Fluid Dynamics最新文献_第6页

Experimental Study of Machine-Free Energy Separation Methods in a Single-Phase Compressible Gas Flow 单相可压缩气体流动中机器自由能分离方法的实验研究

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S001546282560107X

A. G. Zditovets, S. S. Popovich, N. A. Kiselev, Yu. A. Vinogradov

引用次数: 0

Fine Structure Evolution of the Merging Pattern of a Compound Droplet in the Impact Mode 冲击模式下复合液滴合并模式的精细结构演化

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825601172

S. K. Khaiirbekov, A. Yu. Ilinykh

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Capillary and Gravity Surface Waves with Accompanied Ligaments: Asymptotic Theory and Drop Impact Experiment 伴有韧带的毛细血管和重力表面波：渐近理论和跌落冲击实验

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825601044

Yu. D. Chashechkin, A. A. Ochirov

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Boundary Conditions for Transport Problems on the Evaporation Surface 蒸发面上输运问题的边界条件

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825601019

V. Yu. Levashov, A. P. Kryukov

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Numerical Study of Flow Structure in an Axisymmetric Channel with Injection of a Radial Jet along the Coanda Surface 沿康达面注入径向射流时轴对称通道内流动结构的数值研究

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S001546282460473X

M. A. Pakhomov, N. P. Skibina, V. I. Terekhov

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Study on the Flow Evolution of Supersonic Cooling Film at Various Mach Numbers over a Curved Wall 不同马赫数下超声速冷却膜在弯曲壁上的流动演化研究

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825600403

Z. Zhang, S. H. Yi, X. L. Liu, C. Y. Han

{"title":"Study on the Flow Evolution of Supersonic Cooling Film at Various Mach Numbers over a Curved Wall","authors":"Z. Zhang, S. H. Yi, X. L. Liu, C. Y. Han","doi":"10.1134/S0015462825600403","DOIUrl":"10.1134/S0015462825600403","url":null,"abstract":"To mitigate the adverse effects of aerodynamic heating on hypersonic vehicles, a tangential supersonic cooling film is typically used. This study investigates the impacts of the cooling film’s Mach number (Mj) on the flow field structure. Two supersonic cooling film configurations, with the Mach numbers of 2.0 and 2.3, were designed and tested in a supersonic wind tunnel at the freestream Mach number M = 3.8. The flow field structure was obtained using nanotracer-based planar laser scattering (NPLS), and the wall pressure were derived using an experimentally validated numerical simulation method. The results demonstrate that in the mixing layer at Mj = 2.0 instability between the freestream and the supersonic cooling film develops earlier than that at Mj = 2.3, occurring under an identical ratio of the static pressure (RSP) conditions. On convex surfaces, as the radius of curvature decreases, the influence of the cooling film’s M on ΔP/Pin diminishes; conversely, on concave surfaces, as the radius of curvature decreases, the influence of the cooling film’s M on ΔP/Pin increases. Beyond x = 240 mm, the development over curved surfaces becomes pronounced, and the static pressure of the supersonic cooling film has minimum impact on the wall pressure. Variation in the wall pressure is affected by both the coverage length and the curvature of the supersonic cooling film, and for the cooling film the higher Mj achieves a longer coverage length.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 3","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166845","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 Modeling of Flow Laminarization in Channels with a Negative Pressure Gradient 负压力梯度通道流动层流化数值模拟

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825601068

V. G. Lushchik, A. I. Reshmin

引用次数: 0

Effect of Dissolved Substances on the Size of Water Droplets in Levitating Droplet Clusters 悬浮液滴簇中溶解物质对水滴大小的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S001546282560097X

A. A. Fedorets, E. E. Kolmakov, D. N. Medvedev, V. O. Mayorov, L. A. Dombrovsky

引用次数: 0

Evolution of Thermal Fields on a Streamlined Surface Heated by a Shock Wave and Plasma of a Pulsed Surface Discharge 激波和脉冲表面放电等离子体加热流线型表面的热场演化

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825601081

I. A. Znamenskaya, M. I. Muratov, M. A. Bogdanova, E. A. Karnozova, N. N. Sysoev

{"title":"Evolution of Thermal Fields on a Streamlined Surface Heated by a Shock Wave and Plasma of a Pulsed Surface Discharge","authors":"I. A. Znamenskaya, M. I. Muratov, M. A. Bogdanova, E. A. Karnozova, N. N. Sysoev","doi":"10.1134/S0015462825601081","DOIUrl":"10.1134/S0015462825601081","url":null,"abstract":"An experimental study was conducted to investigate the thermal fields in the boundary layer along the wall of a gas-dynamic channel near a rectangular insert. The study focused on conditions following the passage of a shock wave and during the initiation of a pulsed surface discharge in the flow. The heating and cooling dynamics of the region affected by the pulsed sliding discharge along the dielectric surface in the flow separation zone were examined. Registration of the radiation of the channel walls in the range of 1.5–5.1 µm was carried out through the side windows of the test (discharge) chamber of the shock tube, transparent both for the thermal radiation of the walls and for the visible radiation of the discharge. It is shown that the cooling of the insert region, heated by a localized nanosecond discharge in the leeward zone, occurs in less than a millisecond; on the shock-heated surface of the channel in the windward zone of the insert, cooling occurs in several milliseconds. The study measured radiative, conductive and convective components of heat fluxes in various supersonic flow configurations. The experiments were conducted in the range of shock wave Mach numbers ({{{text{M}}}_{0}} = 2{-} 4) and high-speed flows behind them, respectively, with Mach numbers ({text{M}} = 1.1{-} 1.4).","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 3","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166842","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 One-Sided Convection in a Porous Medium Using a Nonlinear Equation of State 用非线性状态方程模拟多孔介质中单侧对流

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2025-07-20 DOI: 10.1134/S0015462825600099

E. B. Soboleva

{"title":"Simulation of One-Sided Convection in a Porous Medium Using a Nonlinear Equation of State","authors":"E. B. Soboleva","doi":"10.1134/S0015462825600099","DOIUrl":"10.1134/S0015462825600099","url":null,"abstract":"One-sided density-driven convection in a porous medium is simulated numerically with reference to hydrodynamic processes occurring during injection of carbon dioxide into underground porous formations. When carbon dioxide dissolves in water or oil, the density of solution increases. This leads to the growth of instability. A hydrodynamic model that includes the continuity equation, the equation of motion (in the form of Darcy equation), and the convection-diffusion equation has been used. The equation of state that relates the density of the fluid phase to the concentration of carbon dioxide is nonlinear. The density of solution reaches a maximum at a certain concentration, which varies. A new computational code based on the finite-difference method has been developed to solve the problem. The effect of the concentration that gives the maximum density on the parameters of convective motion and mass transfer is investigated. In particular, it is found that if the maximum density occurs at a higher concentration, the amount of carbon dioxide that is transported downward by the convective flow increases. This means that, in this case, convective dissolution is more effective in trapping of carbon dioxide at depth.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 3","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166843","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