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SIMULATION OF HYDRATE PLUG FORMATION DURING JOINT OPERATION OF A GAS-BEARING RESERVOIR AND A WELL UNDER THE EQUILIBRIUM CONDITIONS OF HYDRATE FORMATION DEPENDING ON STRATUM WATER COMPOSITION 基于地层水组成的水合物形成平衡条件下含气储层与井联合作业中水合物塞的形成模拟
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S002189442302013X
I. I. Rozhin, G. I. Ivanov
{"title":"SIMULATION OF HYDRATE PLUG FORMATION DURING JOINT OPERATION OF A GAS-BEARING RESERVOIR AND A WELL UNDER THE EQUILIBRIUM CONDITIONS OF HYDRATE FORMATION DEPENDING ON STRATUM WATER COMPOSITION","authors":"I. I. Rozhin,&nbsp;G. I. Ivanov","doi":"10.1134/S002189442302013X","DOIUrl":"10.1134/S002189442302013X","url":null,"abstract":"<p>A generalized mathematical model of the non-isothermal filtration of natural gas in a porous medium and a modified quasi-stationary model of gas hydrate formation (deposition) in pipelines are used to solve the conjugate problem for the joint operation of the gas reservoir–well system and predict the changes in temperature, pressure, gas moisture content, and well flow section. It is found that the presence of a thick permafrost layer accelerates hydrate formation in the well. It is shown that when the salinity of stratum water is taken into account, the time of complete plugging of the well with hydrates increases.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"284 - 296"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091023","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
ACOUSTIC CHARACTERISTICS OF THE HARTMANN WHISTLE WITH THE HELMHOLTZ RESONATOR 亥姆霍兹谐振腔哈特曼哨子的声学特性
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020086
Yong-Son Jong, Yong-Nam Han, Chol-Yong Yun, In-Dok Kim
{"title":"ACOUSTIC CHARACTERISTICS OF THE HARTMANN WHISTLE WITH THE HELMHOLTZ RESONATOR","authors":"Yong-Son Jong,&nbsp;Yong-Nam Han,&nbsp;Chol-Yong Yun,&nbsp;In-Dok Kim","doi":"10.1134/S0021894423020086","DOIUrl":"10.1134/S0021894423020086","url":null,"abstract":"<p>Based on the turbulence model and the Ffowcs Williams–Hawkings (FW–H) acoustic model, numerical simulations of acoustic characteristics in the Hartmann whistle with the Helmholtz resonator are carried out. The important parameters that control the flow oscillation features of the Hartmann whistle are the stand-off distance, cavity geometry, nozzle pressure ratio, etc. The computational results are compared to experimental data. Under the condition that the jet exit diameter, cavity diameter, nozzle pressure ratio, and stand-off distance remain constant, the mass flow rate and the sound pressure level are calculated as functions of the diameter and length of the Helmholtz resonator. The results show that the sound directivity is similar in the conventional Hartmann whistle and the Hartmann whistle with the Helmholtz resonator, while the sound intensity is higher in the conventional Hartmann whistle. Also, the sound intensity reaches the maximum in the direction perpendicular to the jet. The magnitude of the sound intensity decreases gradually with an increase in the diameter of the Helmholtz resonator, and the decreasing trend in the fundamental resonance frequency is clearly visible. Next, as the length of the Helmholtz resonator increases, the sound intensity first decreases and then increases again. The effect of the resonator length on the fundamental resonance frequency is not large as compared to the resonator diameter.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"240 - 247"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091436","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
NUMERICAL SIMULATION OF HEATING OF EXPERIMENTAL MODEL WALLS IN SUPERSONIC FLOWS 超声速流动中实验模型壁面加热的数值模拟
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020128
I. R. Vasnev, N. N. Fedorova
{"title":"NUMERICAL SIMULATION OF HEATING OF EXPERIMENTAL MODEL WALLS IN SUPERSONIC FLOWS","authors":"I. R. Vasnev,&nbsp;N. N. Fedorova","doi":"10.1134/S0021894423020128","DOIUrl":"10.1134/S0021894423020128","url":null,"abstract":"<p>Results of simulations of supersonic turbulent flows in a channel with allowance for conjugate heat transfer between the air flow and a copper plate modeling the sensitive element of a thermocouple are reported. Numerical simulations are performed for free-stream Mach numbers <span>(text{M}_{infty }=3)</span>, 4, and 5. It is shown that the simulation results agree well with experimental data obtained in a hotshot wind tunnel. It is found that the conjugate heat transfer with the model walls made of steel can be ignored at times of the order of 100 ms.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"279 - 283"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4089270","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
BORON NITRIDE NANOSHEET SURFACE REINFORCEMENT OF ALUMINUM 氮化硼纳米片表面增强铝
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020165
Yinxiang Lei, Yuping Yan
