Thermophysics and Aeromechanics最新文献_第7页

Diffusion combustion of a hydrogen microjet effluxing into air flow from a sphere 氢气微射流从球体喷入气流的扩散燃烧

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050105

V. V. Kozlov, Yu. A. Litvinenko, A. M. Sorokin

引用次数: 0

Flow patterns and energy parameters for a separation flow in a channel with low spanwise ribs 低展向肋通道中分离流的流型和能量参数

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050051

N. S. Dushin

引用次数: 0

Modeling the propagation of liquid droplets in a two-phase wall jet injected through an annular gap into a heated co-current turbulent airflow 模拟液滴在两相壁面射流中通过环形间隙注入加热的共流湍流气流中的传播

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050117

M. A. Pakhomov, V. I. Terekhov, D. H. Kong

{"title":"Modeling the propagation of liquid droplets in a two-phase wall jet injected through an annular gap into a heated co-current turbulent airflow","authors":"M. A. Pakhomov, V. I. Terekhov, D. H. Kong","doi":"10.1134/S0869864325050117","DOIUrl":"10.1134/S0869864325050117","url":null,"abstract":"<div><p>The dynamics of dispersed phase propagation during injection of a gas-droplet wall jet into a co-current turbulent heated airflow is numerically simulated with variations in the droplet mass concentration at the inlet cross-section and their initial diameter. The solution is based on a system of axisymmetric Reynolds-averaged Navier–Stokes (RANS) equations, taking into account the two-phase character of the flow. The Eulerian approach is primarily used to describe the aerodynamics and heat and mass transfer in the gas and dispersed phases. The Lagrangian and full Lagrangian approaches are used in the study for additional verification of the developed mathematical model. A significant effect of the liquid mass concentration on the particle concentration profiles across the channel cross-section is demonstrated. The results obtained using the Eulerian and Lagrangian descriptions are compared. The applicability of both approaches for describing the dynamics and heat transfer of a two-phase wall jet is demonstrated (the difference between two approaches does not exceed 15 %).</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 5","pages":"1139 - 1146"},"PeriodicalIF":0.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196302","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

Stabilization of a supersonic boundary layer by an additive of a polyatomic vibrationally excited and dissociating gas 多原子振动激发解离气体添加剂对超音速边界层的稳定作用

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050026

Yu. N. Grigoryev, I. V. Ershov

{"title":"Stabilization of a supersonic boundary layer by an additive of a polyatomic vibrationally excited and dissociating gas","authors":"Yu. N. Grigoryev, I. V. Ershov","doi":"10.1134/S0869864325050026","DOIUrl":"10.1134/S0869864325050026","url":null,"abstract":"<div><p>Based on a system of gas dynamics equations for a mixture of vibrationally excited chemically reacting molecular gases, the effect of a carbon dioxide additive on the stability of a hypersonic boundary layer of neutral nitrogen on a plate was studied. Calculations were performed for five variants of mixture composition. Steady-state flow parameters were calculated using a locally self-similar approximation of the boundary layer equations. Within the framework of linear stability theory, the dependences of the critical Reynolds numbers Re<sub>δc</sub> and the laminar-turbulent transition Reynolds numbers Re<sub><i>xT</i></sub>* on the molar concentration of the additive were obtained. In particular, for a 50% mixture, the relative increase in both criteria compared to the corresponding values for a mixture of perfect gases is approximately 53%. Moreover, the contribution of CO<sub>2</sub> dissociation to the shift of the laminar-turbulent transition zone is twice as great as the contribution of vibrational mode relaxation. It is shown that the obtained dependence of Re<sub><i>xT</i></sub>* on the molar concentration of the additive correlates with the corresponding experimental results of Professor H. Hornung’s group.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 5","pages":"1029 - 1044"},"PeriodicalIF":0.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196297","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

The effect of two-chamber electrode geometry on gas dynamics in an arc channel of plasmatorch 双腔电极几何形状对等离子火炬电弧通道内气体动力学的影响

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050063

I. D. Grishko, S. P. Vashchenko, D. Yu. Batomunkuev, O. B. Kovalev

{"title":"The effect of two-chamber electrode geometry on gas dynamics in an arc channel of plasmatorch","authors":"I. D. Grishko, S. P. Vashchenko, D. Yu. Batomunkuev, O. B. Kovalev","doi":"10.1134/S0869864325050063","DOIUrl":"10.1134/S0869864325050063","url":null,"abstract":"<div><p>Methods of 3D numerical simulation were applied for evaluating the flow dynamics in the internal electrode of a plasmatorch with a two-chamber design while a “cold” blowout through the electrode. This study presents spatial distributions for the gas flow velocity, turbulence kinetic energy and the pressure inside the two-chamber electrode equipped with two swirlers (they provide tangential input for plasma-forming air flow). Variations in the gas velocity for transversal cross sections of the arc chamber are in agreement with previously published data for the case of “cold” smoke-based blowout of the two-chamber plasmatorch equipped with a cylindrical electrode. It was established that the cylinder-conical shape of the internal electrode might result in a shorter initial laminar column in the electric arc; this happens due to expansion of the turbulent interval at a fixed length of the arc. Experiments in a plasmatorch with an inter-electrode insert demonstrated that the cylinder-and-cone shape of the electrode causes a higher (by 30–35 %) voltage on the plasmatorch as compared with the cylinder-only shape of the electrode. This is a qualitative confirmation for calculated results about a higher kinetic turbulence energy and a wider turbulent zone of the electric arc occurring in a two-chamber design plasmatorch.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 5","pages":"1083 - 1100"},"PeriodicalIF":0.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196344","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

