Journal of Engineering Thermophysics最新文献

Single-Phase Cooling of Large Surface by Water Droplet Flow 利用水滴流对大面积表面进行单相冷却

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030093

A. D. Nazarov, N. B. Miskiv, A. F. Serov, V. N. Mamonov

引用次数: 0

Features of Plasma-Thermal Melting of Ash and Slag from Incineration Plant1 焚烧厂灰渣和炉渣的等离子体热熔特性1

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030159

A. S. Anshakov, O. G. Volokitin, P. V. Domarov

引用次数: 0

Features of Oxidation of Bismuth by High-Density Water-Oxygen Fluid 高密度水氧流体氧化铋的特征

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030020

O. N. Fedyaeva, A. P. Grebennikov, A. A. Vostrikov

引用次数: 0

Numerical Implementation of Boundary Conditions on Bubbles in a Microchannel with Stationary Laminar Flow 静止层流微通道中气泡边界条件的数值实现

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030044

D. S. Gluzdov, E. Ya. Gatapova

引用次数: 0

Establishment and Application of the Energy Consumption Model for a Novel Dual-Suction Compressor 新型双吸入式压缩机能耗模型的建立与应用

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030123

Z. Li, W. Ao, L. Zhang, C. Liu, Y. Li, P. Dong, J. Tong

{"title":"Establishment and Application of the Energy Consumption Model for a Novel Dual-Suction Compressor","authors":"Z. Li, W. Ao, L. Zhang, C. Liu, Y. Li, P. Dong, J. Tong","doi":"10.1134/s1810232824030123","DOIUrl":"https://doi.org/10.1134/s1810232824030123","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, a mathematical model of the dual suction compressor which can be applied to the household temperature and humidity independent control air conditioning system was established. The parameters of R410A were calculated with the help of REFPROP. The power consumptions of the dual suction compressor at different frequencies were calculated at different evaporation and condensing temperatures. Comparing with the experimental data, relative errors within <span>(pm10)</span>% between the simulated and experimental values of compressor power consumption occurred under various conditions, suggesting that the accuracy of the established energy consumption model met the requirements of engineering application. With the established model, the influence of different evaporation and condensing temperatures on the compressor power consumption and energy efficiency were simulated. The results showed that when keeping the evaporation temperature and condensing temperature of the LT side as a constant, the compressor power consumption decreased by 3.2% with each 1°C increment of the average evaporation temperature of the HT side. On the other hand, when the HT side evaporation temperature and condensing temperature was maintained as a constant, increased by 10% and the compressor power consumption decreased by 1.7% with each 1°C increment of the average LT side evaporation temperature. The verified model can be applied to guide the optimization of evaporation and condensing temperatures in the future practical application of dual suction compressor in temperature and humidity independent control air conditioning system.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250326","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

Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition 辐射流体流经垂直时变移动板时的非稳态 MHD 自由对流与斜坡双扩散条件

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030135

H. K. Mandal, D. K. Maiti, R. N. Jana

{"title":"Unsteady MHD Free Convection in a Radiating Fluid Flow past a Vertically Time-Dependent Moving Plate with Ramped Double-Diffusive Condition","authors":"H. K. Mandal, D. K. Maiti, R. N. Jana","doi":"10.1134/s1810232824030135","DOIUrl":"https://doi.org/10.1134/s1810232824030135","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An unsteady MHD-free convection heat-mass transfer from a viscous, incompressible fluid flow past an infinite vertical moving plate is studied here. The fluid is considered to be electrically conducting and chemically reacting. We consider three types of plate movements: uniform velocity, uniform acceleration, and periodic acceleration. Ramped as well as constant conditions at the plate for both temperature and concentration are considered. We obtain the exact solutions of the governing equations using the method of the Laplace transform technique. The impact of the type of thermal and concentration boundary condition (constant/ramped) at the plate as well as the kind of plate movement on the flow, heat and mass transfer characteristics, are presented and analyzed here. While doing so, we also consider the variation of our governing parameters: thermal and solutal Grashof numbers, magnetic field intensity, radiation (<span>(R)</span>), chemical reaction (<span>(Kc)</span>), Prandtl number and Schmidt numbers. It is observed that the presence of buoyancy and other forces close to the plate can be almost nullified due to the imposition of a strong transverse magnetic field. The viscous drag at the plate diminishes (and increases) with the increase of the strength of the applied magnetic field (and <span>(R)</span> and <span>(Kc)</span>). The rate of increment of skin friction with respect to time is more for the case of periodic oscillating plate movement. The magnitude of viscous drag is reported as more significant for the constant case compared to the ramped case.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250327","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 Study of Characteristics of Activated Carbon Produced from Pine Nut Shells by Pyrolysis Technology Followed by Steam-Gas Activation 用热解技术生产松果壳活性炭并进行蒸汽-气体活化的特性实验研究

