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Method for Determining the Aerodynamic Roll Damping of Blunt Bodies at Supersonic Speeds 超音速钝体气动侧倾阻尼的确定方法
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700045
N. P. Adamov, E. A. Chasovnikov
{"title":"Method for Determining the Aerodynamic Roll Damping of Blunt Bodies at Supersonic Speeds","authors":"N. P. Adamov,&nbsp;E. A. Chasovnikov","doi":"10.1134/S0021894426700045","DOIUrl":"10.1134/S0021894426700045","url":null,"abstract":"<p>A test rig for studying the free circular rotation of blunt bodies around their longitudinal axis is described. A method for determining the rolling moment in wind tunnel tests is presented. A method for determining the equivalent aerodynamic roll damping coefficient has been developed assuming that the viscous friction torque in rolling bearings is independent of the axial load. For a segmental-conical body, the experimental value of the coefficient is shown to be close to the calculated value determined by numerical integration of continuum equations in a quasi-steady approximation. This proposed method can be used to determine the roll damping moment of reentry vehicles, which is necessary for solving flight dynamics problems.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"25 - 29"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146889","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 Passive Perturbation on the Local Flow Structure of a Bubbly Turbulent Flow behind a Backward-Facing Step 被动扰动对后向台阶后气泡湍流局部流动结构的影响
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700148
M. A. Pakhomov
{"title":"Influence of Passive Perturbation on the Local Flow Structure of a Bubbly Turbulent Flow behind a Backward-Facing Step","authors":"M. A. Pakhomov","doi":"10.1134/S0021894426700148","DOIUrl":"10.1134/S0021894426700148","url":null,"abstract":"<p>A numerical study is performed to investigate the effect of a perturbation generated by a vortex-generator rib on the local flow structure and turbulence of a bubbly flow in a plane channel behind a backward-facing step. The Eulerian approach is used to describe the flow dynamics and the heat and mass transfer in both the gas and dispersed phases. The problem is solved using the Reynolds-averaged Navier–Stokes equations, which are written to account for the presence of bubbles. The effects of bubble concentration, initial bubble diameter, and vortex-generator rib height on the turbulent flow structure and the length of the separated zone are examined. The presence of the vortex-generator rib causes a significant (twofold) increase in the turbulence level in both single-phase and two-phase bubbly separated flows. The rib also has a marked effect on turbulence in the separated flow, with the turbulence level increasing by up to 60%. The addition of bubbles reduces the length of the recirculation zone (by 60% for <span>(Delta {text{/}}H = 1{text{/}}3)</span>).</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"148 - 160"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146901","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
On the Mechanism of Formation of Streamwise Vortices in a Supersonic Jet Issuing from a Radial Nozzle 超声速径向喷管射流中流向涡的形成机理研究
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700094
S. P. Kiselev, V. P. Kiselev, V. N. Zaikovskii, G. V. Trubacheev
{"title":"On the Mechanism of Formation of Streamwise Vortices in a Supersonic Jet Issuing from a Radial Nozzle","authors":"S. P. Kiselev,&nbsp;V. P. Kiselev,&nbsp;V. N. Zaikovskii,&nbsp;G. V. Trubacheev","doi":"10.1134/S0021894426700094","DOIUrl":"10.1134/S0021894426700094","url":null,"abstract":"<p>The mechanism of formation of streamwise vortices in a supersonic jet issuing from an axisymmetric radial nozzle has been investigated. Numerical simulation of the gas flow has shown that these vortices arise when gas flows from the settling chamber into the inlet channel through a series of holes in a direction perpendicular to the axis of symmetry of the radial nozzle. The resulting vortices are transferred by the gas flow from the inlet channel into the radial nozzle and then to the supersonic jet issuing from this nozzle. The numerical results are in satisfactory agreement the experimental data.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"102 - 110"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146890","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
Model Development and Verification of Drill String Simulation Results for Stick-Slip Oscillations 钻柱粘滑振荡仿真模型建立与验证
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S002189442670015X
O. S. Bukashkina, V. S. Tikhonov
