FATIGUE STRENGTH ANALYSIS AND OPTIMIZATION OF FSC RACING EXHAUST SYSTEM by QI Qi, LIU HaoTian, WU XiaoJian, LUO Cheng

“…The exhaust pipe of engine is subjected to alternating load of low and high temperatures during operation,which is prone to fatigue damage.For the FSC（Formula Student China） racing engine with the highest speed of 11 000 r/min～13 OOOr/min,the exhaust pipe fatigue problem is more serious.In this paper,the FSC racing exhaust system is taken as the research object to analyze its fatigue strength and optimize the exhaust pipe thickness.Firstly,the Fluent software is used to analyze the conjugate heat transfer of the exhaust system to determine the temperature distribution of the exhaust system.Then the temperature distribution is mapped to the finite element mesh of the exhaust system,and the thermal stress and thermal strain are analyzed by finite element technology.Subsequently,two schemes including exhaust manifold " normal operation-parking cooling" cycle and extreme working condition cycle are designed to carry out the thermal cycle simulation.It is found that the exhaust gas accumulates plastic deformation under the alternating load of each cycle,and the exhaust system will eventually crack and be destroyed.Finally,the fatigue life of the two schemes is studied by using Ansys nCode DesignLife fatigue analysis software.The results show that both schemes effectively reflect the life expectancy of low-cycle fatigue damages under the combined action of exhaust manifold temperature field,thermal stress and strain.Based on the above analysis,the exhaust thickness is optimized by the extreme working condition circulation scheme.and it is verified by experiments that the 1.2 mm thickness steel pipe meets the FSC exhaust requirements.…”
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Analytical Investigation of Laminar Viscoelastic Fluid Flow over a Wedge in the Presence of Buoyancy Force Effects by B. Rostami, M. M. Rashidi, P. Rostami, E. Momoniat, N. Freidoonimehr

“…An analytical strong method, the homotopy analysis method (HAM), is employed to study the mixed convective heat transfer in an incompressible steady two-dimensional viscoelastic fluid flow over a wedge in the presence of buoyancy effects. …”
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Dynamic Simulation of Photothermal Environment in Solar Greenhouse Based on COMSOL Multiple Physical Fields by Huan Liu, Fankun Meng, Zhengnan Yan, Yuliang Shi, Subo Tian, Yanjie Yang, Xiaoye Li

“…This model coupled multiphysical fields with fluid flow and heat transfer processes. The boundary conditions and initial values of the external environment and soil were derived from meteorological data and an efficient interpolation function method, with the time step updated every 1h. …”
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Investigation of Two-Dimensional Viscoelastic Fluid with Nonuniform Heat Generation over Permeable Stretching Sheet with Slip Condition by Haroon Ur Rasheed, Zeeshan Khan, Saeed Islam, Ilyas Khan, Juan L. G. Guirao, Waris Khan

“…The novel effects for the parameters which affect the flow and heat transfer, such as the Eckert number, porous medium parameter, and the velocity slip parameter, are studied through graphs. …”
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Thermal Performance Analysis of Reinforced Concrete Floor Structure with Radiant Floor Heating System in Apartment Housing by Young-Sun Jeong, Hae-Kwon Jung

“…To set up reasonable thermal insulation requirements for radiant heating floor systems, the thermal properties of floor structure according to thermal insulation materials must be determined. Heat transfer simulations were performed to analyze the surface temperature, heat loss, and heat flow of floor structure with radiant heating system. …”
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Numerical and analytical investigation of Jeffrey nanofluid convective flow in magnetic field by FEM and AGM by Mohammad ِDehghan Afifi, Ali Jahangiri, Mohammad Ameri

“…Investigation of mass and heat transfer phenomena has been done using mathematical modeling and considering thermal radiation. …”
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Development and Application of a Percolation Velocity Monitoring Method in Multiphase Percolation Physical Experiments by Cuo Guan, Xianjie Li, Ke Hu, Chen Liu, Hong Du, Ruokun Xian

“…This paper addresses this complexity by analyzing the heat transfer in porous media models under multiphase seepage conditions. …”
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CFD Turbulence Study of PWR Spacer-Grids in a Rod Bundle by C. Peña-Monferrer, J. L. Muñoz-Cobo, S. Chiva

“…Nuclear fuel bundles include spacers essentially for mechanical stability and to influence the flow dynamics and heat transfer phenomena along the fuel rods. This work presents the analysis of the turbulence effects of a split-type and swirl-type spacer-grid geometries on single phase in a PWR (pressurized water reactor) rod bundle. …”
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Curing simulation and data-driven curing curve prediction of thermoset composites by Chenchen Wu, Ruming Zhang, Pengyuan Zhao, Liang Li, Dingguo Zhang

