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< Page ,Total 23 >
Experimental and numerical investigation on flow characteristics of large cross-sectional ionic wind pump with multiple needles-to-mesh electrode EI Scopus SCIE
期刊论文 | 2019 , 141 (3) | Journal of Fluids Engineering, Transactions of the ASME
SCOPUS Cited Count: 1
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Abstract :

Ionic wind pumps have attracted considerable interest because of their low energy consumption, compact structures, flexible designs, and lack of moving parts. However, large cross-sectional ionic wind pumps have yet to be numerically analyzed and experimentally optimized. Accordingly, this study develops a large cross-sectional ionic wind pump with multiple needles-to-mesh electrode, as well as analyzes its flow characteristics using a proposed full three-dimensional simulation method validated with experimental data. To obtain a considerably high outlet average velocity, experimental studies and numerical methods are employed to optimize the pump's configuration parameters, including needle electrode configuration, needle diameter, grid size, and gap between electrodes. The breakdown voltage and highest velocity corresponding to the breakdown voltage increase with an increase in the needle tip-to-mesh gap. After parametric optimization, a maximum velocity of 2.55 m/s and a flow rate of 2868 L/min are achieved. Copyright © 2019 by ASME.

Keyword :

Configuration parameters Flow charac-teristics Full three-dimensional Ionic wind Low energy consumption Numerical investigations Parametric optimization Volumetric flow rate

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GB/T 7714 Zhang, J.F. , Wang, S. , Zeng, M.J. et al. Experimental and numerical investigation on flow characteristics of large cross-sectional ionic wind pump with multiple needles-to-mesh electrode [J]. | Journal of Fluids Engineering, Transactions of the ASME , 2019 , 141 (3) .
MLA Zhang, J.F. et al. "Experimental and numerical investigation on flow characteristics of large cross-sectional ionic wind pump with multiple needles-to-mesh electrode" . | Journal of Fluids Engineering, Transactions of the ASME 141 . 3 (2019) .
APA Zhang, J.F. , Wang, S. , Zeng, M.J. , Qu, Z.G. . Experimental and numerical investigation on flow characteristics of large cross-sectional ionic wind pump with multiple needles-to-mesh electrode . | Journal of Fluids Engineering, Transactions of the ASME , 2019 , 141 (3) .
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Renewable Energy Utilization and Energy Conservation in Thermal and Power Systems for China's Sustainable Energy Future EI SCIE
期刊论文 | 2019 , 145 (1) | Journal of Energy Engineering
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GB/T 7714 Chen, Qun , Min, Yong , Jia, Hongjie et al. Renewable Energy Utilization and Energy Conservation in Thermal and Power Systems for China's Sustainable Energy Future [J]. | Journal of Energy Engineering , 2019 , 145 (1) .
MLA Chen, Qun et al. "Renewable Energy Utilization and Energy Conservation in Thermal and Power Systems for China's Sustainable Energy Future" . | Journal of Energy Engineering 145 . 1 (2019) .
APA Chen, Qun , Min, Yong , Jia, Hongjie , Qu, Zhiguo , Chen, Rong , Chen, Lei . Renewable Energy Utilization and Energy Conservation in Thermal and Power Systems for China's Sustainable Energy Future . | Journal of Energy Engineering , 2019 , 145 (1) .
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One-dimensional numerical study for loop heat pipe with two-phase heat leak model EI
期刊论文 | 2019 , 137 , 467-481 | International Journal of Thermal Sciences
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Abstract :

Heat leak (HL) has a significant influence on the thermal performance of loop heat pipes. It is difficult to measure the HL properties inside the evaporator through proper experiments. In this study, a one-dimensional numerical study is conducted for the HL simulation. A two-phase HL model is proposed, which takes into account the effects of the bubble generation on HL properties and systemic operations. Compared with the traditional conductive HL equation, the present model can clearly describe the two-phase transport characteristics in an evaporator core. The present model is validated by the experimental data of the loop heat pipe (LHP) at different heat loads and heat sink temperatures. The present model improves the prediction accuracy for radial HL in the variable-conductance mode of LHP. By coupling the one-dimensional two-phase HL model with the global LHP model, the two-phase transport properties in the evaporator core, the vapor temperatures, and the HL characteristics are investigated. Due to the existence of bubble generation, the equivalent thermal conductance between the evaporator and reservoir is increased. The HL amount is also induced to increase, which results in an increased vapor temperature especially in the variable-conductance region. The evaporator core contains the subcooled and saturated zones. The variation trends of the fluid temperature, heat transfer coefficient, equilibrium vapor quality, and void fraction are different in the two zones. The subcooled zone in the evaporator core is suggested to be enlarged in order to weaken the effects of bubbles on the system operation. © 2018 Elsevier Masson SAS