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s181023282403007x

A. V. Kuznetsov, E. Yu. Shadrin

引用次数: 0

LDA-Based Experimental Investigation of Velocity Pulsations in the Vortex Tube 基于 LDA 的涡管速度脉动实验研究

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030032

I. K. Kabardin, N. I. Yavorsky, M. Kh. Pravdina, M. R. Gordienko, S. V. Kakaulin, K. S. Zubanov, G. V. Bakakin, V. G. Meledin

引用次数: 0

Phase Equilibrium for Hydrofluorocarbon R134a Hydrate. Hydrate-Based Desalination of NaCl Salt Solution 氢氟碳化合物 R134a 水合物的相平衡。基于水合物的氯化钠盐溶液脱盐

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030172

A. V. Meleshkin, A. K. Sagidullin, S. Y. Misyura, V. S. Morozov, N. V. Marasanov, V. V. Glezer, M. Sh. Madygulov, M. T. Mito

引用次数: 0

Investigation of the Local Equilibrium Approximation in a Planar Momentumless Turbulent Wake in a Passively Stratified Fluid 被动分层流体中平面无动量湍流漩涡的局部平衡近似研究

IF 2.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2024-09-18 DOI: 10.1134/s1810232824030056

V. N. Grebenev, A. G. Demenkov, G. G. Chernykh

{"title":"Investigation of the Local Equilibrium Approximation in a Planar Momentumless Turbulent Wake in a Passively Stratified Fluid","authors":"V. N. Grebenev, A. G. Demenkov, G. G. Chernykh","doi":"10.1134/s1810232824030056","DOIUrl":"https://doi.org/10.1134/s1810232824030056","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The flow in the far planar momentumless turbulent wake in a passively stratified medium is investigated with the use of a mathematical model that includes, along with the averaged equation for transfer of the longitudinal component of velocity, the differential equations for balance of the turbulence energy <span>(e)</span>, transfer of its dissipation rate <span>(varepsilon)</span>, fluid density defect <span>(langlerho_{1}rangle)</span>, shear turbulent stress <span>(langle{u}'{v}'rangle)</span>, and vertical component of the mass flux vector <span>(langle v'rho'rangle)</span> in the far wake approximation. Algebraic truncation of the last two equations leads to the known gradient relations for the shear turbulent stress and the vertical component of the mass flux vector. It has been established that with a certain limitation on the values of the empirical constants of the mathematical model and with a time scale growth law consistent with the mathematical model, these relations are joint differential constraints of the model. It has been found that the local equilibrium approximation for the shear turbulent stress is equivalent to the equality to zero of the Poisson bracket for dimensionless values of the turbulent viscosity coefficient and the defect of the longitudinal velocity component. It has been obtained that the local equilibrium approximation for the vertical component of the mass flux vector is equivalent to the equality to zero of the Poisson bracket for dimensionless values of the turbulent diffusion coefficient and mean density. Results of numerical experiments illustrating the theoretical results are presented.</p>","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250319","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