Mixing in the planar turbulent wakes in passively stratified medium 被动分层介质中平面湍流尾迹的混合

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S086986432505004X

A. G. Demenkov, G. G. Chernykh

引用次数: 0

Study of flow aerodynamics using the LDA method as part of laboratory modeling of wind-wave interaction 利用LDA方法进行气流动力学研究，作为风波相互作用实验室模拟的一部分

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050166

I. K. Kabardin, V. G. Meledin, S. V. Dvoynishnikov, M. R. Gordienko, K. S. Zubanov, A. T. Yanchat, V. V. Rakhmanov, S. V. Kakaulin, D. V. Shurshin, V. O. Zuev, I. M. Kraev, D. A. Sergeev, Yu. I. Troitskaya

{"title":"Study of flow aerodynamics using the LDA method as part of laboratory modeling of wind-wave interaction","authors":"I. K. Kabardin, V. G. Meledin, S. V. Dvoynishnikov, M. R. Gordienko, K. S. Zubanov, A. T. Yanchat, V. V. Rakhmanov, S. V. Kakaulin, D. V. Shurshin, V. O. Zuev, I. M. Kraev, D. A. Sergeev, Yu. I. Troitskaya","doi":"10.1134/S0869864325050166","DOIUrl":"10.1134/S0869864325050166","url":null,"abstract":"<div><p>The development of optoelectronic methods for measuring through a multiphase barrier in the study of a dispersed component in experiments on modeling the natural and technical hydrodynamic systems is a pressing issue. The difficulties of direct measurements under hurricane conditions necessitate laboratory measurements. Spray formation was studied in detail during the laboratory experiments in the high-speed wind-wave flume (WWF) at the Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS). A modern, non-contact optical method for diagnosing two-phase flows — laser Doppler anemometry (LDA) — was used to measure the kinematic characteristics of the aerosol flow. Experiments were carried out to measure the aerosol droplet aerodynamics in WWF of IAP RAS. It was demonstrated that the measuring system enables to measure all three components of the aerodynamic flow velocity through a multiphase barrier at wind speeds from 10 to 40 m/s over a wide range of conditions. The results of measurements were compared with the readings of the Pitot tube, and good agreement and reproducibility of the experimental data were shown.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 5","pages":"1181 - 1186"},"PeriodicalIF":0.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196347","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

An experimental study of starch dispersion during rapid vacuuming 快速抽真空过程中淀粉分散的实验研究

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050154

I. V. Yarygin, V. N. Yarygin, V. G. Prikhodko, A. A. Politov, S. A. Novopashin

引用次数: 0

Features of the ejection of rarefied gas binary jets under condensation conditions 冷凝条件下稀薄气体二元射流的喷射特征

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050130

A. E. Zarvin, A. S. Yaskin, V. V. Kalyada, K. A. Dubrovin

引用次数: 0

Development of electro impedance diagnostic method to study the hydrodynamics of polydisperse pulp 电阻抗诊断方法在多分散纸浆流体力学研究中的应用

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2026-06-09 DOI: 10.1134/S0869864325050087

I. K. Kabardin, P. D. Lobanov, V. G. Glavny, V. G. Meledin, N. A. Pribaturin, M. R. Gordienko, A. D. Rotar, K. S. Zubanov, S. M. Volkov, V. V. Rakhmanov, S. V. Kakaulin, I. A. Evdokimenko

{"title":"Development of electro impedance diagnostic method to study the hydrodynamics of polydisperse pulp","authors":"I. K. Kabardin, P. D. Lobanov, V. G. Glavny, V. G. Meledin, N. A. Pribaturin, M. R. Gordienko, A. D. Rotar, K. S. Zubanov, S. M. Volkov, V. V. Rakhmanov, S. V. Kakaulin, I. A. Evdokimenko","doi":"10.1134/S0869864325050087","DOIUrl":"10.1134/S0869864325050087","url":null,"abstract":"<div><p>An experimental study of polydisperse pulp hydrodynamics is relevant for the tasks of aluminum production. The diagnostics method of matrix electrical impedance has been developed based on the synchronous recording of the spatial distribution of parameters of the complex conductivity and dielectric permittivity of the medium at the nodes of a wire mesh. This method allows for the study of three-dimensional flows of a multiphase model. The core of the measuring system is a matrix mesh electrical impedance sensor consisting of coordinate-linked sets of conductors whose spatial intersections form the measuring nodes of the system. The tracer is a liquid with a complex electrical conductivity different from that of the main flow. During the measurements, impedances are dynamically recorded at each three-dimensional spatial node of the mesh, determining the parameters of multiphase flows. The study experimentally demonstrated the feasibility of measuring impurity propagation during mixing in liquids with a dynamic range extended to 90 dB.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"32 5","pages":"1113 - 1118"},"PeriodicalIF":0.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196300","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