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Numerical Simulation of Supersonic Flows with Nonequilibrium Chemical Reactions 含非平衡化学反应的超音速流动数值模拟
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224700981
A. M. Molchanov, A. S. Myakochin, V. I. Panevin, S. Yu. Mesnyankin
{"title":"Numerical Simulation of Supersonic Flows with Nonequilibrium Chemical Reactions","authors":"A. M. Molchanov,&nbsp;A. S. Myakochin,&nbsp;V. I. Panevin,&nbsp;S. Yu. Mesnyankin","doi":"10.1134/S1063784224700981","DOIUrl":"10.1134/S1063784224700981","url":null,"abstract":"<p>A new efficient implicit fully coupled numerical method for calculating thermochemical nonequilibrium flows is developed. Such flows are described by partial differential equations for conservation of mass, momentum, total energy, conservation of mass for each component, transfer of turbulent characteristics, etc. The total number of equations can be very large, which greatly complicates the solution of the general finite volume vector equation by using the standard fully implicit approach. The proposed method allows one to reduce operations with block tridiagonal matrices to inversion of 5 × 5 matrices and trivial operations of matrix multiplication. The numerical method is used to calculate the afterburning of the jet and for the supersonic combustion of hydrogen in the channel. The results show that for the considered problems, the new method is about two times more efficient than the standard fully implicit method.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2642 - 2648"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629741","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
Design of a Simulation Model of a Temperature Sensor under Critical Temperature and Sinusoidal Vibrations 临界温度正弦振动下温度传感器仿真模型的设计
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224701093
E. A. Fokina, A. A. Trofimov, V. N. Ponomarev, S. A. Zdobnov
{"title":"Design of a Simulation Model of a Temperature Sensor under Critical Temperature and Sinusoidal Vibrations","authors":"E. A. Fokina,&nbsp;A. A. Trofimov,&nbsp;V. N. Ponomarev,&nbsp;S. A. Zdobnov","doi":"10.1134/S1063784224701093","DOIUrl":"10.1134/S1063784224701093","url":null,"abstract":"<p>Vibration measurement is among the most popular and cost-effective methods for diagnostics of the overall condition of equipment and is of undeniable importance in modern technology. Thanks to this process, manufacturers and consumers can be sure of the reliability and quality of technical systems, as well as prevent possible malfunctioning and failures. Vibration measurements in various fields confirm their versatility and importance in modern technical progress. The measurement of the effects of critical temperatures on a temperature sensor is aimed at determination of possible changes in the accuracy and reliability of the sensor. This will improve the quality of temperature measurement, eliminate inaccuracies and errors in operation of equipment, and increase the efficiency of the equipment under various operating conditions. The research method in this paper is a simulation model of the sensor, which is used to test for vibration and exposure to critical temperatures. Ansys and SolidWorks Simulation software are used to create the model to avoid costly and time-consuming test cycles. The results of the simulation modeling are used to construct diagrams of mechanical stress distribution under sinusoidal vibration and diagrams of temperature distribution under critical temperatures.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2620 - 2625"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629737","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
Synthesis of SiC in an Electric Arc Argon Plasma 电弧氩等离子体中碳化硅的合成
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S106378422470107X
E. A. Erlingaite, N. G. Andreeva, A. V. El’chishcheva, R. R. Shaikhattarov, I. G. Galeev, B. A. Timerkaev
{"title":"Synthesis of SiC in an Electric Arc Argon Plasma","authors":"E. A. Erlingaite,&nbsp;N. G. Andreeva,&nbsp;A. V. El’chishcheva,&nbsp;R. R. Shaikhattarov,&nbsp;I. G. Galeev,&nbsp;B. A. Timerkaev","doi":"10.1134/S106378422470107X","DOIUrl":"10.1134/S106378422470107X","url":null,"abstract":"<p>An experimental setup that consists of a vacuum chamber, vacuum pump, power source, pressure gage to measure the pressure in the chamber, ballast resistor, and gas delivery system has been constructed, and the process of SiC growth in an argon arc discharge has been studied. Appropriate process conditions have been selected, and experiments on SiC synthesis have been carried out in the vacuum chamber in an argon atmosphere at a pressure of 350−500 Torr. The grown material has been examined under optical and scanning electron microscopes. It has been reliably established that the presented approach provides the synthesis of SiC nano- and microparticles with a diamond-like structure.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2616 - 2619"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629746","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
