Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer最新文献_第3页

Flow Simulation of Gas Cyclone Separator at High Reynolds Number Using theElliptic-Relaxation Hybrid LES/RANS (ER-HRL) Model 基于椭圆-弛豫混合LES/RANS (ER-HRL)模型的高雷诺数气体旋风分离器流动模拟

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/icmfht21.lx.110

M. Sayed, A. Dehbi, B. Niceno, K. Mikityuk, Marie L. Krinner

引用次数: 4

An Ultrafine Particle Number Measurement System Operating Under Wide Temperature Rang 宽温度范围下的超细颗粒数测量系统

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/enfht21.lx.003

Longfei Chen

{"title":"An Ultrafine Particle Number Measurement System Operating Under Wide Temperature Rang","authors":"Longfei Chen","doi":"10.11159/enfht21.lx.003","DOIUrl":"https://doi.org/10.11159/enfht21.lx.003","url":null,"abstract":"Developing a new non-volatile condensation particle counter (nv-CPC) which can operate at high temperature of up to 300°C, at which volatile organic compounds (VOCs) and water are in gaseous phase. Hence, the nv-CPC counts the number concentration of only non-volatile particles which are less susceptible to dilution conditions. Contrarily, the conventional condensation particle counter (CPC) operating at room temperature counts not only non-volatile particles but also organic particles formed via the condensation of VOCs or semi-VOCs. VOCs may experience coagulation, condensation and adsorption in the dilution plume and thus are highly sensitive to dilution conditions. Therefore, the conventional CPC inevitably suffers higher uncertainties than the nv-CPC due to VOCs presence. To achieve a reproducible measurement of particle number, the EU initiated the Particle Measurement Program (PMP) which specified a volatile particle remover (VPR) be used prior to particle counter to mitigate the VOCs artifacts. The controversial cut-off size and incomplete VOCs removal issues trigger the need to re-consider the methodology. The nv-CPC was calibrated based on the PMP protocol and was compared with the conventional CPC by challenging different mono-disperse particles screened via an electrical classifier. The nv-CPC size spectra were largely stable regardless of pre-process and dilution conditions for raw sample gas, whilst the CPC size spectra exhibited higher uncertainties. The parallel arrangement of the CPC and the nv-CPC also facilitates the online determination of size-resolved EC/TC (elemental carbons/total carbons) ratios on particle number basis, which could be more useful than the bulk EC/TC ratios measured by off-line filter-based technique. The distinction of PM emissions from different sources including a Santoro burner and a modern aero-engine was well characterized by using both particle counters in tandem.","PeriodicalId":261334,"journal":{"name":"Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123817040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-Capillary Induced Motion in Multiphase System UsingSmoothed Particles Hydrodynamics 基于光滑颗粒流体力学的多相系统热毛细诱导运动

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/icmfht21.lx.304

F. Almasi, M. Shadloo, A. Hadjadj

引用次数: 0

Experimental Study on Electrified Micro-Jet Instability inElectrohydrodynamic Atomization(EHDA) Cone-Jet 电流体雾化(EHDA)锥形射流中带电微射流不稳定性的实验研究

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/icmfht21.lx.103

Shiqi Yang, Zhentao Wang

引用次数: 0

Pressure Coupling Of the Spherical Linear Eddy Model to RANS-CFDfor Internal-Combustion Engine Simulation. 用于内燃机仿真的球面线性涡模型与ranss - cfd的压力耦合。

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/csp21.lx.103

Nidal Doubiani, A. Menon, A. Kerstein, M. Oevermann

引用次数: 2

Modelingof Viscous Fingering based on the numerical solution of the Navier-Stokes Equations in 3D. 基于三维Navier-Stokes方程数值解的粘性指法建模。

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/icmfht21.lx.201

A. Pinilla, Luis Ramirez, M. Asuaje, N. Ratkovich

引用次数: 0

Refrigerant Mass Distribution in an R600a Household Refrigerator-Freezer during Cyclic Operation R600a家用冷冻机循环运行时制冷剂质量分布

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/enfht21.lx.101

Wonhee Cho, Dongchan Lee, D. Jang, Yongchan Kim

引用次数: 0

Experimental Study on Evaporation Heat Transfer Characteristicsof R32 in A Plate Heat Exchanger R32在板式换热器中蒸发换热特性的实验研究

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/icmfht21.lx.106

Jae-Kyeong Yang, Dongchan Lee, Yongchan Kim

{"title":"Experimental Study on Evaporation Heat Transfer Characteristicsof R32 in A Plate Heat Exchanger","authors":"Jae-Kyeong Yang, Dongchan Lee, Yongchan Kim","doi":"10.11159/icmfht21.lx.106","DOIUrl":"https://doi.org/10.11159/icmfht21.lx.106","url":null,"abstract":"This study experimentally investigates the evaporation heat transfer and frictional pressure drop characteristics of R32 in a plate heat exchanger with a chevron angle of 60°. The evaporation heat transfer coefficient and friction factor are measured at mass fluxes of 50, 70, and 90 kg/ms, a heat flux of 6.45 kW/m, and saturation temperatures of 5 and 15 °C. The heat transfer coefficient increases with the mass flux, saturation temperature, and vapor quality because the forced convective boiling is dominant in this study. The frictional pressure drop also increases gradually with the vapor quality owing to the high velocity difference between the two phases. R32 exhibits a higher heat transfer coefficient and frictional pressure drop than R410A due to the high thermal conductivity and low vapor density. Furthermore, the friction factor of R32 decreases up to a certain quality (0.4) and then increases slightly afterwards. The frictional pressure drop of R32 is greater than R410A owing to the influence of density despite the lower viscosity. The friction factor of R32 is also higher than R410A due to the lower liquid and vapor density.","PeriodicalId":261334,"journal":{"name":"Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125542503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Conductivity and Viscosity of Ionanocolloids for Applicationsin Thermal Energy Systems 在热能系统中应用的离子胶体的导热性和粘度

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/enfht21.lx.303

E. Fabre, S. Murshed

引用次数: 0

Impact of Various Fuels with Different Molecular Structures on Combustion Process and Soot Formation 不同分子结构燃料对燃烧过程和烟灰形成的影响

Proceedings of the 6th World Congress on Momentum, Heat and Mass Transfer Pub Date : 2021-06-01 DOI: 10.11159/csp21.lx.003

Yang Wenming

引用次数: 0