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Effect of passive perturbation from an obstacle on heat transfer in a turbulent bubble flow: experiment and numerical simulation 障碍物被动扰动对湍流泡流传热的影响：实验与数值模拟
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020010
I. A. Evdokimenko, K. A. Filippsky, P. D. Lobanov, M. A. Pakhomov
{"title":"Effect of passive perturbation from an obstacle on heat transfer in a turbulent bubble flow: experiment and numerical simulation","authors":"I. A. Evdokimenko,&nbsp;K. A. Filippsky,&nbsp;P. D. Lobanov,&nbsp;M. A. Pakhomov","doi":"10.1134/S0869864326020010","DOIUrl":"10.1134/S0869864326020010","url":null,"abstract":"<div><p>The influence of a passive perturbation from a vortex-generating rib on heat transfer in a bubble flow in a flat channel was studied experimentally and numerically. Wall temperature measurements were taken using an IR camera. Unsteady Reynolds-averaged Navier–Stokes equations, written with consideration of polydisperse bubbles and within the Eulerian approach, were used to describe the flow dynamics and heat and mass transfer in the gas and dispersed phases. The influence of flow velocity, air bubble concentration, and vortex-generating rib height on heat transfer in a two-phase gas-liquid flow was also studied. It was found that the thermal pattern of separated two-phase bubble flow behind an obstacle in the presence of a passive perturbation differs significantly from the dynamic pattern. The results demonstrated an increase in heat transfer in the bubble flow behind an obstacle. The paper presents a comparison between the obtained experimental and numerical data on heat transfer in a two-phase turbulent bubble flow with an obstacle mounted on the channel wall, and shows satisfactory agreement in terms of the characteristics of convective heat transfer.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"199 - 210"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986642","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
Refining the liquidus temperature of the NaCl–KCl system 改善NaCl-KCl体系的液相温度
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020150
A. B. Meshalkin, O. S. Dutova
{"title":"Refining the liquidus temperature of the NaCl–KCl system","authors":"A. B. Meshalkin,&nbsp;O. S. Dutova","doi":"10.1134/S0869864326020150","DOIUrl":"10.1134/S0869864326020150","url":null,"abstract":"<div><p>The liquidus temperature in the NaCl–KCl system was investigated using oscillation phase analysis (OPA). The study encompassed 14 samples with potassium chloride concentrations ranging from 0 to 100 mol %. As a result, the melting points of the pure components were established, and the temperature and composition near the liquidus minimum were determined.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"367 - 370"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986649","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
Influence of mechanical vibration on nucleate boiling heat transfer at different pressures 不同压力下机械振动对核沸腾传热的影响
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020113
D. V. Kuznetsov, I. A. Kosovskih, O. A. Volodin, I. M. Serdyuk, V. S. Serdyukov
{"title":"Influence of mechanical vibration on nucleate boiling heat transfer at different pressures","authors":"D. V. Kuznetsov,&nbsp;I. A. Kosovskih,&nbsp;O. A. Volodin,&nbsp;I. M. Serdyuk,&nbsp;V. S. Serdyukov","doi":"10.1134/S0869864326020113","DOIUrl":"10.1134/S0869864326020113","url":null,"abstract":"<div><p>The paper presents results of experimental study on the influence of mechanical vibration on heat transfer and evaporation dynamics in nucleation boiling of saturated water (for the pressure interval 10 – 101.3 kPa). Relevance of the study is due to a demand in increasing the heat transfer efficiency for power installations and heat-processing systems operating at low pressures under conditions of external mechanical impact. Regardless numerous publications on boiling under atmospheric pressure, the influence of vibrations at low pressures remains scarcely investigated. This study demonstrated that the applied vibrations result in the earlier start of boiling, lower overheating for the heated surface and a higher heat flux at a fixed overheating. The most explicit phenomenon is observed at low pressures. For the case of atmospheric pressure, this vibration influence declines and observed mainly for the initial nucleation boiling. Analysis of video materials shows that the vibration impact results in a reduction of bubble diameter at departure, separation frequency and an increase in the nucleation site density, especially at low pressures. Experimental results confirm that mechanical vibrations are an efficient tool for boiling process control and can be used in designing and optimization of heat engineering systems operating within in a wide pressure range.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"323 - 330"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986650","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 air amount in a gasification chamber on the operating parameters of a burner with superheated steam atomization 气化室风量对过热蒸汽雾化燃烧器运行参数的影响
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020071
I. S. Sadkin, E. P. Kopyev
