ by the presence of a supercooler for condensate. Conclusions are made about the advantages of isobutane as a working fluid over other substances. Maps of modes for the calculated coefficient of thermal transformation are constructed. It is shown that two-stage pumps have a higher coefficient of transformation than single-stage ones. The presence of supercoolers increases the transformation coefficient for both single-stage and two-stage heat pumps. It is found that the coefficient of thermal transformation of the second stage increases with an increase in the temperature difference between the freon temperature at the inlet to the second-stage compressor and the condenser temperature of the second stage.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 9","pages":"2472 - 2481"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404198","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
Algorithm of the Search for Inhomogeneities in the Inverse Nonlinear Diffraction Problems
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-02-13 DOI: 10.1134/S1063784224700749
A. O. Lapich, M. Yu. Medvedik
{"title":"Algorithm of the Search for Inhomogeneities in the Inverse Nonlinear Diffraction Problems","authors":"A. O. Lapich,&nbsp;M. Yu. Medvedik","doi":"10.1134/S1063784224700749","DOIUrl":"10.1134/S1063784224700749","url":null,"abstract":"<p>This study is aimed at the solution of the inverse problem used for determining the inhomogeneity of an object. The scattered field is measured beyond its limits with a certain set of observation points. It is assumed that the radiation source and the observation points are located outside the object under investigation. The scattered field is modeled as the result of solution of the direct problem. For solving the inverse problem, a two-step method is employed. The application of various types of nonlinearities is considered. The computational grid is introduced using the generalized grid method. A numerical method for solving this problem is proposed and implemented. The numerical results reported here demonstrate the solution to the problem for preset experimental data.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 9","pages":"2454 - 2460"},"PeriodicalIF":1.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404225","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 下一页 尾页
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