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Experimental study of unstable film boiling on a modified heating surface 改良加热表面上不稳定膜沸腾的实验研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010305
A. A. Levin, P. V. Khan, A. S. Safarov, I. A. Filatov, M. K. Moskvin
{"title":"Experimental study of unstable film boiling on a modified heating surface","authors":"A. A. Levin,&nbsp;P. V. Khan,&nbsp;A. S. Safarov,&nbsp;I. A. Filatov,&nbsp;M. K. Moskvin","doi":"10.1134/S0869864325010305","DOIUrl":"10.1134/S0869864325010305","url":null,"abstract":"<div><p>An experimental investigation is conducted on a specific boiling regime of a subcooled water flow, leading to the formation of superintensive heat exchange with a metal heater. To analyze the influence of surface modification, several heaters with different micro-geometries were used: a smooth one with <i>R</i><sub>c</sub> = 0.5 µm and a modified one processed using laser ablation. In the latter case, the surface micro-relief is characterized by a roughness of <i>R</i><sub>c</sub> = 10 µm, as well as the presence of cylindrical protrusions with a height and diameter of 200 µm. The experiments were carried out in a vertical channel at an initial pressure of 0.29 MPa, a maximum heater temperature of 450 °C, and an average flow velocity of 0.52 m/s.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"40 - 46"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682837","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 and pressure drop in a downward flow in a horizontal bundle of rods during short-time injection 短时间注入过程中水平杆束下流中的气泡动力学和压降
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010329
N. A. Pribaturin, I. A. Evdokimenko, P. D. Lobanov, D. E. Legostaev, K. A. Filippskii, N. A. Gulyaev, A. I. Svetonosov
{"title":"Bubble dynamics and pressure drop in a downward flow in a horizontal bundle of rods during short-time injection","authors":"N. A. Pribaturin,&nbsp;I. A. Evdokimenko,&nbsp;P. D. Lobanov,&nbsp;D. E. Legostaev,&nbsp;K. A. Filippskii,&nbsp;N. A. Gulyaev,&nbsp;A. I. Svetonosov","doi":"10.1134/S0869864325010329","DOIUrl":"10.1134/S0869864325010329","url":null,"abstract":"<div><p>The study is devoted to the investigation of pressure fluctuations in a downward flow in a rectangular channel (80×152×440 mm) with a horizontal pipe bundle during a short-time injection of a single gas bubble. The fluid flow velocity ranged from 0 to 0.7 m/s. The gas flowed into the channel from a fixed volume of 30 ml with an injection pressure in the range of 2–12 bar. It was found that an increase in injection pressure leads to an increase in the amplitude of oscillations. It was also established that the fluid flow rate does not significantly affect the pressure change in the system in this injection pressure range.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"56 - 61"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682839","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
Approximate solution of the local induction equation for a conical helical vortex 锥形螺旋涡局部感应方程的近似解
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010299
P. A. Kuibin
{"title":"Approximate solution of the local induction equation for a conical helical vortex","authors":"P. A. Kuibin","doi":"10.1134/S0869864325010299","DOIUrl":"10.1134/S0869864325010299","url":null,"abstract":"<div><p>The work is devoted to finding an approximate analytical solution of the Local Induction Equation describing evolution of the vortex filament of a conical helical form. The solution for the radial coordinate of the filament is presented in implicit quadrature form. Analitical formulas for the two remaining coordinates, angular and axial ones are derived. The found approximate solution provides clear picture of the vortex filament dynamics in dependence on the problem parameters. This sollution allows one to omit the initial period during numerical integration of the Local Induction Equation.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"34 - 39"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682830","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 heat transfer during cooling of a high-temperature surface by a water-air spray 水-空气喷雾冷却高温表面时传热的实验研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010263
A. Zakharenkov, A. Demidov, A. Dedov, A. Komov
{"title":"Experimental study of heat transfer during cooling of a high-temperature surface by a water-air spray","authors":"A. Zakharenkov,&nbsp;A. Demidov,&nbsp;A. Dedov,&nbsp;A. Komov","doi":"10.1134/S0869864325010263","DOIUrl":"10.1134/S0869864325010263","url":null,"abstract":"<div><p>This paper presents the results of a study into the cooling efficiency of a target in a test section using a water-air spray under high heat flux conditions that is applicable to solving temperature control problems in the fusion energy, microelectronic, and metallurgical industries. Experimental studies were conducted in the ‘One-Sided Target Heating’ thermophysical test facility at the National Research University “Moscow Power Engineering Institute” (MPEI). In the experiments, the flowrates of the coolant components ranged from 0.5 to 2 l/min for water and from 2 to 100 l/min for air. It is found that this cooling system can remove heat loads as high as 10 MW/m<sup>2</sup> from the target at relatively low pressures of the coolant components. The study demonstrates that the examined cooling method can yield heat transfer coefficients of up to 150 kW/(m<sup>2</sup>·K).</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"9 - 15"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682831","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