{"title":"Effect of air amount in a gasification chamber on the operating parameters of a burner with superheated steam atomization","authors":"I. S. Sadkin,&nbsp;E. P. Kopyev","doi":"10.1134/S0869864326020071","DOIUrl":"10.1134/S0869864326020071","url":null,"abstract":"<div><p>The thermal and environmental characteristics of liquid hydrocarbon fuel combustion in a steam-atomizing burner with a gasification chamber under limited air supply to the chamber and various power settings were studied. For the first time it was shown that limiting the primary air supply to the gasification chamber during steam atomizing leads to a narrowing of the device operating zone and a shift in carbon monoxide emission characteristics compared to a burner with unrestricted air supply. A significant advantage is the dramatic reduction (up to 70 %) in nitrogen oxide emissions due to lower peak temperatures in the combustion zone. A comparison of the characteristics with those of a device with forced air supply revealed that with the same amount of air in the gasification chamber, the different supply methods exhibit differences in the distribution of combustion products, such as CO, H<sub>2</sub>, and CH<sub>4</sub> in the flare due to the higher temperatures achieved at forced air supply. As a result, it was established that the modification of an atmospheric steam-atomizing burner by limiting the air supply to the gasification chamber allows for a reduction in NO<sub><i>x</i></sub> production in a wide power range while maintaining high combustion efficiency.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"281 - 289"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986696","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 energy parameters in non-equilibrium supersonic jets at low gas pressure using the data from molecular-beam diagnostics 利用分子束诊断数据研究低气压下非平衡超音速射流的能量参数
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020022
A. E. Zarvin, E. D. Dering, V. V. Dubrovin, V. V. Kalyada
{"title":"Study of energy parameters in non-equilibrium supersonic jets at low gas pressure using the data from molecular-beam diagnostics","authors":"A. E. Zarvin,&nbsp;E. D. Dering,&nbsp;V. V. Dubrovin,&nbsp;V. V. Kalyada","doi":"10.1134/S0869864326020022","DOIUrl":"10.1134/S0869864326020022","url":null,"abstract":"<div><p>The paper deals with an issue of extending the experimental capabilities in the study of gas dynamics for rarefied gas jets through using new diagnostic tools for evaluating the energy parameters of a flow. The study considers the known approaches to measuring temperature in a rarefied gas flow. We provide a detailed description of the presented method and equipment for measuring the transverse density (or intensity) profiles in a molecular beam and deriving the perpendicular speed ratio. Comparison of the experimental data with available data from theoretical models confirmed the reliability of gained information. The possibilities and conditions for calculating the translational (perpendicular) temperature were examined. The analysis covers the error and the reliability range of obtained results as well as the influence of skimmer interaction and background gas penetration on the recorded parameters. In addition, the possibility of expanding the investigation range using the selected method was considered.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"211 - 233"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986643","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
Ethanol phase-equilibrium curve with account for renormalization group and Clapeyron–Clausius equation 考虑重整化基团和克拉珀龙-克劳修斯方程的乙醇相平衡曲线
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020137
S. V. Rykov, I. V. Kudryavtseva, V. A. Rykov
{"title":"Ethanol phase-equilibrium curve with account for renormalization group and Clapeyron–Clausius equation","authors":"S. V. Rykov,&nbsp;I. V. Kudryavtseva,&nbsp;V. A. Rykov","doi":"10.1134/S0869864326020137","DOIUrl":"10.1134/S0869864326020137","url":null,"abstract":"<div><p>This paper presents the developed elasticity line eqiuations for ethanol, vapor and liquid branches of coesistence and “apparent” heat of vaporization <i>r</i>*. They describe the phase-equilibrium curve in a temperature range from the triple to cirtical points. All four equations are complied by critical parameters, as well as by degrees for all equation components which have been calculated in the framework of renormalization group and the scale theory. The saturation curve coefficients defining the behavior of mean diameter and order parameter in the critical point vicinity are found from a correlation. This correlation links critical amplitude and a critical index in a saturation curve and a renormalization group. The developed model of phase equilibrium curve describes the experimental data on presure and density of saturated vapor and saturated liquid eathnol density with a smaller error than from the presvious equations [1–4].</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"339 - 353"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986698","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
Control of semiconductor surface morphology and wettability via nanosecond laser texturing 通过纳秒激光变形控制半导体表面形貌和润湿性
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020162
M. M. Vasilev, A. A. Rodionov, T. Giannakis, M. Kandyla, V. S. Sulyaeva, V. V. Terekhov, S. V. Starinskiy