{"title":"Model Development and Verification of Drill String Simulation Results for Stick-Slip Oscillations","authors":"O. S. Bukashkina,&nbsp;V. S. Tikhonov","doi":"10.1134/S002189442670015X","DOIUrl":"10.1134/S002189442670015X","url":null,"abstract":"<p>A model for coupled axial-torsional oscillations of a drill string in a borehole of arbitrary profile is proposed. A numerical solution scheme is developed. A comparative analysis of the simulation results and field test data is performed. The main factors influencing the onset of stick-slip oscillations are identified as the intrinsic specific energy of the rock and the rotor speed. Comparison of the calculated results with field measurements demonstrates the adequacy of the model, with an accuracy acceptable for practical applications.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"161 - 172"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146903","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
Determination of Bending Stresses in Steel Specimens by an Acoustoelastic Method Using Rayleigh Surface Waves 用瑞利表面波声弹性法测定钢试样的弯曲应力
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700161
I. V. Erofeeva, V. I. Erofeev, V. M. Rodyushkin
{"title":"Determination of Bending Stresses in Steel Specimens by an Acoustoelastic Method Using Rayleigh Surface Waves","authors":"I. V. Erofeeva,&nbsp;V. I. Erofeev,&nbsp;V. M. Rodyushkin","doi":"10.1134/S0021894426700161","DOIUrl":"10.1134/S0021894426700161","url":null,"abstract":"<p>This paper presents the results of an experimental study of acoustoelasticity occuring during the propagation of ultrasonic Rayleigh surface waves in a field of static bending stresses. For a St. 20 steel sample, it is shown that the acoustoelastic effect differs under compression and tension. A calibration curve is constructed for Rayleigh surface waves, enabling their use of to monitor bending stresses, which is impossible with volumetric probing.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"173 - 178"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146907","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
A Hydrodynamic Flow Loop for Modeling Pulsating Viscous Flow in Elastic Blood Vessel Phantoms 弹性血管模型中脉动粘性流动的流体动力流环
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700173
D. V. Parshin
{"title":"A Hydrodynamic Flow Loop for Modeling Pulsating Viscous Flow in Elastic Blood Vessel Phantoms","authors":"D. V. Parshin","doi":"10.1134/S0021894426700173","DOIUrl":"10.1134/S0021894426700173","url":null,"abstract":"<p>A gravity-based hydrodynamic flow loop capable of generating both steady and unsteady flow conditions is presented. The setup achieves velocities up to 16 cm/s and pressure fluctuations in the range of 60–130 mm Hg within the measurement zone, enabling hemodynamic studies of virtually any segment of the cardiovascular system. For the first time, flow rate control is achieved by varying the angle at the junction of the systolic and diastolic flow circuits of the loop. Independent control of the minimum and maximum pressure in the unsteady flow is also implemented.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"179 - 188"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146915","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
Using Passive Flow Control Methods for an Asymmetric Airfoil in Turbulent Flow 非对称翼型在湍流中的被动流动控制方法
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700070
V. I. Kornilov, A. N. Popkov
{"title":"Using Passive Flow Control Methods for an Asymmetric Airfoil in Turbulent Flow","authors":"V. I. Kornilov,&nbsp;A. N. Popkov","doi":"10.1134/S0021894426700070","DOIUrl":"10.1134/S0021894426700070","url":null,"abstract":"<p>This paper investigates the feasibility of controlling turbulent incompressible flow around an asymmetric Clark Z airfoil by passive blowing of air through perforated surface areas from high-pressure regions to low-pressure regions, as well as by supplying an external pressure flow through the airfoil leading edge and then directing it to the lower side of the airfoil. The studies are performed for chord-based Reynolds numbers <span>({text{R}}{{{text{e}}}_{c}} = (0.40{-} 1.28) times {{10}^{6}})</span> and angles of attack ranging from –6° to 6°. It is shown that this control method is ambiguous and highly sensitive to the extent of the mass-transfer region, its chordwise position, the angle of attack, and the Reynolds number. However, in some cases, it provides a 4–5% reduction in the airfoil profile drag and an increase in its lift, which improves the airfoil aerodynamic efficiency.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"77 - 90"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146906","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
Distributed Vortex–Roughness Receptivity of a Swept-Wing Boundary Layer: 2. Receptivity Characteristics 后掠翼边界层分布涡-粗糙度接受度研究。感受性特征
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700069
V. I. Borodulin, Yu. S. Kachanov, A. P. Roshchektaev
