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Sea spray at extremely high wind speeds: generation mechanisms, contribution to atmosphere–ocean interactions, and role in sea hurricane dynamics 极高风速下的浪花：产生机制，对大气-海洋相互作用的贡献，以及在海上飓风动力学中的作用
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060155
Yu. I. Troitskaya, D. A. Sergeev, O. S. Ermakova, A. N. Zotova, M. I. Vdovin
{"title":"Sea spray at extremely high wind speeds: generation mechanisms, contribution to atmosphere–ocean interactions, and role in sea hurricane dynamics","authors":"Yu. I. Troitskaya,&nbsp;D. A. Sergeev,&nbsp;O. S. Ermakova,&nbsp;A. N. Zotova,&nbsp;M. I. Vdovin","doi":"10.1134/S0869864324060155","DOIUrl":"10.1134/S0869864324060155","url":null,"abstract":"<div><p>The presented research has made progress in describing sea spray and understanding the associated processes in terms of its physical properties, as well as the resulting fluxes from the ocean to the atmosphere, its influence on the development of ocean storms, and related problems and issues. The main results were obtained during laboratory experiments on wind-wave flumes using high-speed photography. Descriptions of studies related to the identification of the dominant type of spray generation (the bag-breakup type) and the statistics of these phenomena in a wide range of conditions depending on the wind-wave Reynolds number characterizing small-scale processes are given. Convolution of this statistics with the droplet size distribution from a single phenomenon of spray generation of the specified type, obtained from data of a special experiment, yields the spray generation function.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1245 - 1250"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145172","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
Linear thermal expansion coefficient of monocrystalline silicon 单晶硅的线性热膨胀系数
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060210
Yu. M. Kozlovskii, S. V. Stankus
{"title":"Linear thermal expansion coefficient of monocrystalline silicon","authors":"Yu. M. Kozlovskii,&nbsp;S. V. Stankus","doi":"10.1134/S0869864324060210","DOIUrl":"10.1134/S0869864324060210","url":null,"abstract":"<div><p>The paper presents the results of dilatometric measurements for thermal expansion of monocrystalline silicon for the temperature range of 100 – 1373 K. The temperature dependencies for thermal properties of material are calculated. The look-up tables for a wide temperature range for a solid state are calculated.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1289 - 1292"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144829","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
Method for simplified CFD simulation for pressure swirl nozzle atomization 压力旋流喷嘴雾化的简化CFD模拟方法
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060064
Ar. A. Dekterev, A. A. Dekterev
{"title":"Method for simplified CFD simulation for pressure swirl nozzle atomization","authors":"Ar. A. Dekterev,&nbsp;A. A. Dekterev","doi":"10.1134/S0869864324060064","DOIUrl":"10.1134/S0869864324060064","url":null,"abstract":"<div><p>A simple CFD modeling method is presented which is adapted for a problem of liquid atomization by a pressure swirl nozzle. The method is based on the VOF method and several assumptions; this approach enables calculating the spray characteristics during a reasonable computation time. The primary testing results confirmed the possibility of using this simulation method.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1171 - 1176"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145169","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
Analytical equation of state for liquid and gaseous nitrogen 液态氮和气态氮的状态解析方程
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060167
R. Kh. Bolotnova, E. F. Gainullina, E. A. Faizullina
{"title":"Analytical equation of state for liquid and gaseous nitrogen","authors":"R. Kh. Bolotnova,&nbsp;E. F. Gainullina,&nbsp;E. A. Faizullina","doi":"10.1134/S0869864324060167","DOIUrl":"10.1134/S0869864324060167","url":null,"abstract":"<div><p>Based on the previously developed method for constructing the equation of state (EOS) for liquid and vapor, the thermodynamically consistent analytical equation of state for liquid and gaseous nitrogen (in the molecular phase) is obtained. While constructing the equation of state, the Mie – Gruneisen form was used as a sum of potential and thermal components for pressure and internal energy. The potential components are described by a potential of the Born–Meyer type. For the thermal components, a simplifying approximation is adopted that follows from the condition for the constant average heat capacity and the dependence of Gruneisen function on the volume. When deriving the equation of state for nitrogen vapor and liquid phases, the tables calculated from equations approximating experimental data on isothermal compressibility, adiabatic speed of sound (including the critical region and phase equilibrium line) were used. The obtained equation of state for nitrogen can be useful in studying the phenomena associated with the processes of nitrogen evaporation and condensation in multiphase flows. This modeling takes into account the interfacial heat and mass transfer under conditions of low pressures and cryogenic temperatures.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1251 - 1258"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145173","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