{"title":"BORON NITRIDE NANOSHEET SURFACE REINFORCEMENT OF ALUMINUM","authors":"Yinxiang Lei,&nbsp;Yuping Yan","doi":"10.1134/S0021894423020165","DOIUrl":"10.1134/S0021894423020165","url":null,"abstract":"<p>The boron nitride nanosheet (BNNS), a graphene-like structure with excellent mechanical properties, is one of the most promising candidates for a reinforcement element to design innovative nanocomposites. Herein, we have investigated the BNNS, which serves for surface enhancement of the aluminum matrix via molecular dynamics simulations. The results show that the boron nitride nanosheet coating enlarges the critical yield strength, hardness, and modulus of elasticity. With an increase in the number of boron nitride layers, the strengthening effect is more significant. Meanwhile, a higher system temperature degrades the interfacial energy and weakens the mechanical properties of the BNNS/Al systems.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"325 - 331"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091437","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
APPROACH TO THE LABORATORY MODELING OF THE FLOW VELOCITY DISTRIBUTION BEHIND HYDRO-TURBINE RUNNER 2. VERIFICATION OF THE METHOD 水轮机转轮后流速分布的室内模拟方法2。方法验证
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020037
A. S. Ustimenko, I. V. Litvinov, V. I. Sonin, S. I. Shtork, P. A. Kuibin, A. V. Semenova
{"title":"APPROACH TO THE LABORATORY MODELING OF THE FLOW VELOCITY DISTRIBUTION BEHIND HYDRO-TURBINE RUNNER 2. VERIFICATION OF THE METHOD","authors":"A. S. Ustimenko,&nbsp;I. V. Litvinov,&nbsp;V. I. Sonin,&nbsp;S. I. Shtork,&nbsp;P. A. Kuibin,&nbsp;A. V. Semenova","doi":"10.1134/S0021894423020037","DOIUrl":"10.1134/S0021894423020037","url":null,"abstract":"<p>This paper describes an approach to modeling the flow velocity distribution at the inlet of the hydro turbine draft tube that can significantly reduce test costs. The flow is modeled using a special swirler consisting of a combination of two blade rows: fixed and rotating. The previously proposed method for designing swirlers to generate velocity fields corresponding to the velocity distributions behind real hydro turbines was used to design eight blade rows modeling the velocity distributions in optimal operating modes of hydro turbines of various types. This paper presents a test numerical calculation of the flow parameters using Ansys code and a comparison of design velocity distributions with experimental velocity profiles obtained on an aerodynamic rig using a laser Doppler anemometer. The design, calculated, and experimental flow velocity profiles at the draft tube inlet are shown to be in satisfactory agreement. Thus, the promising approach to the experimental modeling of hydro turbine flow was successfully tested.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"190 - 197"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4089264","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
GAS DYNAMICS AND LIQUID FUEL COMBUSTION IN A MODEL COMBUSTOR 模型燃烧器内气体动力学和液体燃料燃烧
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020116
K. E. Veselov, O. A. Evdokimov
{"title":"GAS DYNAMICS AND LIQUID FUEL COMBUSTION IN A MODEL COMBUSTOR","authors":"K. E. Veselov,&nbsp;O. A. Evdokimov","doi":"10.1134/S0021894423020116","DOIUrl":"10.1134/S0021894423020116","url":null,"abstract":"<p>This paper presents the results of liquid-fuel model combustor calculations based on different numerical approaches to the development of a verified simulation method of combustor operation. Both steady and transient studies were carried using various RANS turbulent models and the detached eddy simulation (DES) method. The results of these studies were compared with experimental data obtained by optical methods. The largest differences between experiment and calculations are observed for the near-axial flow field where recirculation backflow is formed. This vortex structure can be properly resolved in a DES simulation and in transient calculations based on the SAS SST model. The use of the above-mentioned approaches in combination with the flamelet combustion model provides maximum accuracy in predicting the parameters of reacting swirling flow, in particular the velocity and temperature distributions in the combustor.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"266 - 278"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4089749","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
SOLUTIONS OF A SYSTEM OF TWO-DIMENSIONAL EULER EQUATIONS AND STATIONARY STRUCTURES IN AN IDEAL FLUID 理想流体中二维欧拉方程和固定结构系统的解
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020074
O. V. Kaptsov
{"title":"SOLUTIONS OF A SYSTEM OF TWO-DIMENSIONAL EULER EQUATIONS AND STATIONARY STRUCTURES IN AN IDEAL FLUID","authors":"O. V. Kaptsov","doi":"10.1134/S0021894423020074","DOIUrl":"10.1134/S0021894423020074","url":null,"abstract":"<p>A system of the Euler equations that describe two-dimensional steady flows of an ideal fluid is considered. This system is reduced to a nonlinear Laplace equation for the stream function. With the use of the Hirota <span>(tau)</span>-function, solutions of three elliptical equations (sin-Gordon, sinh-Gordon, and Tzitzeica equations) are found. A simple method of deriving solutions in the form of rational expressions in elliptical functions is proposed. The resultant solutions describe sources in a swirled fluid, jet flows, chains of sources and sinks, and vortex structures. It is shown that the fluid flux through a closed curve is quantized in the case of the elliptical sin-Gordon equation.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"230 - 239"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4089742","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
