发布求助
文献互助 智能选刊 最新文献

Thermophysics and Aeromechanics最新文献

筛选
英文 中文
Numerical simulation of interaction of a microjet array with a turbulent shear flow 微射流阵列与湍流剪切流相互作用的数值模拟
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040029
V. I. Kornilov, I. V. Menshchikova, A. A. Pivovarov
{"title":"Numerical simulation of interaction of a microjet array with a turbulent shear flow","authors":"V. I. Kornilov,&nbsp;I. V. Menshchikova,&nbsp;A. A. Pivovarov","doi":"10.1134/S0869864323040029","DOIUrl":"10.1134/S0869864323040029","url":null,"abstract":"<div><p>Results of numerical investigations of the characteristics of a turbulent boundary layer in the case of air blowing through a smooth flat perforated surface with a single hole and also through a similar surface with a group of staggered holes 0.18 mm in diameter (<i>d/δ</i>=0.0072) in a low-velocity flow are reported. The Reynolds number Re** based on the momentum thickness <i>δ</i>** ahead of the perforated region is 2600. The blowing coefficient <i>C</i><sub>b</sub> is varied in the interval from zero to 0.0438. The influence of some geometric parameters, in particular, the distance between the hole centers, on the properties of the transverse shear flow for identical intensities of blowing in situations with one hole and with a group of holes is analyzed. All observations reveal stable reduction of local friction whose value varies depending on the number of holes and their arrangement on the surface.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"615 - 630"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139083968","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
Heat transfer and hydraulic resistance of a flat channel with discrete wall roughness in the form of inclined trench dimples 带有倾斜沟槽凹陷形式离散壁面粗糙度的扁平沟槽的传热和水力阻力
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040030
I. A. Davletshin, N. S. Dushin, O. A. Dushina, N. I. Mikheev, R. R. Shakirov, S. A. Isaev
{"title":"Heat transfer and hydraulic resistance of a flat channel with discrete wall roughness in the form of inclined trench dimples","authors":"I. A. Davletshin,&nbsp;N. S. Dushin,&nbsp;O. A. Dushina,&nbsp;N. I. Mikheev,&nbsp;R. R. Shakirov,&nbsp;S. A. Isaev","doi":"10.1134/S0869864323040030","DOIUrl":"10.1134/S0869864323040030","url":null,"abstract":"<div><p>An experimental study of heat transfer and hydraulic losses in a channel with one wall being a surface with trench dimple was carried out. The working surface had four rows of dimples located alternately at angles of 45° and −45° to the channel axis. In the laminar regime, the transfer of heat and the losses of pressure turned out to be close to the parameters of a smooth channel. In the turbulent regime, a 1.5-fold enhancement of heat transfer with respect to the transfer of heat in a smooth channel was obtained. The dependence of the increase in pressure losses on the Reynolds number qualitatively agreeing with the dependence for the channels with sandy roughness is obtained.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"631 - 636"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084118","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 dynamics of the interfacial surface of helium II–vapor in a U-shaped channel U 形通道中氦 II 蒸气界面的动力学特性
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040108
Yu. Yu. Puzina, A. P. Kryukov
{"title":"The dynamics of the interfacial surface of helium II–vapor in a U-shaped channel","authors":"Yu. Yu. Puzina,&nbsp;A. P. Kryukov","doi":"10.1134/S0869864323040108","DOIUrl":"10.1134/S0869864323040108","url":null,"abstract":"<div><p>The paper considers experimental data on the dynamics of superfluid helium in a U-shaped cylindrical channel. An experimental cell and a methodology for investigations, parameter measuring, and obtained data processing are described. When a heat flux is applied near the heater, vapor can appear, and the interfacial surface executes regular oscillations of macroscopic amplitude with a constant frequency. The dependences of the interfacial surface position and the corresponding parameters on time are given. The obtained experimental results are interpreted based on the earlier obtained analytical solution.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"709 - 720"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084120","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
Development of disturbances generated by an electric discharge in the shock wave / boundary layer interaction zone 冲击波/边界层相互作用区放电产生的扰动的发展情况
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040078
O. I. Vishnyakov, P. A. Polivanov, A. A. Sidorenko, A. D. Budovsky