Nonuniformity of Temperature Distributions of Flue Gas Temperature over the Depth of a Tube Furnace 管式炉烟气温度分布的不均匀性
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S106378422470097X
A. V. Sadykov
{"title":"Nonuniformity of Temperature Distributions of Flue Gas Temperature over the Depth of a Tube Furnace","authors":"A. V. Sadykov","doi":"10.1134/S106378422470097X","DOIUrl":"10.1134/S106378422470097X","url":null,"abstract":"<p>The influence of a three-dimensional change in the parameters of flue gases on the distributions of temperatures and radiant heat fluxes in the radiant chamber of a tubular furnace is investigated. The external heat and mass transfer in the radiant chamber of the furnace is modeled by three-dimensional differential equations of energy, radiation transfer, motion, continuity, <i>k</i>–ε turbulence model, and two-step model of methane combustion. To solve the equation of radiation transfer, the method of discrete ordinates is used. Areas with the highest temperature gradients are identified.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2671 - 2674"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629635","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
Spatial Characteristics of Arc Discharge Plasma in Relation to the Synthesis of Silicon Nanostructures 电弧放电等离子体的空间特性与硅纳米结构的合成
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224701081
A. A. Kaleeva, B. A. Timerkaev, O. A. Petrova, A. A. Saifutdinova
{"title":"Spatial Characteristics of Arc Discharge Plasma in Relation to the Synthesis of Silicon Nanostructures","authors":"A. A. Kaleeva,&nbsp;B. A. Timerkaev,&nbsp;O. A. Petrova,&nbsp;A. A. Saifutdinova","doi":"10.1134/S1063784224701081","DOIUrl":"10.1134/S1063784224701081","url":null,"abstract":"<p>The paper presents an arc discharge model as applied to the synthesis problems of semiconductor nanostructures. The model is based on a completely nonequilibrium approximation and includes charged particle density balance equations, electron energy balance and energy balance equation for the heavy component of plasma, and Poisson’s equations for describing a self-consistent electric field. As a result of a numerical study of the system of equations describing an electric arc discharge, spatial distributions of the main characteristics of an arc discharge, such as the potential and intensity of the electric field, densities of electrons and ions, and gas temperatures were obtained.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2626 - 2631"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629738","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
Periodicity of the Debye Temperature of Metals 金属德拜温度的周期性
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224700993
D. V. Kosenkov, V. V. Sagadeev
{"title":"Periodicity of the Debye Temperature of Metals","authors":"D. V. Kosenkov,&nbsp;V. V. Sagadeev","doi":"10.1134/S1063784224700993","DOIUrl":"10.1134/S1063784224700993","url":null,"abstract":"<p>On the basis of the theory of dimensions, the relationship between the periodicity of the Debye temperatures of metals and integral hemispherical fluxes of thermal radiation is revealed. The periodicity of the Debye temperatures of metals is established in accordance with the position in the Periodic System.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2638 - 2641"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629740","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 the Possibility of Using Aluminosilicates as a Foaming Filler for Sandwich Panels 硅酸盐铝用作夹芯板发泡填料的可能性研究
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224701056
K. Aeraiguli, K. A. Andrianova, L. M. Amirova
