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REACTIVE HOT PRESSING OF B4C–CrB2 CERAMICS AND ITS MECHANICAL PROPERTIES B4C-CrB2 陶瓷的反应热压及其力学性能
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020068
D. V. Dik, T. S. Gudyma, A. A. Filippov, V. M. Fomin, Yu. L. Krutskii
{"title":"REACTIVE HOT PRESSING OF B4C–CrB2 CERAMICS AND ITS MECHANICAL PROPERTIES","authors":"D. V. Dik,&nbsp;T. S. Gudyma,&nbsp;A. A. Filippov,&nbsp;V. M. Fomin,&nbsp;Yu. L. Krutskii","doi":"10.1134/S0021894424020068","DOIUrl":"10.1134/S0021894424020068","url":null,"abstract":"<p>Ceramic composites based on B<sub>4</sub>C with a CrB<sub>2</sub> mole fraction of 0–30% were obtained by reactive hot pressing of a mixture of B<sub>4</sub>C, Cr<sub>2</sub>O<sub>3</sub>, and nanofibrous carbon at a uniaxial pressure of 17.5 MPa and a temperature of 2000 °C for 10 min. The possibility of boron carbide reduction of metal oxide during hot pressing was studied. During the synthesis of CrB<sub>2</sub>, the density of B<sub>4</sub>C was found to increase due to the formation of the CrB<sub>2</sub>–B<sub>4</sub>C eutectic liquid phase. The relative density of all B<sub>4</sub>C–CrB<sub>2</sub> composites obtained under these conditions exceeds 90%. Experimental dependences of the microhardness and elastic modulus of samples on the concentration of the CrB<sub>2</sub> plastic phase were obtained. The dependences of the elastic modulus of the heterogeneous material on the volume fraction of chromium diboride were determined taking into account porosity by sequentially using the Reuss and Voigt averaging schemes.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"249 - 256"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555235","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 INVESTIGATION OF THE MECHANICAL CHARACTERISTICS OF PHOTOLUMINESCENT COMPOSITE MATERIALS 光致发光复合材料力学特性的实验研究
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S002189442402007X
V. M. Fomin, T. A. Brusentseva, S. E. Lukin, A. N. Bagretsova
{"title":"EXPERIMENTAL INVESTIGATION OF THE MECHANICAL CHARACTERISTICS OF PHOTOLUMINESCENT COMPOSITE MATERIALS","authors":"V. M. Fomin,&nbsp;T. A. Brusentseva,&nbsp;S. E. Lukin,&nbsp;A. N. Bagretsova","doi":"10.1134/S002189442402007X","DOIUrl":"10.1134/S002189442402007X","url":null,"abstract":"<p>Crystal 85-5 epoxy resin modified with MHG-4E photoluminescent powder (average particle size 5–15 <span>(mu)</span>m) and FV-530D photoluminescent powders (average particle size 25 <span>(mu)</span>m) photoluminescent powders were studied by mechanical uniaxial tension and three-point bending tests. The dependence of the elastic modulus on filler concentration was obtained. The photoluminescent properties of the resulting composites were examined. The dependence of the afterglow intensity on filler content in the composite was determined.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"257 - 264"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906092","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
OPTIMIZATION OF THE TANGENTIAL JET BLOWING ON A TRANSONIC AIRFOIL FOR BUFFET CONTROL 跨声速翼型切向喷流的颤振控制优化
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020020
K. A. Abramova, V. G. Soudakov
{"title":"OPTIMIZATION OF THE TANGENTIAL JET BLOWING ON A TRANSONIC AIRFOIL FOR BUFFET CONTROL","authors":"K. A. Abramova,&nbsp;V. G. Soudakov","doi":"10.1134/S0021894424020020","DOIUrl":"10.1134/S0021894424020020","url":null,"abstract":"<p>Optimization of tangential jet blowing on the upper surface of a supercritical transonic airfoil under buffet conditions was carried out. Two-dimensional unsteady Reynolds-averaged Navier–Stokes equations were solved to simulate the flow past the airfoil. The Spalart–Allmaras turbulence model was used to close the equations. The location of the slot nozzle and the intensity of the jet blowing from it were varied. The optimal location for blowing with minimum jet intensity to suppress buffet was determined.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"202 - 209"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906095","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
SOLUTION TO A COUPLED PROBLEM OF THERMOMECHANICAL CONTACT OF FUEL ELEMENTS 燃料元件热机械接触耦合问题的解决方案
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020081
M. P. Galanin, A. S. Rodin