Keyword :

Bubble generation Heat leaks Loop Heat Pipe Simulation Two phase

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GB/T 7714 Zhou, L. , Qu, Z.G. , Chen, G. et al. One-dimensional numerical study for loop heat pipe with two-phase heat leak model [J]. | International Journal of Thermal Sciences , 2019 , 137 : 467-481 .
MLA Zhou, L. et al. "One-dimensional numerical study for loop heat pipe with two-phase heat leak model" . | International Journal of Thermal Sciences 137 (2019) : 467-481 .
APA Zhou, L. , Qu, Z.G. , Chen, G. , Huang, J.Y. , Miao, J.Y. . One-dimensional numerical study for loop heat pipe with two-phase heat leak model . | International Journal of Thermal Sciences , 2019 , 137 , 467-481 .
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Pore-scale prediction of the effective mass diffusivity of heterogeneous shale structure using the lattice Boltzmann method SCIE
期刊论文 | 2019 , 133 , 976-985 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
WoS CC Cited Count: 3
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Abstract :

Shale is a kind of heterogeneous porous medium consisting of organic matter (OM), inorganic matter (IM), and interparticle pores. A modified lattice Boltzmann model is developed at the pore-scale to accurately predict the effective mass diffusivity of the heterogeneous shale structure by fully considering the multicomponent and irregular morphological features. The model is validated by the classic empirical formulas and numerical results of the shale with regular IM and OM skeletons. The effects of average gain diameter, irregular structural morphology, porosity, OM volume fraction, and OM diffusivity on the effective mass diffusivity are investigated. The effect of average gain diameter can be ignored. The Nield formula is capable of predicting the effective mass diffusivity of a random OM structure. The formula of Comiti and Renaud can be extended to predict the effective mass diffusivity of a random IM structure by modifying the empirical coefficient to 1.6. The effective mass diffusivity of the heterogeneous shale structure with random OM and IM is between that of pure IM and OM. This effective mass diffusivity increases with the increment of porosity, OM volume fraction, and OM diffusivity. A general empirical formula is proposed to calculate the effective mass diffusivity effectively and conveniently. (C) 2019 Elsevier Ltd. All rights reserved.

Keyword :

Lattice Boltzmann method Organic matter Porous media Shale gas Effective diffusivity

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GB/T 7714 Yin, Y. , Qu, Z. G. , Zhang, J. F. . Pore-scale prediction of the effective mass diffusivity of heterogeneous shale structure using the lattice Boltzmann method [J]. | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2019 , 133 : 976-985 .
MLA Yin, Y. et al. "Pore-scale prediction of the effective mass diffusivity of heterogeneous shale structure using the lattice Boltzmann method" . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 133 (2019) : 976-985 .
APA Yin, Y. , Qu, Z. G. , Zhang, J. F. . Pore-scale prediction of the effective mass diffusivity of heterogeneous shale structure using the lattice Boltzmann method . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2019 , 133 , 976-985 .
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Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix EI Scopus CSCD SCIE
期刊论文 | 2019 , 28 (1) , 1-16 | Journal of Thermal Science
WoS CC Cited Count: 6 SCOPUS Cited Count: 5
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Abstract :

Shale gas is becoming an increasingly promising alternative energy resource because of its high efficiency and environment-friendly characteristic. The amount of adsorbed gas on the shale matrix surfaces and dissolved gas in the shale matrix bulk is the dominant factor in the long-term productivity of shale reservoir. Although experimental measurements have been extensively carried out to investigate the gas adsorption and diffusion properties in the shale matrix, they cannot provide the detailed information on the microscopic transport mechanism of shale gas during the gas production process. Molecular simulation can accurately visualize the gas adsorption/desorption and diffusion processes in the shale matrix. In the present study, the recent research advances of molecular simulation on gas adsorption/desorption and diffusion in the shale matrix are reviewed. Firstly, the density functional theory (DFT) for shale gas molecule desorption/adsorption on the surface of the matrix crystal is illustrated. Then, the grand canonical Monte Carlo (GCMC) method predicting the amount of shale gas desorption/adsorption in the shale matrix crystal is introduced. Finally, molecular dynamics simulation (MD) for gas diffusion in the shale matrix is elucidated. Further developments of the molecular simulation method in shale gas production are also discussed. © 2018, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.

