发布求助
文献互助 智能选刊 最新文献

Thermophysics and Aeromechanics最新文献

筛选
英文 中文
Mesoscopic-scale modeling of three-phase processes in porous media 多孔介质中三相过程的介观尺度模拟
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020034
K. V. Novoselov
{"title":"Mesoscopic-scale modeling of three-phase processes in porous media","authors":"K. V. Novoselov","doi":"10.1134/S0869864326020034","DOIUrl":"10.1134/S0869864326020034","url":null,"abstract":"<div><p>The paper presents a numerical model for multiphase immiscible flows in porous media which is based on the lattice Boltzmann method (LBM) using a color gradient approach. This study accomplishes an algorithm of assigning the arbitrary contact angles at the interfaces with a solid surface. This model was tested against the Laplace law and the liquid lens geometry for the cases of two- and three-phase systems. Numerical simulation was applied to the oil displacement phenomenon in a digital core model derived from X-ray micro-computed tomography data. This gives a correct saturation distribution which accounts for the effects of capillary trapping and viscous fingering. The developed approach can be applied for analysis and optimization of petroleum production, study of the residual saturation and carbon dioxide storage in subsurface reservoirs.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"235 - 250"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Segregation in ternary lithium-potassium-lead liquid alloys 三元锂钾铅液态合金中的偏析
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020046
R. N. Abdullaev, R. A. Khairulin, A. Sh. Agazhanov, S. V. Stankus
{"title":"Segregation in ternary lithium-potassium-lead liquid alloys","authors":"R. N. Abdullaev,&nbsp;R. A. Khairulin,&nbsp;A. Sh. Agazhanov,&nbsp;S. V. Stankus","doi":"10.1134/S0869864326020046","DOIUrl":"10.1134/S0869864326020046","url":null,"abstract":"<div><p>Segregation in melts of the Li-K-Pb system was studied in the temperature range of 941–1187 K using the gamma-ray attenuation technique. It was shown that the addition of 28.6 at. % Pb to the liquid Li-K system is insufficient to exit the immiscibility region, the boundaries of which remain unknown. The profiles of the gamma-ray linear attenuation coefficient in liquid Li<sub>4</sub>KPb<sub>2</sub> and Li<sub>16</sub>K<sub>3</sub>Pb<sub>7</sub> alloys were studied at two temperatures. It was shown that, upon cooling, homogeneous Li<sub>4</sub>KPb<sub>2</sub> and Li<sub>16</sub>K<sub>3</sub>Pb<sub>7</sub> melts reach the immiscibility region at temperatures of approximately 1045 and 1063 K, respectively.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"251 - 257"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of the diffuser divergence angle on characteristics of turbulent flow with different swirl intensity 扩散器散度角对不同旋流强度湍流特性的影响
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020149
D. A. Suslov, S. G. Skripkin, S. I. Shtork
{"title":"Effect of the diffuser divergence angle on characteristics of turbulent flow with different swirl intensity","authors":"D. A. Suslov,&nbsp;S. G. Skripkin,&nbsp;S. I. Shtork","doi":"10.1134/S0869864326020149","DOIUrl":"10.1134/S0869864326020149","url":null,"abstract":"<div><p>The effect of the conical diffuser divergence angle and the flow swirl intensity on the characteristics of turbulent flow and the precessing vortex core that forms within it was studied experimentally. Laser Doppler anemometry was used to analyze the flow. It is shown that the effects associated with changes in the diffuser divergence angle depend significantly on the swirl intensity. With strong swirl, nonmonotonic behavior of the integral swirl number in the far wake of the flow was observed, which is interpreted as a change in flow modes. Increasing the divergence angle intensifies velocity pulsations associated with vortex precession. The obtained results form the basis for validating computational models and optimizing diffusers in power plants.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"355 - 365"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation study on combined combustion of diesel and pulverized coal fuels in a small-sized furnace 小型炉内柴油与煤粉混合燃烧的模拟研究
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020095
A. A. Dekterev, Ar. A. Dekterev, V. A. Kuznetsov, E. S. Tepfer, E. Yu. Shadrin