Impact of the micro heat sink internal structure on the heat and mass transfer 微散热器内部结构对传热传质的影响
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010251
N. B. Bikkinina, A. Z. Bulatova, O. A. Solnyshkina
{"title":"Impact of the micro heat sink internal structure on the heat and mass transfer","authors":"N. B. Bikkinina,&nbsp;A. Z. Bulatova,&nbsp;O. A. Solnyshkina","doi":"10.1134/S0869864325010251","DOIUrl":"10.1134/S0869864325010251","url":null,"abstract":"<div><p>Due to the rapid development of the microelectronic industry, new efficient cooling systems are required. The most promising is the liquid cooling technology with the introduction of cooling devices directly into the microelectronic chips. In this paper, we study the liquid flow and its integral characteristics in microchannels with pin fin arrays. Various internal geometries of microchannels are considered, including both uniformly distributed cylindrical pins and systems with two packing scales. The effect of changing the pin spatial distribution in microchannels with the same void coefficient on the flow rate variation, velocity field and temperature distribution is shown. The results obtained can be used in the design of microfluidic heat sinks.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"1 - 8"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682832","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 the dynamics of the near wake of aero-suspension particles using the Euler approach 用欧拉方法研究空气悬浮颗粒近尾迹的动力学
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010342
E. S. Baymetova, E. A. Mitrukova, A. A. Chernova, A. R. Shigapova
{"title":"Study of the dynamics of the near wake of aero-suspension particles using the Euler approach","authors":"E. S. Baymetova,&nbsp;E. A. Mitrukova,&nbsp;A. A. Chernova,&nbsp;A. R. Shigapova","doi":"10.1134/S0869864325010342","DOIUrl":"10.1134/S0869864325010342","url":null,"abstract":"<div><p>The work studies the possibility of applying the Eulerian approach to investigate the near field aerodynamics of aero-suspension with low water content in the carrying gas flow. The problem of a cube being flowed by an air suspension is considered. The approximate solution of the obtained system of equations is constructed by the finite volume method in space and the Euler method in time using the multiphaseEulerFoam module included in OpenFOAM. The peculiarities of aerodynamics of dry aero-suspension at flowing around of a smooth cube are investigated by methods of mathematical modeling. The lower bound of applicability of the Euler approximation is estimated. It is shown that the use of this approach for numerical modeling of the dynamics of two-phase flows with a second phase content below 1 % at low flow rates (without making changes to the initial system of equations and upgrading numerical schemes and algorithms) is not advisable.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"68 - 74"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682836","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
Physics-informed neural networks for modeling steady-state heat conduction 用于模拟稳态热传导的物理信息神经网络
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010287
V. A. Glazunov, A. P. Koroleva, M. A. Nesterov
{"title":"Physics-informed neural networks for modeling steady-state heat conduction","authors":"V. A. Glazunov,&nbsp;A. P. Koroleva,&nbsp;M. A. Nesterov","doi":"10.1134/S0869864325010287","DOIUrl":"10.1134/S0869864325010287","url":null,"abstract":"<div><p>The paper presents the results of research on the application of physics-informed neural networks (PINN) for solving the steady state heat conduction equation. The solutions of the heat conduction equation with boundary conditions of I, II and III kinds, and also taking into account the presence of a heat source are considered. Formulations of heat conduction problems and error functions for one-dimensional and two-dimensional cases are given. The proposed neural network is implemented using PyTorch and DeepXDE frameworks. Based on the import of mesh data from the digital product “Logos Heat”, the possibility of using geometry of arbitrary type is provided. The influence of the neural network architecture and the choice of the activation function on the obtained results is investigated. Numerical experiments for the proposed method are carried out on one-dimensional and two-dimensional problems having exact and known numerical solution.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"23 - 33"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682834","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