{"title":"Development of disturbances generated by an electric discharge in the shock wave / boundary layer interaction zone","authors":"O. I. Vishnyakov,&nbsp;P. A. Polivanov,&nbsp;A. A. Sidorenko,&nbsp;A. D. Budovsky","doi":"10.1134/S0869864323040078","DOIUrl":"10.1134/S0869864323040078","url":null,"abstract":"<div><p>The paper presents the results of experimental study of disturbances generated by an electric discharge. Observations are carried out in the zone of interaction of a shock wave and a boundary layer (the incident shock wave has the Mach number M = 1.43). Experiments were carried out in a supersonic wind tunnel with the unit Reynolds number Re1 = 11·10<sup>6</sup> 1/m. The flow velocity was measured using the PIV method and hot-wire method. The artificial disturbances are generated by a periodic pulsed electric discharge; the discharge is allocated at the model surface upstream of the interaction zone. The discharge time is less than 100 ns: this enables creating a broadband disturbance inside the boundary layer. The method of phase-locked measurement with the ensemble averaging of realizations produces the spatial and temporal characteristics of disturbances generated in the interaction zone. The major growth of initial disturbances occurs in the shear layer behind the shock wave/boundary layer interaction zone (here the flow becomes turbulent).</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"673 - 681"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084074","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
Study of vortex breakdown in immiscible media using the lattice Boltzmann equations method 利用晶格玻尔兹曼方程法研究不相溶介质中的涡流击穿现象
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040017
M. V. Salnikov, K. S. Kinzin, I. V. Naumov, R. I. Mullyadzhanov
{"title":"Study of vortex breakdown in immiscible media using the lattice Boltzmann equations method","authors":"M. V. Salnikov,&nbsp;K. S. Kinzin,&nbsp;I. V. Naumov,&nbsp;R. I. Mullyadzhanov","doi":"10.1134/S0869864323040017","DOIUrl":"10.1134/S0869864323040017","url":null,"abstract":"<div><p>Numerical simulation is performed for a cylinder-bound two-component liquid flow. Simulation model is based on the method of lattice Boltzmann equations. The collision integral in this model is defined from the MRT approximation. The interaction between liquid components is described by the diffusion interface model with the pseudopotential approximation. The main deficiency of this known approach is the disbalance of discrete forces of two-component interaction; this would generate a pseudo-current in the transition zone. The presented numerical study offers a qualitative view for the pseudopotential function providing a smallest value for intercomponent interaction coefficient. This means the low pseudo-currents and the smallest size for the diffusive transition. The example simulation is presented for a problem of rotation of two components in a cylinder. The simulation gives also the Reynolds number range and the cylinder aspect ratio that ensure the start of flow recirculation at the cylinder axis. It was demonstrated that simulation results comply with experimental data with a high accuracy.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"601 - 614"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139083906","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
Volumetric properties of liquid and solid LiF–KF mixtures 液态和固态 LiF-KF 混合物的体积特性
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040133
R. A. Khairulin, R. N. Abdullaev, S. V. Stankus, A. B. Meshalkin
{"title":"Volumetric properties of liquid and solid LiF–KF mixtures","authors":"R. A. Khairulin,&nbsp;R. N. Abdullaev,&nbsp;S. V. Stankus,&nbsp;A. B. Meshalkin","doi":"10.1134/S0869864323040133","DOIUrl":"10.1134/S0869864323040133","url":null,"abstract":"<div><p>The density of liquid mixtures of lithium and potassium fluorides with a content of 51.2 and 71.1 mol % LiF was measured using gamma-ray attenuation technique in the temperature range from liquidus to 1000–1190 K. For a mixture of near-eutectic composition (51.2 mol % LiF), the relative density change during the solid–liquid phase transition and the density in the solid state near the melting point were directly determined for the first time. The concentration dependences of the molar volume and volumetric coefficient of thermal expansion for the LiF–KF liquid system were plotted on the basis of the experimental and literature data. The obtained dependences were found to be close to the concentration dependences of the corresponding volumetric properties for ideal solutions.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"747 - 755"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084021","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
Opportunities for using the thermal imaging method of nondestructive inspection for skin delamination diagnosis in honeycomb structures used in modern aircraft 利用热成像无损检测方法诊断现代飞机蜂窝结构表皮脱层的机会
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040066
N. I. Klochkov, I. D. Zverkov, D. A. Gavrilov