{"title":"Simulation study on combined combustion of diesel and pulverized coal fuels in a small-sized furnace","authors":"A. A. Dekterev,&nbsp;Ar. A. Dekterev,&nbsp;V. A. Kuznetsov,&nbsp;E. S. Tepfer,&nbsp;E. Yu. Shadrin","doi":"10.1134/S0869864326020095","DOIUrl":"10.1134/S0869864326020095","url":null,"abstract":"<div><p>The paper presents numerical simulation on co-combustion of diesel fuel and pulverized coal in a small-sized furnace equipped with oil-steam burner. A comprehensive mathematical model is presented that describes heat and mass transfer in the burning and furnace apparatuses: diesel fuel evaporation under the steam jet impact, turbulent combustion of evaporated diesel, combustion of coal particles. Simulation demonstrated that the available combustion chamber with an oil-stream burner enables combustion of micronized coal and ensures stable operation for a broad range of coal flow rates. The recent results of numerical simulation can be used for designing small furnaces for flare-mode combustion of micronized coal.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"305 - 314"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Supersonic turbulent boundary layer under conditions of distributed positive air mass transfer through a permeable surface 分布正空气质量通过可渗透表面条件下的超音速湍流边界层
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020058
V. I. Kornilov, A. S. Shmakov
{"title":"Supersonic turbulent boundary layer under conditions of distributed positive air mass transfer through a permeable surface","authors":"V. I. Kornilov,&nbsp;A. S. Shmakov","doi":"10.1134/S0869864326020058","DOIUrl":"10.1134/S0869864326020058","url":null,"abstract":"<div><p>The paper presents experimental study on efficiency of controlling a supersonic turbulent boundary layer on a flat surface by positive-directed air mass transfer via a finely perforated wall. Experiments were performed for a flow with Mach number 2 and the unit Reynolds number equal 12.5·10<sup>6</sup> m<sup>−1</sup>. The mass transfer intensity was varied in the interval from 0 to 0.00941. There is a significant effect of mass transfer on the skin friction coefficient: the end of active control zone demonstrates a reduction in friction by 80 % as compared to baseline data. It was discovered that the spontaneous mass transfer (due to a natural difference between the barometric pressure and static pressure in the test section) can provide a considerable reduction in the skin friction coefficient down to the zero level by the end of the control zone.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"259 - 269"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Liquid film thickness in a flat minichannel in turbulent gas-liquid film flow 湍流气液膜流动中平坦小通道内液膜厚度
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020125
A. S. Mungalov, D. Yu. Kochkin, O. A. Kabov
{"title":"Liquid film thickness in a flat minichannel in turbulent gas-liquid film flow","authors":"A. S. Mungalov,&nbsp;D. Yu. Kochkin,&nbsp;O. A. Kabov","doi":"10.1134/S0869864326020125","DOIUrl":"10.1134/S0869864326020125","url":null,"abstract":"<div><p>This work deals with an experimental study of the thickness of a water film driven by a turbulent gas flow in a flat minichannel. It has been found that the transition from macro- to minichannels can lead to a significant reduction in film thickness under comparable parameters. An existing model for estimating the average liquid film thickness in a turbulent gas-liquid film flow in a flat minichannel was modified.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"331 - 337"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature distribution over the surface of a thin water droplet on a structured surface at slight underheating 在轻微欠加热的情况下，结构表面上的薄水滴表面的温度分布
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-07-25 DOI: 10.1134/S0869864326010099
Yu. A. Peschenyuk, G. Y. Ayvazyan, E. Ya. Gatapova