Experimental study of the influence of blowing on changes in aerodynamic characteristics of a finite-size cylindrical body in a compressible flow 可压缩流动中吹气对有限尺寸圆柱体气动特性变化影响的实验研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060076
V. A. Kislovskiy, N. A. Ryabchenko, D. A. Semchenko
{"title":"Experimental study of the influence of blowing on changes in aerodynamic characteristics of a finite-size cylindrical body in a compressible flow","authors":"V. A. Kislovskiy,&nbsp;N. A. Ryabchenko,&nbsp;D. A. Semchenko","doi":"10.1134/S0869864324060076","DOIUrl":"10.1134/S0869864324060076","url":null,"abstract":"<div><p>Results of experimental measurements of aerodynamic forces acting on a finite-size cylindrical body in a compressible flow are reported. The flow around a transversely aligned cylinder and the influence of yaw angle variation in the interval <i>β</i> = 0 – 9° are studied. For each position of the cylinder, several locations of the blowing hole along the cylinder radius are considered. The force measurements are performed with the use of strain gauges. The changes in the drag force, lift force, yaw moment, and roll moment are investigated. New experimental data are obtained in the study on the influence of blowing on aerodynamic characteristics of a finite-size cylindrical body in a compressible flow. The data are analyzed and interpreted.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1177 - 1185"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144831","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
Intensification of heat transfer in a turbulent gas-droplet flow with peripheral swirling 外围旋流时湍流气滴流动中的传热强化
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S086986432406012X
M. A. Pakhomov, V. I. Terekhov
{"title":"Intensification of heat transfer in a turbulent gas-droplet flow with peripheral swirling","authors":"M. A. Pakhomov,&nbsp;V. I. Terekhov","doi":"10.1134/S086986432406012X","DOIUrl":"10.1134/S086986432406012X","url":null,"abstract":"<div><p>The effect of peripheral flow swirling in a cylindrical channel on the local flow structure and heat transfer in a turbulent gas-droplet flow was numerically studied with variations in the initial mass concentration of water droplets in the range <i>M</i><sub>L1</sub> = 0 – 0.1 and the initial droplet diameter <i>d</i><sub>1</sub> = 10 – 100 µm. It is shown that adding droplets leads to a significant increase in heat transfer (more than 2.5 times) in comparison with a single-phase swirling flow. The heat transfer patterns in gas-droplet flows with and without swirling are qualitatively similar. The effect of heat transfer intensification due to gas-droplet flow swirling reaches 50 % at <i>M</i><sub>L1</sub> = 0.1. Initially, with an increase in the droplet size, a significant intensification of heat transfer in the swirling flow occurs. Maximum heat transfer is obtained at <i>d</i><sub>1</sub> ≈ 50 µm for all swirling intensities of the two-phase flow. Then the value of heat transfer decreases and its dependence on the droplet size becomes more gradual.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1219 - 1226"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144835","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
Investigation of laminar flows of a chemically active gas-dust medium in a circular tube 化学活性气体-粉尘介质在圆管内层流的研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060131
E. E. Peskova, V. N. Snytnikov
{"title":"Investigation of laminar flows of a chemically active gas-dust medium in a circular tube","authors":"E. E. Peskova,&nbsp;V. N. Snytnikov","doi":"10.1134/S0869864324060131","DOIUrl":"10.1134/S0869864324060131","url":null,"abstract":"<div><p>Laminar flows of a gas-dust medium with chemical reactions in an axisymmetric tube are studied in detail through numerical experiments. The study focuses on non-oxidative reactions of catalytic synthesis of hydrocarbons from methane. The hot walls of the tube warm up a two-phase flow of methane and catalytic nanoparticles. Heating of this flow enables endothermic conversion of methane into hydrocarbons and hydrogen. The presence of catalytic nanoparticles in the tube, which activate heterogeneous-homogeneous reactions, causes a significant deviation of the two-phase medium flow from the Poiseuille flow profile known for a single-component gas due to changes in the medium volume and viscosity. The change in the heat regime along the tube with variation in thermal conductivity of the reactive medium is investigated. Calculations are conducted for various values of the wall temperature, particle concentration, laminar flow velocity, and other parameters. It is discovered that the medium velocity and the gas component distributions in the tube volume and at the tube outlet are strongly affected by the methane activation energy on the catalytic nanoparticle surface, particle diameter, and particle concentration.