{"title":"Distributed Vortex–Roughness Receptivity of a Swept-Wing Boundary Layer: 2. Receptivity Characteristics","authors":"V. I. Borodulin,&nbsp;Yu. S. Kachanov,&nbsp;A. P. Roshchektaev","doi":"10.1134/S0021894426700069","DOIUrl":"10.1134/S0021894426700069","url":null,"abstract":"<p>The distributed receptivity of a swept-wing laminar boundary layer to unsteady free-stream vortices with streamwise vorticity in the presence of spanwise-uniform surface roughness has been investigated experimentally. The experiments were performed on a 25-degree swept-wing model under fully controlled disturbance conditions. It has been found that unsteady streamwise flow vortices can lead to very efficient streamwise-distributed excitation of unsteady crossflow instability modes at combination spanwise wavenumbers due to vortex scattering on surface roughness. Part 1 of this study (published in the previous issue of the journal) is devoted to describing the experimental approach and its theoretical justification; the experimental setup; the base-flow structure; the excitation method and characteristics of free-stream and surface disturbances; experimental evidence of the high efficiency of the receptivity mechanism under study; and experimental confirmation of the important role of streamwise wavenumber resonance in the excitation of the most amplified crossflow instability modes. Part 2 of this study (this article) is devoted to the experimental evaluation of the amplitudes and phases of distributed vortex–roughness receptivity coefficients as a function of disturbance frequency and spanwise wavenumber. In addition, the receptivity coefficients responsible for the excitation of crossflow waves on a smooth surface are obtained, and the relative efficiencies of the distributed vortex receptivity and vortex–roughness receptivity mechanisms are compared. The results are also compared with those obtained previously for distributed vortex receptivity on a smooth surface.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"45 - 76"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146887","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
Separated Flow Structure in the Reattachment Region in Supersonic Flow around Compression Corners of Various Configurations 超声速流动中不同构型压缩角附近再附着区的分离流动结构
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700057
V. I. Zapryagaev, I. N. Kavun, L. P. Trubitsyna
{"title":"Separated Flow Structure in the Reattachment Region in Supersonic Flow around Compression Corners of Various Configurations","authors":"V. I. Zapryagaev,&nbsp;I. N. Kavun,&nbsp;L. P. Trubitsyna","doi":"10.1134/S0021894426700057","DOIUrl":"10.1134/S0021894426700057","url":null,"abstract":"<p>This paper presents the results of a computational and experimental study of the vortex structure in the reattachment region of a separated flow at a free-stream Mach number <span>({{{text{M}}}_{infty }} = 6)</span>. Three configurations of the compression corner are considered: a compression corner formed by two flat surfaces, a same compression corner with side walls, and an axisymmetric model. The magnitude of the compression corner is the same in all cases and is 30<span>(^{ circ })</span>. It has been established that the geometry of the model significantly influences the structure and parameters of the vortex flow in the reattachment zone, namely, the presence or absence of near-wall streamwise vortices of the Goertler type, their geometric dimensions, as well as the magnitude of the force and thermal parameters in the reattachment zone.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"30 - 44"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146902","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
Calculation of the Stability Characteristics of a Supersonic Boundary Layer on a Flat-Plate Model with Streamwise Slots of Various Depths 不同深度流槽平板模型上超音速边界层稳定性的计算
IF 0.6 4区 工程技术
Journal of Applied Mechanics and Technical Physics Pub Date : 2026-06-04 DOI: 10.1134/S0021894426700082
V. I. Lysenko, B. V. Smorodskii, A. D. Kosinov, A. A. Yatskikh, G. L. Kolosov, A. D. Yuzenas
{"title":"Calculation of the Stability Characteristics of a Supersonic Boundary Layer on a Flat-Plate Model with Streamwise Slots of Various Depths","authors":"V. I. Lysenko,&nbsp;B. V. Smorodskii,&nbsp;A. D. Kosinov,&nbsp;A. A. Yatskikh,&nbsp;G. L. Kolosov,&nbsp;A. D. Yuzenas","doi":"10.1134/S0021894426700082","DOIUrl":"10.1134/S0021894426700082","url":null,"abstract":"<p>This paper presents the results of the first computational and theoretical study of the influence of logitudinal rectangular slots on a flat-plate surface on boundary-layer stability at a free-tream Mach number <span>({{{text{M}}}_{infty }} = 2)</span>. The slots have different depths (Reynolds number <span>(0 leqslant {{operatorname{Re} }_{h}} leqslant 5400)</span>) and small width compared to the instability wavelength. The mean flow was obtained using the FlowVision computational fluid dynamics code. Calculations using linear stability theory show that increasing the slot depth shifts the frequency range of boundary-layer instability to higher frequencies, while the rate of spatial growth of pulsations becomes lower than in the case of a smooth-surface boundary layer; i.e., the flow stabilizes.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":"67 1","pages":"91 - 101"},"PeriodicalIF":0.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146905","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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