{"title":"SOLUTION TO A COUPLED PROBLEM OF THERMOMECHANICAL CONTACT OF FUEL ELEMENTS","authors":"M. P. Galanin,&nbsp;A. S. Rodin","doi":"10.1134/S0021894424020081","DOIUrl":"10.1134/S0021894424020081","url":null,"abstract":"<p>A problem of mathematical simulation of a fuel element region, including many fuel pellets and a cladding fragment, is considered in an axisymmetric formulation. It is assumed that the cladding is a thermoelastic-plastic body and that the pellet is a thermoelastic body with account for cracking of the material. Different variants of the domain decomposition method are used to numerically simulate the thermal and mechanical contact of pellets with each other and with the cladding. Calculation results are presented, in which the region containing ten pellets reaches a nominal power and the effect of pellet cracking on the thermomechanical state of the fuel element is estimated.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"265 - 273"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555236","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
STATE OF ART AND PROSPECTS OF INVESTIGATING THE POSSIBILITY OF TURBULENT BOUNDARY LAYER CONTROL BY AIR BLOWING ON A BODY OF REVOLUTION (REVIEW) 研究用空气对旋转体进行湍流边界层控制的可能性的技术现状和前景（综述）
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020019
V. I. Kornilov, A. N. Popkov
{"title":"STATE OF ART AND PROSPECTS OF INVESTIGATING THE POSSIBILITY OF TURBULENT BOUNDARY LAYER CONTROL BY AIR BLOWING ON A BODY OF REVOLUTION (REVIEW)","authors":"V. I. Kornilov,&nbsp;A. N. Popkov","doi":"10.1134/S0021894424020019","DOIUrl":"10.1134/S0021894424020019","url":null,"abstract":"<p>Investigations (mainly those performed by the authors) of air blowing through a perforated section on a body of revolution with a large aspect ratio in an axisymmetric incompressible flow are summarized. Result of numerical and experimental studies of the flow properties, efficiency of the turbulent boundary layer control and prospects of using it for a body of revolution at low subsonic velocities equivalent to the take-off and landing regimes for a modern subsonic cargo aircraft are analyzed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"183 - 201"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540616","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
ASYMPTOTIC METHOD FOR DETERMINING ENERGY DISSIPATION AND DRAG COEFFICIENT IN A PERIODIC FLUID FLOW AROUND PLATES 确定绕板周期性流体流动中能量耗散和阻力系数的渐近方法
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020044
V. A. Buzhinskii
{"title":"ASYMPTOTIC METHOD FOR DETERMINING ENERGY DISSIPATION AND DRAG COEFFICIENT IN A PERIODIC FLUID FLOW AROUND PLATES","authors":"V. A. Buzhinskii","doi":"10.1134/S0021894424020044","DOIUrl":"10.1134/S0021894424020044","url":null,"abstract":"<p>A periodic flow of an incompressible fluid around plates at high Reynolds numbers and low Keulegan–Carpenter numbers is considered. Energy dissipation per oscillation period and drag coefficient of plates are determined. The two-dimensional problems under study are a problem of translational and angular oscillations of a flat plate and a plate shaped as a circular arc, a problem of translational oscillations of a circular cylinder with symmetrically located edges, a problem of angular oscillations of cruciform plates, and a problem of a periodic flow around an inclined edge on a flat wall. Also, a three-dimensional problem of translational and angular oscillations of a thin circular disk is considered. All the resulting dependences for energy dissipation and drag coefficient are presented in analytical form via velocity intensity factors, which characterize the velocity singularity at the sharp edges of the plates with a potential flow around an ideal fluid. Some of the resulting dependences are compared with the available numerical and experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"220 - 232"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906094","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
SURFACE CONSTANT-TEMPERATURE ANEMOMETER SENSORS USED TO ANALYZE PARTICLE IMAGE VELOCIMETRY DATA 表面恒温风速传感器用于分析粒子图像测速数据
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020093
O. I. Vishnyakov, P. A. Polivanov, D. A. Bountin
{"title":"SURFACE CONSTANT-TEMPERATURE ANEMOMETER SENSORS USED TO ANALYZE PARTICLE IMAGE VELOCIMETRY DATA","authors":"O. I. Vishnyakov,&nbsp;P. A. Polivanov,&nbsp;D. A. Bountin","doi":"10.1134/S0021894424020093","DOIUrl":"10.1134/S0021894424020093","url":null,"abstract":"<p>This paper describes a new method for performing the time-frequency analysis of particle image velocimetry data with account for surface constant-temperature anemometer sensor readings. This method is based on calculating correlation coefficients between particle image velocimetry data and constant-temperature anemometer data, previously filtered in a given frequency range. This approach makes it possible to obtain data on the unsteady characteristics of flows throughout the entire measurement range in a frequency range whose boundaries extend beyond the boundaries of the particle image velocimetry frequency range. The proposed method is applied to study nonstationary processes in a region where a shock wave interacts with a boundary layer at a Mach number M = 1.43.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"274 - 278"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906093","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