{"title":"Study of the Possibility of Using Aluminosilicates as a Foaming Filler for Sandwich Panels","authors":"K. Aeraiguli,&nbsp;K. A. Andrianova,&nbsp;L. M. Amirova","doi":"10.1134/S1063784224701056","DOIUrl":"10.1134/S1063784224701056","url":null,"abstract":"<p>The paper considers the possibility of using aluminosilicate binders as a foaming aggregate for sandwich panels. The main factors influencing the foaming process (viscosity, surface tension of the compositions, as well as the time and temperature of the process) are investigated. The optimal foaming temperature and time of drying, foaming, and solidification have been determined to achieve a strong and homogeneous foam structure. Tests for the strength of the glued joint of the obtained panels have been carried out.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2606 - 2609"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629742","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
Experimental Stand and Methodology for Conducting Experiment to Measure the Solubility Coefficient of Supercritical Carbon Dioxide in Hydrocarbons in a Homogeneous Porous Medium 均质多孔介质中超临界二氧化碳在碳氢化合物中的溶解度系数测定实验台及方法
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784225700045
I. D. Zakiev, A. V. Radayev, A. A. Mukhamadiyev, A. N. Sabirzyanov
{"title":"Experimental Stand and Methodology for Conducting Experiment to Measure the Solubility Coefficient of Supercritical Carbon Dioxide in Hydrocarbons in a Homogeneous Porous Medium","authors":"I. D. Zakiev,&nbsp;A. V. Radayev,&nbsp;A. A. Mukhamadiyev,&nbsp;A. N. Sabirzyanov","doi":"10.1134/S1063784225700045","DOIUrl":"10.1134/S1063784225700045","url":null,"abstract":"<p>The article presents the results of studies of the process of oil displacement with supercritical CO<sub>2</sub> fringes and water from a low-permeable heterogeneous oil reservoir with a water content of 8% at a pressure of 8 and 12 MPa. The results show that an increase in the CO<sub>2</sub> injection pressure does not lead to an increase in the oil displacement coefficient within the experimental error. The mechanism of the process of displacing oil from a low-permeable heterogeneous reservoir is considered. The results of the experiment are processed in the form of a generalizing dependence.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2719 - 2725"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629677","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
Nonlinear Diagnostics of Semiconductors by Multifrequency Radiation at Low Temperatures 低温下多频辐射对半导体非线性诊断的影响
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S106378422470110X
A. A. Adkhamov, F. Kholmurodov
{"title":"Nonlinear Diagnostics of Semiconductors by Multifrequency Radiation at Low Temperatures","authors":"A. A. Adkhamov,&nbsp;F. Kholmurodov","doi":"10.1134/S106378422470110X","DOIUrl":"10.1134/S106378422470110X","url":null,"abstract":"<p>Diagnostics of semiconductors by multi-frequency irradiation is a fairly effective way to determine all possible parameters of the samples. It is shown that, when a semiconductor sample cooled to low temperatures is irradiated by multi-frequency electromagnetic radiation, several variants of nonlinear scattering in the crystal plasma are possible. Nonlinear interaction of incident and reflected light waves in the region where the plasma flow velocity is close to the speed of sound can significantly reduce the efficiency of using multi-frequency pumping for deep diagnostics of semiconductor crystals with a narrow band gap at low temperatures.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2603 - 2605"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629720","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
Reynolds Number as a Universal Function for Determining the Equilibrium Concentration of a Solvent–Solid System for a Flow Measurement Method 雷诺数作为确定溶剂-固体系统平衡浓度的通用函数用于流量测量方法
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2025-03-15 DOI: 10.1134/S1063784224701123
L. Yu. Yarullin, F. R. Gabitov, L. Yu. Sabirova, V. F. Khairutdinov, Ya. Yu. Korepanova
{"title":"Reynolds Number as a Universal Function for Determining the Equilibrium Concentration of a Solvent–Solid System for a Flow Measurement Method","authors":"L. Yu. Yarullin,&nbsp;F. R. Gabitov,&nbsp;L. Yu. Sabirova,&nbsp;V. F. Khairutdinov,&nbsp;Ya. Yu. Korepanova","doi":"10.1134/S1063784224701123","DOIUrl":"10.1134/S1063784224701123","url":null,"abstract":"<p>The paper presents the results of an experimental study of the solubility of tannin in SC-CO<sub>2</sub> on isotherms of 308 and 333 K in the pressure range from 8 to 26 MPa. The range of the Reynolds number is established at which the equilibrium concentration (solubility) of tannin in SC-CO<sub>2</sub> is ensured.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 11","pages":"2684 - 2687"},"PeriodicalIF":1.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629715","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
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