{"title":"Opportunities for using the thermal imaging method of nondestructive inspection for skin delamination diagnosis in honeycomb structures used in modern aircraft","authors":"N. I. Klochkov,&nbsp;I. D. Zverkov,&nbsp;D. A. Gavrilov","doi":"10.1134/S0869864323040066","DOIUrl":"10.1134/S0869864323040066","url":null,"abstract":"<div><p>The modern aviation industry has many applications for honeycomb composite panels (HCP). The HCP-manufactured product line becomes more extended. This dictates a need for most effective and inexpensive methods for nondestructive inspection for HCP integrity that can ensure a high level of flight safety. One of promising methods for nondestructive inspection is the thermal technique. This paper presents and analyses the method feasibility of revealing the delamination of outer skin from an HCP filling. This task is performed by numerical simulation and the paper presents a pictorial test with a sample of HCP typical of aircraft engineering. Our results demonstrate how the thermal imaging tools can be used for the fact of skin delamination with regard for technical restrictions found in real experiments with a physical sample of HCP.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"661 - 671"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084023","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
Plasma-chemical waste processing: numerical analysis and experiment. Part 4. Ash-and-slag waste and oil refinery wastes 等离子体化学废物处理：数值分析和实验。第 4 部分。灰渣废料和炼油废料
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040169
V. E. Messerle, O. A. Lavrichshev, A. B. Ustimenko
{"title":"Plasma-chemical waste processing: numerical analysis and experiment. Part 4. Ash-and-slag waste and oil refinery wastes","authors":"V. E. Messerle,&nbsp;O. A. Lavrichshev,&nbsp;A. B. Ustimenko","doi":"10.1134/S0869864323040169","DOIUrl":"10.1134/S0869864323040169","url":null,"abstract":"<div><p>The results of thermodynamic calculations and experimental studies on plasma processing of ash-and-slag wastes and oil refinery wastes with production of fuel gas and inert mineral material are presented. The calculated and experimental data on plasma-chemical processing of oil refinery wastes are compared.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"779 - 784"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139083972","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 gas inflow into a vacuum vessel 真空容器气体流入量的计算
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040121
V. I. Zvegintsev, S. V. Lukashevich
{"title":"Calculation of gas inflow into a vacuum vessel","authors":"V. I. Zvegintsev,&nbsp;S. V. Lukashevich","doi":"10.1134/S0869864323040121","DOIUrl":"10.1134/S0869864323040121","url":null,"abstract":"<div><p>Based on the hypothesis of quasi-stationarity, relations were obtained for calculating the unsteady process of filling a vacuum vessel with a gas. As a criterion for the completion of the filling process, the admissible degree of pressure increase in the vacuum vessel was adopted. An analysis was made of the possibilities of increasing the duration of the filling process for a vacuum vessel of a given volume.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"733 - 745"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084117","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 influence of calcium addition on thermophysical properties and thermodynamic functions of aluminum alloy AlCu4.5Mg1 钙添加对铝合金 AlCu4.5Mg1 热物理性能和热力学函数的影响
IF 0.5 4区 工程技术
Thermophysics and Aeromechanics Pub Date : 2024-01-03 DOI: 10.1134/S0869864323040145
I. N. Ganiev, R. S. Shonazarov, A. Elmurod, U. N. Faizulloev, A. G. Safarov
{"title":"The influence of calcium addition on thermophysical properties and thermodynamic functions of aluminum alloy AlCu4.5Mg1","authors":"I. N. Ganiev,&nbsp;R. S. Shonazarov,&nbsp;A. Elmurod,&nbsp;U. N. Faizulloev,&nbsp;A. G. Safarov","doi":"10.1134/S0869864323040145","DOIUrl":"10.1134/S0869864323040145","url":null,"abstract":"<div><p>The cooling rates of the studied alloy samples were determined in the “cooling” mode by constructing thermograms of cooling alloys and their subsequent differentiation. Considering the heat capacity of the standard (Al brand A5N) and the cooling rates of the samples and the standard, the temperature dependence of the heat capacity of the aluminum alloy AlCu4.5Mg1 doped with calcium was calculated. Computer processing of the results served to obtain a polynomial of the temperature dependence of the heat capacity of alloys in the form of a four-term equation with the correlation coefficient R ≤ 0.999. It has been found that the heat capacity, enthalpy, and entropy of the alloys increase with increasing temperature, while the value of the Gibbs energy decreases. Additions of calcium in the range of 0.05–1.0 wt. % reduce the heat capacity, heat transfer coefficient, enthalpy, and entropy of the AlCu4.5Mg1 aluminum alloy, and the Gibbs energy has an inverse relationship.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"30 4","pages":"757 - 765"},"PeriodicalIF":0.5,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139084076","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信