Fluid Dynamics最新文献_第4页

A Thorough Comparative Analysis of Two Design Methods for DEP Heavy-Loaded Propellers DEP重型螺旋桨两种设计方法的深入对比分析

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-03-01 DOI: 10.1134/S001546282560169X

S. J. Shi, J. B. Huo, A. C. Zou

{"title":"A Thorough Comparative Analysis of Two Design Methods for DEP Heavy-Loaded Propellers","authors":"S. J. Shi, J. B. Huo, A. C. Zou","doi":"10.1134/S001546282560169X","DOIUrl":"10.1134/S001546282560169X","url":null,"abstract":"To meet the increasingly stringent carbon emission requirements, the development of distributed electric propulsion aircraft has received growing attention. As the primary power component of electric aircraft, propeller performance profoundly influences the aircraft flight characteristics. This study aims to provide a reference for proposing new high aerodynamic efficiency design method for distributed electric propulsion heavy-loaded propeller by comparing the Aprop method with the widely used Adkins design approach, which are both suitable for heavy-loaded propeller. A thorough comparative analysis was conducted, focusing on the blade geometries, the thrust accuracy, the circulation distribution, the thrust distribution, and the induced velocity distribution. The results show that, under the same design conditions, the blades designed using the Aprop method have larger pitch angles and smaller chord lengths, except of a small region near the blade root. The Aprop method provides superior accuracy in the thrust, with actual thrust closely matching the required thrust. Although the Adkins method is applicable to the high propeller disc loading, it tends to underestimate the axial induced velocity, resulting in smaller pitch angles and discrepancies between actual and required thrust.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"61 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336052","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 and Experimental Study of Paraffin Melting in Heated Air Flow 热气流中石蜡熔化的数值与实验研究

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S001546282560364X

N. S. Sivakov, V. A. Usanov

引用次数: 0

Numerical Experiments in a Shock Tunnel with Intermediate and Detonation Chambers 带有中间室和爆震室的激波隧道数值试验

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825603675

P. V. Kozlov, V. Yu. Levashov, Yu. V. Tunik

引用次数: 0

Influence of the Length of an Inclined Groove on the Turbulent Heat Transfer Enhancement on a Plate with a Surface Vortex Generator during Air Flow 斜槽长度对带表面涡发生器板湍流换热强化的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825604206

S. A. Isaev, D. V. Nikushchenko, S. Z. Sapozhnikov, V. Yu. Mityakov, V. V. Seroshtanov, V. B. Kharchenko, Dehai Kong

{"title":"Influence of the Length of an Inclined Groove on the Turbulent Heat Transfer Enhancement on a Plate with a Surface Vortex Generator during Air Flow","authors":"S. A. Isaev, D. V. Nikushchenko, S. Z. Sapozhnikov, V. Yu. Mityakov, V. V. Seroshtanov, V. B. Kharchenko, Dehai Kong","doi":"10.1134/S0015462825604206","DOIUrl":"10.1134/S0015462825604206","url":null,"abstract":"Enhancement of heat transfer during separated flow around a groove having hemispherical ends, inclined at an angle of 45° to the direction of the air flow, and placed on the isothermal section of a heated plate is studied experimentally and numerically. The influence of the trench insert length on heat transfer and flow is studied. A one-and-a-half-fold increase in the relative heat transfer coefficient at the bottom of a “long” oval-trench dimple (OTD) has been revealed as compared to a smooth plate. It has been established that inclined oval dimples with a trench insert length taken relative to its width L = 0.05–1 and inclined OTDs with L greater than 2 differ radically in the structure of the vortex flow. In an inclined OTD with L = 5, a one-and-a-half-fold increase in the maximum return flow velocity and a threefold increase in the maximum swirling flow velocity as compared to similar parameters in a spherical dimple are observed. The relative heat transfer coefficient on the surface of the inclined groove is maximum at L = 2.5 and considerably exceeds the average relative coefficient of heat transfer from the heated section of the plate with the OTD. It is shown that acceleration of the near-wall flow over the inlet part of the inclined OTD under conditions of anomalous heat transfer enhancement is associated with an increase in the longitudinal component of the velocity at the cut of the “long” OTD to almost 60% of the velocity of the oncoming flow, as well as with thinning of the thermal boundary layer.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 8","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339596","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

DME Effect on Soot Formation in Acetylene/Air Flames 二甲醚对乙炔/空气火焰中烟灰形成的影响

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825603614

A. V. Drakon, A. V. Eremin, E. S. Khodyko, R. N. Kolotushkin, A. A. Timoshenko

引用次数: 0

Heat Transfer and Fluid Dynamics Modeling in Shear-Driven Liquid Film Cooling System of Microelectronic Equipment 微电子设备剪切驱动液膜冷却系统的传热与流体动力学建模

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825604279

O. A. Kabov, V. V. Kuznetsov

{"title":"Heat Transfer and Fluid Dynamics Modeling in Shear-Driven Liquid Film Cooling System of Microelectronic Equipment","authors":"O. A. Kabov, V. V. Kuznetsov","doi":"10.1134/S0015462825604279","DOIUrl":"10.1134/S0015462825604279","url":null,"abstract":"Analytical and numerical solutions were obtained for the problem of combined liquid film and gas flow in a flat channel with a local rectangular heat source located at the channel bottom. A linear approximation of the problem was derived, and an exact solution was obtained, which can be used to test numerical algorithms and codes. The solution is valid for small film surface deformations and small deformation curvatures. Numerical calculations were performed in the thin-layer approximation for the flow of FC-72 liquid and gaseous nitrogen. The model proposed takes into account convective heat transfer, the effect of liquid surface tension and the Marangoni effect, as well as the dependence of liquid viscosity on temperature. The influence of gas pressure and shear surface stress induced by the gas flow on the deformation intensity at the liquid-gas interface as well as the effect of heating on pressure variations in the gas flow and generated shear stress were studied. It has been established that, in contrast to the case of an infinite flow or a large channel height, for a direct gas and liquid flow in a microchannel, the influence of liquid film deformations on the pressure and velocity in the gas phase is significant.","PeriodicalId":560,"journal":{"name":"Fluid Dynamics","volume":"60 8","pages":""},"PeriodicalIF":0.6,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339851","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 Spectral Radiation of Shock Waves in Air with the Use of the eRC Model 用eRC模型计算空气中激波的光谱辐射

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825604164

S. T. Surzhikov

引用次数: 0

Peculiarities of Soot Formation during Shock-Wave Pyrolysis of Ethylene 乙烯冲击波热解过程中烟灰形成的特性

IF 0.6 4区工程技术

Fluid Dynamics Pub Date : 2026-02-17 DOI: 10.1134/S0015462825603687

A. V. Eremin, M. R. Korshunova, E. Yu. Mikheyeva, V. N. Zolotarenko

引用次数: 0

Description of a Method for Solving Simplified Thermodeformation Equations Using the Compact Polynomial Method Scheme 描述一种用紧多项式格式求解简化热变形方程的方法