DEFORMATION OF THIN-WALLED STRUCTURAL ELEMENTS HAVING FIXED AREAS OF FINITE DIMENSIONS ON THE BOUNDARY FRONT SURFACES 在边界前表面具有有限尺寸的固定区域的薄壁结构元件的变形
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020153
V. N. Paimushin, V. M. Shishkin
{"title":"DEFORMATION OF THIN-WALLED STRUCTURAL ELEMENTS HAVING FIXED AREAS OF FINITE DIMENSIONS ON THE BOUNDARY FRONT SURFACES","authors":"V. N. Paimushin,&nbsp;V. M. Shishkin","doi":"10.1134/S0021894423020153","DOIUrl":"10.1134/S0021894423020153","url":null,"abstract":"<p>Solving as an example the plane problem of the mechanics of a rod strip having a fixed finite-length section on one of its front surfaces, we have shown that when studying deformation processes with consideration of the compliance of the fixed section, it is necessary to take into account the change in the stress–strain parameters and the mathematical models used for their description. This change occurs across the boundary between the unfixed and fixed sections. Within the framework of the classical Kirchhoff–Love model, it is impossible to take into account the compliance of the fixed section of the rod. However, within the framework of the refined Timoshenko shear model, this is possible if the section is fixed only on one of the front surfaces. Exact analytical solutions were found for two simple linear problems of static transverse bending of a flat rod with fixed sections of finite length on one of the front surfaces. One-dimensional finite elements were constructed for modeling unfixed sections of flat rods and sections fixed on one of the front surfaces within the framework of the refined Timoshenko shear model. Numerical experiments were performed, showing the necessity of taking into account the change in the rod strain-stress parameters across the boundary between fixed and unfixed sections.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"308 - 324"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4089750","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
INTERACTION OF A PRESSURE WAVE IN A CYLINDRICAL CHANNEL WITH A SPHERICAL BUBBLE CLUSTER 圆柱形通道内压力波与球形泡团的相互作用
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020104
M. N. Galimzyanov, I. K. Gimaltdinov, E. Yu. Kochanova
{"title":"INTERACTION OF A PRESSURE WAVE IN A CYLINDRICAL CHANNEL WITH A SPHERICAL BUBBLE CLUSTER","authors":"M. N. Galimzyanov,&nbsp;I. K. Gimaltdinov,&nbsp;E. Yu. Kochanova","doi":"10.1134/S0021894423020104","DOIUrl":"10.1134/S0021894423020104","url":null,"abstract":"<p>The interaction of a stepwise pressure wave with a spherical gas–liquid cluster in a cylindrical channel filled with a liquid has been studied numerically. It has been shown that the cluster generates a large-amplitude solitary pressure wave. The influence of the bubble cluster on the dynamics of multiple reflection of the pressure wave from the boundaries of the cylindrical channel has been investigated. The results of numerical calculations are in good agreement with experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"258 - 265"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091048","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 OF THE FLOW AROUND AN AXISYMMETRIC BODY IN THE ABSENCE OF FREE BOUNDARIES OF THE FLOW 无自由边界的轴对称体绕流的模拟
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2023-06-02 DOI: 10.1134/S0021894423020049
V. I. Kornilov, A. N. Popkov
{"title":"SIMULATION OF THE FLOW AROUND AN AXISYMMETRIC BODY IN THE ABSENCE OF FREE BOUNDARIES OF THE FLOW","authors":"V. I. Kornilov,&nbsp;A. N. Popkov","doi":"10.1134/S0021894423020049","DOIUrl":"10.1134/S0021894423020049","url":null,"abstract":"<p>Results of experimental and numerical investigations of the flow around an elongated axisymmetric body of revolution in a low-velocity wind tunnel with a closed test section and in a free flow are reported. The Reynolds number based on the body length is varied in the interval from <span>(2.75cdot 10^6)</span> to <span>(9.40cdot 10^6)</span>. The problem is solved numerically under the assumption of an axisymmetric steady incompressible flow with the use of the ANSYS Fluent software. It is demonstrated that the test section walls produce a significant effect on the flow character and aerodynamic performances of the body of revolution for the case where the blockage factor of the test section by the body of revolution is formally within 2%.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"64 2","pages":"198 - 207"},"PeriodicalIF":0.6,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4433350","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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