{"title":"Control of semiconductor surface morphology and wettability via nanosecond laser texturing","authors":"M. M. Vasilev,&nbsp;A. A. Rodionov,&nbsp;T. Giannakis,&nbsp;M. Kandyla,&nbsp;V. S. Sulyaeva,&nbsp;V. V. Terekhov,&nbsp;S. V. Starinskiy","doi":"10.1134/S0869864326020162","DOIUrl":"10.1134/S0869864326020162","url":null,"abstract":"<div><p>Efficient thermal management in modern compact electronics requires surfaces with controlled wettability and strong wicking capability. Although laser-textured silicon is widely studied for its optical response, its wetting and capillary transport properties remain less explored. In this work, silicon wafers were processed using a nanosecond Nd:YAG laser to create two types of textured surfaces, GraySi and BlackSi. The resulting microstructures were characterized in terms of morphology, wettability, and wicking performance using the Wi number. BlackSi exhibited significantly greater wicking capability (Wi = 2.3) compared to GraySi (Wi = 1.3). The evaporation behavior of water droplets was also investigated. Laser texturing was shown to reduce evaporation time due to enhanced hydrophilicity and, importantly, to modify the evaporation mode: BlackSi maintained a constant contact radius regime, while GraySi transitioned to a mixed regime.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"371 - 379"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986653","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
Bubble dynamics during boiling on biphilic surfaces with cavity arrays 具有空腔阵列的双亲表面沸腾过程中的气泡动力学
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020101
V. Yu. Vladimirov, S. Ya. Khmel, E. A. Chinnov
{"title":"Bubble dynamics during boiling on biphilic surfaces with cavity arrays","authors":"V. Yu. Vladimirov,&nbsp;S. Ya. Khmel,&nbsp;E. A. Chinnov","doi":"10.1134/S0869864326020101","DOIUrl":"10.1134/S0869864326020101","url":null,"abstract":"<div><p>The boiling process on a biphilic copper surface with arrays of hydrophobic cavities approximately 100 µm in size and 780 µm in pitch was caught on video. The bubble departure diameters and frequencies were determined as functions of heat flux, and their rise velocities were determined as functions of diameter. The dependence of the bubble diameters on heat flux was compared with theoretical dependences and with data from other authors. It was shown that common dependences do not take into account parameters important for boiling on biphilic surfaces with inhomogeneities in the form of cavities and are poorly suited for describing bubble dynamics.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"315 - 321"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986699","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
Application of the method for determining the frequency response of a constant-temperature hot-wire anemometer using a laser pulse 用激光脉冲测定恒温热线风速计频率响应方法的应用
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S0869864326020083
D. A. Bountin, O. I. Vishnyakov
{"title":"Application of the method for determining the frequency response of a constant-temperature hot-wire anemometer using a laser pulse","authors":"D. A. Bountin,&nbsp;O. I. Vishnyakov","doi":"10.1134/S0869864326020083","DOIUrl":"10.1134/S0869864326020083","url":null,"abstract":"<div><p>This publication is a continuation of research on finding the frequency response (FR) for a constant-temperature hot-wire anemometer which is based on the impact of a short-time pulse applied directly to a sensitive element of the probe; this emulates a delta-function impact. The thermal pulse is created by laser radiation. This approach allows evaluating the influence of FR-distorting factors like different settings for a hot-wire anemometer and varying the flow velocity. The study gives practical recommendations on choosing the intensity of impact/power of laser radiation for correct FR evaluation. The practical application of this method was demonstrated through comparing the pulsation spectra in a boundary layer.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"291 - 304"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986700","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
Thermodynamic and elastic properties of polymer blends obtained by supercritical dispersion 超临界分散获得的聚合物共混物的热力学和弹性性能
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-09-19 DOI: 10.1134/S086986432602006X
I. M. Abdulagatov, E. G. Pashuk, A. E. Ramazanova, A. E. Bakmaev, Z. G. Omarov, Z. Z. Abdulagatova, V. F. Khairutdinov, I. Sh. Khabriev
{"title":"Thermodynamic and elastic properties of polymer blends obtained by supercritical dispersion","authors":"I. M. Abdulagatov,&nbsp;E. G. Pashuk,&nbsp;A. E. Ramazanova,&nbsp;A. E. Bakmaev,&nbsp;Z. G. Omarov,&nbsp;Z. Z. Abdulagatova,&nbsp;V. F. Khairutdinov,&nbsp;I. Sh. Khabriev","doi":"10.1134/S086986432602006X","DOIUrl":"10.1134/S086986432602006X","url":null,"abstract":"<div><p>The paper presents the results of an experimental study of the thermal conductivity (<i>λ</i>), heat capacity (<i>C</i><sub>p</sub>), density (<i>ρ</i>) coefficients and elastic moduli of four polymer blend samples as functions of temperature and pressure. The polymers were synthesized by supercritical dispersion using a CO<sub>2</sub> solution (SEDS). Thermal conductivity measurements were carried out using the stationary flat layer method in the temperature range of (293–343) K at a pressure of 0.101 MPa and the PP2 sample was measured at a pressure of up to 40 MPa. The heat capacity of the same samples was measured in the temperature range of (129–363) K using a DSC 204 F1 differential scanning calorimeter. Elastic moduli were obtained by measuring the propagation velocity of longitudinal and transverse ultrasonic waves using the pulsed method.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"33 2","pages":"271 - 280"},"PeriodicalIF":0.5,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986644","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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