HYDRODYNAMICS OF NON-MAGNETIC DROPLETS IN MAGNETIC FLUIDS IN MICROFLUIDIC CHIPS UNDER THE INFLUENCE OF INHOMOGENEOUS MAGNETIC FIELDS 非均相磁场影响下微流控芯片磁性流体中非磁性液滴的流体力学
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020032
P. A. Ryapolov, E. A. Sokolov, D. A. Kalyuzhnaya, E. V. Sheldeshova, I. A. Shabanova
{"title":"HYDRODYNAMICS OF NON-MAGNETIC DROPLETS IN MAGNETIC FLUIDS IN MICROFLUIDIC CHIPS UNDER THE INFLUENCE OF INHOMOGENEOUS MAGNETIC FIELDS","authors":"P. A. Ryapolov,&nbsp;E. A. Sokolov,&nbsp;D. A. Kalyuzhnaya,&nbsp;E. V. Sheldeshova,&nbsp;I. A. Shabanova","doi":"10.1134/S0021894424020032","DOIUrl":"10.1134/S0021894424020032","url":null,"abstract":"<p>This paper presents the results of a study of the influence of various sources of magnetic field on the size of droplets formed in microfluidic flows. Direct and reverse emulsions in a microfluidic flow focusing were obtained using magnetic fluids based on oil and water which are a continuous phase. Non-magnetic inclusions of various volumes were formed depending on the selected parameters: continuous phase flow rate, magnetic field configuration, and the position of the magnet relative to the axis of the device.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"210 - 219"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555237","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
COMPARISON OF RESULTS OF RANS AND ILES BASED CALCULATIONS FOR A THICK TEARDROP AIRFOIL AT LOW REYNOLDS NUMBERS 在低雷诺数的一个厚泪滴翼型的rans和iles基于计算结果的比较
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-10-28 DOI: 10.1134/S0021894424020056
M. A. Akimov, P. A. Polivanov, A. A. Sidorenko
{"title":"COMPARISON OF RESULTS OF RANS AND ILES BASED CALCULATIONS FOR A THICK TEARDROP AIRFOIL AT LOW REYNOLDS NUMBERS","authors":"M. A. Akimov,&nbsp;P. A. Polivanov,&nbsp;A. A. Sidorenko","doi":"10.1134/S0021894424020056","DOIUrl":"10.1134/S0021894424020056","url":null,"abstract":"<p>A flow around a symmetrical thick teardrop airfoil in a nonstationary formulation is numerically modeled at Reynolds numbers <span>(mathrm{Re}=10^4{-}10^5)</span> and in a range of angles of attack <span>(alpha=~-10{-}10^circ)</span>. Calculations are based on the approximation of unsteady Reynolds-averaged Navier–Stokes (URANS) equations using the implicit large-eddy simulation (ILES). The URANS approach requires that the position of a laminar-turbulent transition is determined using <span>(k{-}kl{-}omega)</span> and <span>(k{-}omega{-}gamma{-}mathrm{Re}_theta)</span> models, as well as (<span>(k{-}omega)</span>)-SST models with a given laminar flow region. It is shown that the flow pattern and aerodynamic characteristics of the airfoil are greatly affected by the position of the laminar-turbulent transition region. It is suggested by the comparison of the results obtained using the ILES approach with experimental data that they are in good agreement. The URANS based calculations do not yield results consistent with experimental data. Fixing the laminar-turbulent transition point in the URANS calculation in some cases make it possible to correct the results.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 2","pages":"233 - 248"},"PeriodicalIF":0.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906096","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
FORMATION OF CHAIN CLUSTERS DURING BUBBLE MOTION FROM A SINGLE CAPILLARY IN AN INCLINED PIPE 倾斜管道中的单个毛细管在气泡运动过程中形成链簇
IF 0.5 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2024-08-21 DOI: 10.1134/S0021894424010127
A. E. Gorelikova, O. N. Kashinsky, A. V. Chinak
{"title":"FORMATION OF CHAIN CLUSTERS DURING BUBBLE MOTION FROM A SINGLE CAPILLARY IN AN INCLINED PIPE","authors":"A. E. Gorelikova,&nbsp;O. N. Kashinsky,&nbsp;A. V. Chinak","doi":"10.1134/S0021894424010127","DOIUrl":"10.1134/S0021894424010127","url":null,"abstract":"<p>The sizes and rise velocity of bubbles in a stationary liquid in an inclined channel with a circular cross-section at different gas flow rates through a capillary were determined (3.0–5.5 ml/min). The size and velocity of gas bubbles were studied by shadow photography. It is shown that in the range of channel inclination angles 40–60°, the formation of stable bubble structures—clusters consisting of bubbles of the same size (1.5–1.8 mm) — is possible. In regimes without the formation of chain clusters, the average diameter of gas bubbles increased (2.0–2.2 mm) due to their coalescence.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"65 1","pages":"105 - 111"},"PeriodicalIF":0.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200223","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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