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Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 233-241 doi: 10.1007/s11465-010-0014-0

Abstract: Based on the theory of heat transfer, the transfer function between the thermal deformation of any pointBy solving the amplitude-frequency characteristics and phase-frequency characteristics of the transferfunction, the steady-state response of thermal deformation of the ballscrew is obtained, and the thermaldynamics characteristics of the lead screw under the influence of multi-heat sources are further studiedThrough tests of the steady-state response of thermal deformation, the thermal dynamics characteristics

Keywords： ballscrew     Laplace transform     transfer function     thermal dynamic characteristics    

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Numerical study of thermal characteristics of double skin facade system with middle shade

Shaoning LIU, Xiangfei KONG, Hua YANG, Minchao FAN, Xin ZHAN

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 222-234 doi: 10.1007/s11708-017-0480-8

Abstract: 3D dynamic simulation was conducted to analyze the influence of MS combined with DSF on the indoor thermalcharacteristics.the shade in the three seasons are different, and different conditions effectively enhance the indoor thermalcharacteristics.According to the climate characteristics of winter and transition season, in winter, early spring, and

Keywords： middle shade     position     thermal characteristics     double skin facade    

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Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 134-141 doi: 10.1007/s11708-015-0354-x

Abstract: The operating characteristics were studied for the variation of heat input, filling ratio (FR) and inclinationImportant insight into the operational characteristics of PHP has been obtained.

Keywords： closed loop pulsating heat pipe     thermal performance     operation limit     thermography    

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Thermal and hydraulic characteristics of a large-scaled parabolic trough solar field (PTSF) under cloud

Linrui MA, Zhifeng WANG, Ershu XU, Li XU

Frontiers in Energy 2020, Volume 14, Issue 2,   Pages 283-297 doi: 10.1007/s11708-019-0649-4

Abstract: To better understand the characteristics of a large-scaled parabolic trough solar field (PTSF) undercloud passages, a novel method which combines a closed-loop thermal hydraulic model (CLTHM) and cloudsimulation, all essential parameters, such as the total flowrate, flow distribution, outlet temperature, thermalIn addition, the mechanism of thermal and hydraulic unbalance caused by cloud passages are explained

Keywords： parabolic trough solar field (PTSF)     thermal hydraulic model     cloud passages     transients    

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Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 408-415 doi: 10.1007/s11465-008-0061-y

Abstract: Empirical model of machine tools on thermal error has been widely researched, which can compensate forthermal error to some extent but not suitable for thermal dynamic errors produced by dynamic heat sourcesnetwork (ANN) system identification) are put forward to establish a dynamic characteristic model of thermalThe model of thermal error of the axis in a feed system of DM4600 vertical miller is established with

Keywords： square system     network     vertical miller     transfer     ANN    

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Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0672-8

Abstract: Surface roughness and thermal action are of remarkable importance in the lubrication performance of mechanicaltemperature rise and real 3D surface roughness due to the complexity of surface topography and temperature characteristicsIn this paper, a deterministic mixed thermal elastohydrodynamic lubrication model considering real 3Dsurface roughness and thermal effects is proposed.The influences of surface roughness and thermal effect on lubrication performance are revealed.

Keywords： thermal elastohydrodynamic lubrication     surface roughness effect     thermal effect     temperature characteristics    

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CFD Simulation of thermal hydraulic characteristics in a typical upper plenum of RPV

Mingjun WANG, Lianfa WANG, Yingjie WANG, Wenxi TIAN, Jian DENG, Guanghui SU, Suizheng QIU

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 930-945 doi: 10.1007/s11708-021-0728-1

Abstract: A comparative computational fluid dynamics (CFD) study was conducted on the three different types of pressurized water reactor (PWR) upper plenum, named TYPE 1 (support columns (SCs) and control rod guide tubes (CRGTs) with two large windows), TYPE 2 (SCs and CRGTs without windows), and TYPE 3 (two parallel perforated barrel shells and CRGTs). First, three types of upper plenum geometry information were collected, simplified, and adopted into the BORA facility, which is a 1/5 scale system of the four-loop PWR reactor. Then, the geometry, including the upper half core, upper plenum region, and hot legs, was built using the platform. After that, an unsteady calculation to simulate the reactor balance operation at hot full power scenario was performed. Finally, the differences of flowrate distribution at the core outlet and temperature distribution and transverse velocity inside the hot legs with different upper plenum internals were compared. The results suggest that TYPE 1 upper plenum internals cause the largest flowrate difference at the core outlet while TYPE 3 leads to the most even distributed flowrate. The distribution and evolution pattern of the tangential velocity inside hot legs is highly dependent on the upper plenum internals. Two counter-rotating swirls exist inside the TYPE 1 hot leg and only one swirl revolving around the hog leg axis exist inside the TYPE 2 hot leg. For TYPE 3, two swirls like that of TYPE 1 rotating around the hot leg axis significantly increase the temperature homogenization speed. This research provides meaningful guidelines for the future optimization and design of advanced PWR upper plenum internal structures.