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1227 - 1238"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145179","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
On the correlation of emissivity with the characteristics of simple substances 发射率与简单物质特性的关系
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060088
D. V. Kosenkov, V. V. Sagadeev
{"title":"On the correlation of emissivity with the characteristics of simple substances","authors":"D. V. Kosenkov,&nbsp;V. V. Sagadeev","doi":"10.1134/S0869864324060088","DOIUrl":"10.1134/S0869864324060088","url":null,"abstract":"<div><p>The results of correlating the emissivity of pure metals in the liquid phase with the atomic number of the element in the periodic system and the properties, which include the coefficients of thermal expansion and surface tension, are presented. The results obtained fit the Periodic law. The emissivity has a periodicity with traceable translational properties.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1187 - 1191"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145181","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
Stabilization of controlled disturbances in a supersonic boundary layer by slots 超声速边界层中狭缝稳定可控扰动的研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060039
V. I. Lysenko, B. V. Smorodsky, A. D. Kosinov, A. A. Yatskikh, L. V. Afanasyev
{"title":"Stabilization of controlled disturbances in a supersonic boundary layer by slots","authors":"V. I. Lysenko,&nbsp;B. V. Smorodsky,&nbsp;A. D. Kosinov,&nbsp;A. A. Yatskikh,&nbsp;L. V. Afanasyev","doi":"10.1134/S0869864324060039","DOIUrl":"10.1134/S0869864324060039","url":null,"abstract":"<div><p>A pioneering study of the influence of streamwise slots (grooves) of various depths <i>h</i> (corresponding to the Reynolds numbers Re<sub><i>h</i></sub> = 900 and 1300) on the stability of a supersonic (Mach number M = 2) boundary layer on a flat plate with respect to controlled disturbances of the first (vorticity) mode of instability determining the laminar-turbulent transition at M = 2 is performed. At Reynolds numbers Re<sub><i>h</i></sub> = 900 and 1300, the growth rates of three-dimensional disturbances at frequency <i>f</i> = 14 kHz are found to be smaller than the corresponding value for the smooth plate. Thus, it is shown that controlled disturbances of the first mode can be stabilized by streamwise aligned slots of a small depth (Re<sub><i>h</i></sub> &lt; 1500).</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1147 - 1152"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145180","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
Pseudo turbulence in laminar and transitional regimes of an upward bubble flow in a pipe 管道中向上气泡流的层流和过渡态中的伪湍流
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060143
L. S. Timkin, R. S. Gorelik
{"title":"Pseudo turbulence in laminar and transitional regimes of an upward bubble flow in a pipe","authors":"L. S. Timkin,&nbsp;R. S. Gorelik","doi":"10.1134/S0869864324060143","DOIUrl":"10.1134/S0869864324060143","url":null,"abstract":"<div><p>In a bubble flow, both inherent liquid turbulence and pseudo turbulence induced by the bubbles are present. Total two-phase turbulence of the flow is determined by the interaction of these two components. The experimental values of the average wall shear stress and its pulsations obtained by eight double electrodiffusional probes located uniformly in one section along the pipe perimeter are presented. The gas phase is represented by monodisperse bubble mixtures with average diameters of 1 and 2 mm and a volumetric gas content of up to 20%. To modify the bubble Reynolds numbers, two working solutions with different viscosities were used. The superficial liquid velocity did not exceed 1 m/s. Flow regimes with deviations from the Sato hypothesis on the additivity of pseudo turbulence and inherent liquid turbulence were detected. At transitional liquid Reynolds numbers and small bubble Reynolds numbers, total two-phase turbulence is determined by pseudo turbulence, and there is no the influence of inherent liquid turbulence.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1239 - 1244"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145182","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
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