Propagation of large-scale artificial perturbations over gas-sheared liquid films 大尺度人工扰动在气体剪切液膜上的传播
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010330
A. V. Cherdantsev
{"title":"Propagation of large-scale artificial perturbations over gas-sheared liquid films","authors":"A. V. Cherdantsev","doi":"10.1134/S0869864325010330","DOIUrl":"10.1134/S0869864325010330","url":null,"abstract":"<div><p>High rates of heat and mass transfer in annular gas-liquid flow are mainly achieved due to presence of large-scale disturbance waves. Under low liquid flow rates, the disturbance waves cannot be produced even for high gas speeds. Here we apply low-frequency oscillations of liquid flow rate to produce artificial non-uniformity of liquid film in absence of disturbance waves and investigate the evolution of these perturbations. The distance over which the perturbations survive grows with decreasing liquid flow rate and increasing gas speed. This method of flow control may be instrumental in improving the performance of industrial equipment working in the relevant range of flow rates.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"62 - 67"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682835","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
Three-dimensional ice profile flat cut triangulation control in dynamics 三维冰剖面平切三角剖分动力学控制
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010275
V. O. Zuev, S. V. Dvoynishnikov, I. K. Kabardin, S. V. Kakaulin, M. R. Gordienko
{"title":"Three-dimensional ice profile flat cut triangulation control in dynamics","authors":"V. O. Zuev,&nbsp;S. V. Dvoynishnikov,&nbsp;I. K. Kabardin,&nbsp;S. V. Kakaulin,&nbsp;M. R. Gordienko","doi":"10.1134/S0869864325010275","DOIUrl":"10.1134/S0869864325010275","url":null,"abstract":"<div><p>Due to widespread use of ice three-dimensional geometry control systems based on optical triangulation and structured lighting on aerodynamic and climatic experimental stands, the development relevance of analyzing icing processes methods based on the obtained measurement data increases. The work is devoted to the development of a three-dimensional ice profile flat cut control in dynamics method based on the results of measuring its three-dimensional geometry at different points in time by a triangulation system based on structured lighting. The proposed method is based on the restoration of polygonal ice surfaces and the search for their intersections with a given plane. The reliability of the reconstructed ice three-dimensional profile flat cut is justified by connecting into polygons only neighboring ice surface points. The practical implementation of the proposed method for analyzing the process of a cylindrical object icing in a climate chamber has been carried out. The obtained results confirmed the efficiency of the proposed approach for analyzing the icing of the diagnosed object in dynamics.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"16 - 22"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682833","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
An IR thermography study of the influence of spray cooling parameters on heat transfer characteristics with a subcooled liquid 喷雾冷却参数对过冷液体传热特性影响的红外热成像研究
IF 0.6 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2026-04-16 DOI: 10.1134/S0869864325010317
M. A. Polovnikov, A. S. Surtaev
{"title":"An IR thermography study of the influence of spray cooling parameters on heat transfer characteristics with a subcooled liquid","authors":"M. A. Polovnikov,&nbsp;A. S. Surtaev","doi":"10.1134/S0869864325010317","DOIUrl":"10.1134/S0869864325010317","url":null,"abstract":"<div><p>This study presents the results of an experimental investigation of heat transfer during spray cooling with subcooled distilled water using two types of nozzles. The influence of key operating parameters — the distance between the nozzle and the heater surface, liquid flow rate and initial liquid temperature — on heat transfer and temperature field distribution during spray cooling was studied. It is shown that the optimal distance at which maximum heat transfer and minimum surface temperature are achieved depends on the nozzle type and occurs at different ratios of diameter of impact area to heater size (<i>D/a</i>). Increasing the liquid flow rate and its initial temperature leads to an enhancement of heat transfer intensity during spray cooling. At the same time, as the flow rate increases, the rate of growth of the heat transfer coefficient with heat flux decreases, which is explained by the reduction of the relative contribution of phase transitions to the overall heat transfer balance. In contrast, a decrease in the degree of subcooling results in a higher rate of increase in the heat transfer coefficient, since the contribution of evaporation and boiling to the heat transfer process becomes more significant.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 1","pages":"47 - 55"},"PeriodicalIF":0.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147682838","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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