{"title":"Temperature distribution over the surface of a thin water droplet on a structured surface at slight underheating","authors":"Yu. A. Peschenyuk,&nbsp;G. Y. Ayvazyan,&nbsp;E. Ya. Gatapova","doi":"10.1134/S0869864326010099","DOIUrl":"10.1134/S0869864326010099","url":null,"abstract":"<div><p>The dynamics of droplet surface temperature was studied for a sessile water droplet on a structured black silicon substrate that was heated to 90°C. The wetting properties of black silicon were analyzed during substrate heating in the temperature range of 30–90°C. IR thermography revealed that nucleation sites form at temperatures close to the boiling point at the liquid–black silicon interface. The dynamics of surface temperature changes for a thin liquid droplet during the final stages of evaporation was also examined, including the formation and subsequent development of bubble nuclei within the droplet. It is shown that convection and bubble formation causes temperature field nonuniformity.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 1","pages":"75 - 83"},"PeriodicalIF":0.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Steam conversion of carbon monoxide in an annular microchannel 一氧化碳在环形微通道中的蒸汽转化
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-07-25 DOI: 10.1134/S0869864326010130
S. V. Dimov, O. A. Gasenko
{"title":"Steam conversion of carbon monoxide in an annular microchannel","authors":"S. V. Dimov,&nbsp;O. A. Gasenko","doi":"10.1134/S0869864326010130","DOIUrl":"10.1134/S0869864326010130","url":null,"abstract":"<div><p>To create an efficient microchannel reactor for hydrogen production, steam reforming of carbon monoxide in a slotted annular channel was experimentally studied. The microchannel reactor is formed by a submillimeter gap between two cylinders, with a catalyst applied to the outer side of the inner cylinder. Platinum applied to cerium oxide was used as a catalyst. The thermal characteristics of the shift reaction with the formation of carbon dioxide and hydrogen were experimentally studied. Experiments were carried out at a steam-to-carbon monoxide ratio of 3:1 at different mixture flow rates. It was shown that a fourfold increase in the mixture flow rate leads to a significant increase in the temperature difference between the reactor inlet and outlet, caused by the heat release of the reaction (from Δ<i>T</i> ≈ 20 °C at a contact time of 189 ms to 80 °C at a contact time of 46 ms). According to analysis of the composition of the outgoing gas, with an increase in the mixture flow rate, the degree of carbon monoxide conversion decreases significantly.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 1","pages":"109 - 113"},"PeriodicalIF":0.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 vaporization characteristics in two-phase thermosyphons 两相热虹吸管汽化特性研究
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-07-25 DOI: 10.1134/S0869864326010038
S. E. Shcheklein, L. O. Yakovlev
{"title":"Study of vaporization characteristics in two-phase thermosyphons","authors":"S. E. Shcheklein,&nbsp;L. O. Yakovlev","doi":"10.1134/S0869864326010038","DOIUrl":"10.1134/S0869864326010038","url":null,"abstract":"<div><p>Experimental data on the nature, thermophysical parameters, and boiling regimes of closed, two-phase, vacuum-sealed, water-filled thermosyphons are presented, and their potential applications are discussed. The high efficiency of thermosyphons in the slug and hyperslug regimes is experimentally confirmed.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 1","pages":"35 - 40"},"PeriodicalIF":0.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-excited and quasi-self-excited pitch-angle oscillations in a flow past a conical-spherical body at Mach number M = 1.75 马赫数M = 1.75时锥球体流动的自激和准自激俯仰角振荡
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-07-25 DOI: 10.1134/S0869864326010154
E. A. Chasovnikov
{"title":"Self-excited and quasi-self-excited pitch-angle oscillations in a flow past a conical-spherical body at Mach number M = 1.75","authors":"E. A. Chasovnikov","doi":"10.1134/S0869864326010154","DOIUrl":"10.1134/S0869864326010154","url":null,"abstract":"<div><p>A study on transition processes for experimental time dependencies of the pitch angle for a case of free rotation of a body discovered the final intervals with a steady amplitude of oscillations — known as quasi-self-excited oscillations. Statistical analysis demonstrated that the maximum possible difference between the amplitudes of self-excited oscillations (including the case of quasi-self-excited oscillations) at the normalized oscillation frequency of 0.02 was about 1 degree.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 1","pages":"121 - 130"},"PeriodicalIF":0.5,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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：604180095
Book学术官方微信
小红书