Keywords： pressurized water reactor (PWR)     upper plenum     internal structures     temperature distribution     computational fluid dynamics (CFD)    

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Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 28-36 doi: 10.1007/s11465-008-0007-4

Abstract: This research focuses on the characteristics of how a ball-screw changes its temperature correspondingBy simulating and modeling the temperature field and thermal deformation of the ball-screw under periodicallyvarying heat sources, this paper describes the thermal dynamic characteristics of the ball-screw underBy testing the thermal dynamic characteristics of the ball-screw, the numerical solution is validated

Keywords： numerical solution     temperature corresponding     temperature distribution     end-most     ball-screw    

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Prediction of performance, combustion and emission characteristics of diesel-thermal cracked cashew nut

Arunachalam VELMURUGAN,Marimuthu LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 114-124 doi: 10.1007/s11708-016-0394-x

Abstract: performance, combustion and emissions of a single cylinder, four stroke stationary, diesel engine operated by thermalThe ANN was used to predict eight different engine-output responses, namely brake thermal efficiencythe experimental values for various engine performances, combustion parameters and exhaust emission characteristics

Keywords： cashew nut shell liquid (CNSL)     artificial neural networks (ANN)     thermal cracking     mean square error (MSE    

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Analysis of flow and heat transfer characteristics of porous heat-storage wall in greenhouse

OUYANG Li, LIU Wei

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 406-409 doi: 10.1007/s11708-008-0094-2

Abstract: The flow and heat transfer characteristics of porous heat-storage wall in greenhouse are studied by usingwall depends upon the inlet air velocity, the porosity and the permeability of porous medium, and the thermal

Keywords： incidence     thermal conductivity     heat-storage     exchange     composite    

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Thermal Characteristics of the Main Spindle With Cooling System on the XK717 CNC Milling Machine

Wang Jinsheng,Hu Rufu,Wu Xiuhai

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 84-88

Abstract: The quality of thermal behavior influences the machining accuracy of machine tools directly.In this paper, thermal characteristics of spindle system on the XK717 CNC milling machine are analyzedEffect rule to thermal characteristics of the main spindle system are obtained.

Keywords： thermal characteristics     finite element     optimization design     CNC milling machine    

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Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 486-494 doi: 10.1007/s11708-015-0368-4

Abstract: The brake thermal efficiency (BTE) was increased and brake specific fuel consumption (BSFC) decreased

Keywords： hydrogen     brake thermal efficiency     crank angle     compressed ignition (CI)    

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Analysis of the core thermal-hydraulic characteristics of in-hospital neutron irradiatormark 1 reactor

Chen Lixin,Zhao Zhumin,Jiang Xinbiao,Zhu Lei,Zhou Yongmao

Strategic Study of CAE 2012, Volume 14, Issue 8,   Pages 51-55

Abstract:

According to the characteristics and operation condition of IHNI-1 reactorIt also has been verified that the model is reasonable and effective in IHNI-1's thermal hydraulicUsing the model, some thermal parameters of IHNI-1reactor are calculated.

Keywords： IHNI-1 reactor     thermal-hydraulic     subchannel     safety analysis    

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Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustionand their effects on engine thermal efficiency and emissions

LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 420-427 doi: 10.1007/s11708-007-0061-7

Abstract: Cycle fuel energy distribution and combustion characteristics of early in-cylinder diesel homogenous

Keywords： combustion     compression     homogenous     in-cylinder     modulated multi-pulse    

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Thermal degradation characteristics and products obtained after pyrolysis of specific polymers found

Evangelia C. Vouvoudi, Aristea T. Rousi, Dimitris S. Achilias

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0996-5

Abstract: The aim of this study was to investigate the thermal degradation and the products obtained after pyrolysis

Keywords： Pyrolysis     WEEE recycling     ABS     HIPS     PC     Py-GC/MS     TGA    

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Title Author Date Type Operation

Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Journal Article

Numerical study of thermal characteristics of double skin facade system with middle shade

Shaoning LIU, Xiangfei KONG, Hua YANG, Minchao FAN, Xin ZHAN

Journal Article

Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Journal Article

Thermal and hydraulic characteristics of a large-scaled parabolic trough solar field (PTSF) under cloud

Linrui MA, Zhifeng WANG, Ershu XU, Li XU

Journal Article

Theory analysis and system identification methods on thermal dynamics characteristics of ballscrews

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Journal Article

Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Journal Article

CFD Simulation of thermal hydraulic characteristics in a typical upper plenum of RPV

Mingjun WANG, Lianfa WANG, Yingjie WANG, Wenxi TIAN, Jian DENG, Guanghui SU, Suizheng QIU

Journal Article

Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws

XIA Junyong, HU Youmin, WU Bo, SHI Tielin

Journal Article

Prediction of performance, combustion and emission characteristics of diesel-thermal cracked cashew nut

Arunachalam VELMURUGAN,Marimuthu LOGANATHAN,E. James GUNASEKARAN

Journal Article

Analysis of flow and heat transfer characteristics of porous heat-storage wall in greenhouse

OUYANG Li, LIU Wei

Journal Article

Thermal Characteristics of the Main Spindle With Cooling System on the XK717 CNC Milling Machine

Wang Jinsheng,Hu Rufu,Wu Xiuhai

Journal Article

Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen

R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN

Journal Article

Analysis of the core thermal-hydraulic characteristics of in-hospital neutron irradiatormark 1 reactor

Chen Lixin,Zhao Zhumin,Jiang Xinbiao,Zhu Lei,Zhou Yongmao

Journal Article

Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustionand their effects on engine thermal efficiency and emissions

LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong

Journal Article

Thermal degradation characteristics and products obtained after pyrolysis of specific polymers found

Evangelia C. Vouvoudi, Aristea T. Rousi, Dimitris S. Achilias

Journal Article