“…Additionally, solving the heat transfer coupled with the cure kinetics presents additional requirements for time, making artificial intelligence tools promising for these problems. …”
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Improving the Performance of Liquid-Based Battery Thermal Management Systems Using Flow Patterns and Contact Surface with the Battery by Abolfazl Mokhtari

“…In this study, fluid dynamics and heat transfer in a cooling system for battery cells were investigated using three-dimensional solid-fluid simulations. …”
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A simulation study of thermal and hydraulic characteristics mini-channel circular heat sink: Effect of L-shaped multi-channel arrangement on flow maldistribution by Haider Ali Hussein

“…The simulation results indicated that the innovative L-shaped channel passages exhibited superior heat transfer capabilities when compared to traditional (rectangular) channels. …”
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Completely Recuperative Supercritical CO2 Recompression Brayton/Absorption Combined Power/Cooling Cycle: Performance Assessment and Optimization by Bing-Chuan Han, Yong-Dong Chen, Gai-Ge Yu, Xiao-Hong Wu, Tao-Tao Zhou

“…In addition, reducing heat transfer differences in relevant equipment can further promote system performance.…”
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Effects of Thermal Radiation and Variable Porosity on Unsteady Magnetoconvective Heat-Mass Transport Past a Vertical Perforated Sheet by Md. Abu Bkar PK, Md. Hasanuzzaman, Md. Mosharof Hossain, Dipayan Mondal

“…The local friction coefficient rises about by 32%, 12%, and 15% owing to improving values of Da from 0.5 to 2.0, R from 0.5 to 2.0, and Df from 0.5 to 3.5, respectively. The heat transfer falls down about by 33%, 35% due to enhancing values of R from 0.5 to 2.0, and Df from 0.5 to 3.5, respectively. …”
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Development of a vibration-damping, sound-insulating, and heat-insulating porous sphere foam system and its application in green buildings by Shi Hua, Moses Oyaro Okello, Jian Zhang

“…The thermal performance of the enclosure structure's floor and exterior wall heat transfer resistance is an important factor in reducing building carbon emissions in green buildings. …”
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Analytical Solutions for Thermo-Mechanical Coupling Bending of Cross-Laminated Timber Panels by Chen Li, Shengcai Li, Kong Yue, Peng Wu, Zhongping Xiao, Biqing Shu

“…The model initially utilizes Fourier series expansion based on heat transfer theory to address non-uniform temperature distributions. …”
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Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots by Zaoyang Li, Lijun Liu, Yunfeng Zhang, Qingchao Meng, Zhiyan Hu, Genshu Zhou

“…Therefore, the key to seed preservation is to control radiant heat transfer in the DS furnace and guarantee downward heat flux under the crucible.…”
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Insight into the Significance of Hall Current and Joule Heating on the Dynamics of Darcy–Forchheimer Peristaltic Flow of Rabinowitsch Fluid by Ji-Huan He, Doaa R. Mostapha

“…The Darcy–Forchheimer scheme is used for a porous medium; a mild stenosis is considered to study the impacts of radiative heat transfer and chemical reactions. Convective conditions are postulated for heat and mass transfer. …”
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A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion by Mingjun Zhong, Yankai Li, Meng Lin, Minghao Yuan, Yanhua Yang

“…When the molten fuel with high temperature falls into the cavity water, it will be dispersed into droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid or gas-liquid systems. …”
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Regulation of Temperature on Multitrays in an Indirect Solar Dryer (ISD) with Energy Storage and Three Airflow Modes by G. B. Tchaya, E. Tchoffo Houdji, J. H Tchami, C. Kapseu, M. Kamta

“…The model of outlet temperature with energy storage was given by using heat transfer equations. The results have shown that in the linking airflow mode, the average temperature on the three trays is 51.3 ± 1.5a°C, 52.18 ± 1.4a°C, and 51.9 ± 1.2a°C, respectively, with 52°C as setpoint temperature and NTC fixed on tray number 2. …”
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SIMULATION OF COOLING TOWER AND INFLUENCE OF AERODYNAMIC ELEMENTS ON ITS WORK UNDER CONDITIONS OF WIND by K. V. Dobrego, M. M. Hemmasian Kashani, E. E. Lasko

“…Analogy of heat and mass transfer was used that allowed to consider aerodynamic of one-dimension flow and carried out detailed 3D calculations applying modern PC. Heat transfer coefficient of irrigator and its hydrodynamic resistance were established according to experimental data on total air rate in cooling tower. …”
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