Keyword :

Adsorption/desorption Alternative energy resources Diffusion properties Environment friendly Gas production process Grand canonical Monte carlo Molecular dynamics simulations Molecular simulations

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GB/T 7714 Wand, Hui , Qu, Zhiguo , Yin, Ying et al. Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix [J]. | Journal of Thermal Science , 2019 , 28 (1) : 1-16 .
MLA Wand, Hui et al. "Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix" . | Journal of Thermal Science 28 . 1 (2019) : 1-16 .
APA Wand, Hui , Qu, Zhiguo , Yin, Ying , Bai, Junqiang , Yu, Bo . Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix . | Journal of Thermal Science , 2019 , 28 (1) , 1-16 .
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Experimental study of the selective catalytic reduction after-treatment for the exhaust emission of a diesel engine Scopus SCIE
期刊论文 | 2019 , 147 , 198-204 | Applied Thermal Engineering
SCOPUS Cited Count: 2
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Abstract :

© 2018 Elsevier Ltd In this experimental study, the after-treatment characteristics of urea-based selective catalytic reduction (urea-SCR) in a diesel engine was investigated at a low engine exhaust temperature (250 °C). This represented the idle state of diesel vehicles during road congestion. Detailed experimental work was performed on a heavy-duty diesel engine test bench under the World Harmonized Transient Cycle. The influence of the ammonia/nitrogen ratio was first investigated using vanadium-based SCR (V-SCR) catalyst. When the ammonia/nitrogen ratio was 1.0, the influences of space velocity on the after-treatment characteristics of two different configurations of V-SCR catalysts were investigated in terms of NOX emission, NH3 slip and NOX conversion efficiency. Small SV resulted in reduction of the NH3 slip and the coated-type catalyst indicated more NH3 slip than the extruded-type catalyst at equal catalyst dimensions. It was concluded that the extruded-type V-SCR catalyst showed better operating characteristics than did the coated-type V-SCR catalyst.

Keyword :

Ammonia/nitrogen ratio Catalyst Diesel engine Selective catalytic reduction Space velocity

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GB/T 7714 Xu, H. T. , Luo, Z. Q. , Wang, N. et al. Experimental study of the selective catalytic reduction after-treatment for the exhaust emission of a diesel engine [J]. | Applied Thermal Engineering , 2019 , 147 : 198-204 .
MLA Xu, H. T. et al. "Experimental study of the selective catalytic reduction after-treatment for the exhaust emission of a diesel engine" . | Applied Thermal Engineering 147 (2019) : 198-204 .
APA Xu, H. T. , Luo, Z. Q. , Wang, N. , Qu, Z. G. , Chen, J. , An, L. . Experimental study of the selective catalytic reduction after-treatment for the exhaust emission of a diesel engine . | Applied Thermal Engineering , 2019 , 147 , 198-204 .
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Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump SCIE
期刊论文 | 2019 , 171 , 624-630 | ENERGY
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Abstract :

An ionic wind pump is an energy-saving device that can produce a volume flow when electrodes are applied with high voltage. Compared to the traditional methods, ionic wind pumps possess the advantages of low energy consumption, no moving parts, compact structure and flexible design. In this study, a large-size ionic wind pump, consisting of many single regular hexagonal needle-ring ionic wind generators, was developed as the preliminary model. However, its experimental performance was not as good as our expectations. In order to improve this preliminary model, a simulation method was used to investigate the configuration factors of the single ionic wind pump. In the optimized model, mesh gap is 6 mm, eccentricity is 0.26, section area is 238.44 mm(2) and needle electrode number is 3. In subsequent experiments, the final optimized large-size ionic wind pump showed a great promotion in velocity, and the maximum average velocity of the optimized pump was higher than the preliminary model by 13.3%. Our numerical simulation and experiment results have practical significance in designing ionic wind pumps. (C) 2019 Elsevier Ltd. All rights reserved.

Keyword :

Experiment Configuration optimization Ionic wind pump Numerical simulation Large-size

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GB/T 7714 Zhang, Jianfei , Kong, Lingjian , Qu, Jingguo et al. Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump [J]. | ENERGY , 2019 , 171 : 624-630 .
MLA Zhang, Jianfei et al. "Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump" . | ENERGY 171 (2019) : 624-630 .
APA Zhang, Jianfei , Kong, Lingjian , Qu, Jingguo , Wang, Shuang , Qu, Zhiguo . Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump . | ENERGY , 2019 , 171 , 624-630 .
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Numerical Study on Thermal Characteristics of a Micro-Encapsulated Phase Change Composite Plate EI Scopus CSCD PKU
期刊论文 | 2018 , 39 (5) , 1078-1084 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

A coupling numerical model, basing on the enthalpy formulation, is established to study the heat transfer performances of micro-encapsulated phase change composite plate. The temperature profiles and the movement features of solid-liquid phase interface are obtained. The effects of different Stefan numbers, variable phase change temperature scopes are investigated, and none-phase change material condition is calculated. The results show that micro-encapsulated phase change material (MEPCM) plays a great role in thermal insulation. The movement speed of solid phase interface is higher than that of liquid phase interface and the movement speed of liquid phase interface increases obviously when all of the solid phase melted. Furthermore, with the increase of Stefan Number, the movement speeds of the two interfaces and the plate temperature increase. Additionally, the movement speed of solid phase interface and the acceleration of liquid phase interface in the end of phase change process rise with the phase change temperature scope increase. However, the phase change temperature scope has a limited impact on the completely melting time. © 2018, Science Press. All right reserved.

Keyword :

Composite plates Encapsulated phase change materials Heat transfer performance Numerical calculation Phase change heat transfer Phase change temperature Thermal characteristics Thermal Protection System

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GB/T 7714 Fu, Yun-Di , Qu, Zhi-Guo , Zhang, Jia-Jie . Numerical Study on Thermal Characteristics of a Micro-Encapsulated Phase Change Composite Plate [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (5) : 1078-1084 .
MLA Fu, Yun-Di et al. "Numerical Study on Thermal Characteristics of a Micro-Encapsulated Phase Change Composite Plate" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 5 (2018) : 1078-1084 .
APA Fu, Yun-Di , Qu, Zhi-Guo , Zhang, Jia-Jie . Numerical Study on Thermal Characteristics of a Micro-Encapsulated Phase Change Composite Plate . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (5) , 1078-1084 .
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Erratum to: Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix (Journal of Thermal Science, (2018), 10.1007/s11630-018-1053-9) EI Scopus CSCD
期刊论文 | 2018 | Journal of Thermal Science
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Abstract :

In the originally published article version the family name of first author WANG Hui was misspellt “WAND”. The original article has been corrected. © 2018, Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.

Keyword :

Adsorption/desorption Molecular simulations Thermal science

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GB/T 7714 Wang, Hui , Qu, Zhiguo , Yin, Ying et al. Erratum to: Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix (Journal of Thermal Science, (2018), 10.1007/s11630-018-1053-9) [J]. | Journal of Thermal Science , 2018 .
MLA Wang, Hui et al. "Erratum to: Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix (Journal of Thermal Science, (2018), 10.1007/s11630-018-1053-9)" . | Journal of Thermal Science (2018) .
APA Wang, Hui , Qu, Zhiguo , Yin, Ying , Bai, Junqiang , Yu, Bo . Erratum to: Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix (Journal of Thermal Science, (2018), 10.1007/s11630-018-1053-9) . | Journal of Thermal Science , 2018 .
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Energy Conversion Study Based On Nanoparticle Plasmonic Solar Cell EI CSCD PKU
期刊论文 | 2018 , 39 (1) , 179-184 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

Based on nanoparticle plasmonic solar cell, the photoelectronic performance of solar cell matrix and photothermal performance of nanoparticles after light absorption were comprehensively analysed. The energy conversion for photothermal or photoelectronic process can be regulated and controlled by varying particles' size materials and shape. The results show that silver particles give stronger enhancement on photoelectronic performance while gold particles behaves better on photothermal performance. For spherical silver particles, both the photoelectronic and photothermal performance could be enhanced with the increase of diameter. For spherical gold particles, photothermal performance would be enhanced but photoelectronic performance weakened. For both cylindrical silver and gold particles, photoelectronic performance could be weakened with the increase of diameter, while photothermal performance enhanced. © 2018, Science Press. All right reserved.

Keyword :

Cell matrix Gold particles Photo-thermal Photoelectronic Plasmonic enhancements Plasmonic solar cells Silver particles

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GB/T 7714 Zhang, Jia-Jia , Qu, Zhi-Guo , Liu, Yong . Energy Conversion Study Based On Nanoparticle Plasmonic Solar Cell [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (1) : 179-184 .
MLA Zhang, Jia-Jia et al. "Energy Conversion Study Based On Nanoparticle Plasmonic Solar Cell" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 1 (2018) : 179-184 .
APA Zhang, Jia-Jia , Qu, Zhi-Guo , Liu, Yong . Energy Conversion Study Based On Nanoparticle Plasmonic Solar Cell . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (1) , 179-184 .
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