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学者姓名:刘中良
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Abstract :
Non-equilibrium phase transition flow is prevalent and of great irreversible loss during the transonic mixing process of steam ejector, but its complex evolution law is thus far unclear. In this study, a considerate two-phase ejector model was developed to investigate the non-equilibrium phase transition flow characteristics by means of CFD numerical simulation, including how, where and to what extent the phase transition occurs. Additionally, the quantitative analysis of the operating parameters influences on the phase transition flow and ejector's entrainment performance were conducted. Results showed that the evolution law of condensate is highly consistent with the pressure fluctuation of shock wave. Non-equilibrium condensation is to be intensified as the primary fluid pressure increases, and the entrainment performance thus worsens. For raising the secondary fluid pressure, the case is opposite, the entrainment ratio w increases by 17.8 %. Superheating the working fluids can restrain the droplet development, and more small-sized droplets therefore emerge, but w only raises by a maximum of 3.53 %. However, it is hard to restrain the condensate generation in primary jet flow by superheating the secondary fluid, both suction pressure and w decrease. This study provides meaningful guidance for reducing the irreversibility loss from non-equilibrium phase transition flow.
Keyword :
Performance improvement Performance improvement Operating parameters analysis Operating parameters analysis Non-equilibrium phase transition flow Non-equilibrium phase transition flow Steam ejector Steam ejector difference difference Shock wave Shock wave
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| GB/T 7714 | Tang, Yongzhi , Zhong, Zilong , Liu, Zhongliang et al. Study on evolution law of non-equilibrium phase transition flow and performance improvement of steam ejector for MED-TVC desalination system [J]. | ENERGY , 2025 , 316 . |
| MLA | Tang, Yongzhi et al. "Study on evolution law of non-equilibrium phase transition flow and performance improvement of steam ejector for MED-TVC desalination system" . | ENERGY 316 (2025) . |
| APA | Tang, Yongzhi , Zhong, Zilong , Liu, Zhongliang , Lu, Lin , Huang, Yichen , Wen, Chuang . Study on evolution law of non-equilibrium phase transition flow and performance improvement of steam ejector for MED-TVC desalination system . | ENERGY , 2025 , 316 . |
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Abstract :
The effects of cold surface temperature, wet air state (temperature and humidity) and original drop size on frost dendrites growth of two neighboring separate frozen water drops of same size under natural convection conditions were investigated by quantitative measurement. It was determined that for different cold plate surface temperature conditions, i.e., the ordinary-low temperature and the cryogenic temperature range, the frost formation mechanism is different. Under the conditions that the air temperature is not too high and absolute humidity is not too excessive, the influence of frozen water drop size on the longest dendrite of frost crystals becomes more and more obvious with the decrease in cold plate temperature. The changes in air temperature and relative humidity both change air absolute humidity, so they have similar effects on the growth of dendrites. However, the effect of wet air state on the growth of frost dendrites is not monotonous, which needs to be considered comprehensively in combination with heat and mass transfer and the existence of heavy phase layer. The thickness of 'the initial continuous frost layer' was measured and it was disclosed that the initial frost layer thickness is 1.7-3.0 times that of the height of the frozen water drop diameter. This value may be possibly used as initial frost layer thickness in heat and mass transfer-based frost layer growth prediction models, at least for ordinary-low temperature conditions.
Keyword :
initial frost layer thickness initial frost layer thickness dendrite growth dendrite growth frost crystal frost crystal cryogenic cold surface cryogenic cold surface
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| GB/T 7714 | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia et al. Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions [J]. | ENERGIES , 2023 , 16 (4) . |
| MLA | Yu, Fengjiao et al. "Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions" . | ENERGIES 16 . 4 (2023) . |
| APA | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia , Chen, Yanling , Li, Yi . Experimental Study of Frost Crystals Dendrite Growth on Two Neighboring Separate Frozen Water Drops on a Cryogenic Cold Surface under Natural Convection Conditions . | ENERGIES , 2023 , 16 (4) . |
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Abstract :
Quantitative measurements were carried out of the dendrite frost crystal growth under natural convection conditions on a frozen water drop sitting on a cold surface whose temperature is as low as-190 degrees C to study the effects of cold surface temperature, wet air state and original water drop size. In order to classify the influences of different cold surface temperature regions, the frost crystal dendrite growth of both ordinary-low and cryogenic cold surface temperatures were investigated. It was found that the cold plate surface temperature has a direct influence on frost formation mechanism. Decreasing the cold surface temperature for ordinary-low cold surface temperatures will enhance and for cryogenic cold surface temperatures will suppress the frost crystal dendritic growth of the frozen water drop. The measurements disclosed that the length of the longest frost crystal dendrite grows almost linearly with time, esp. in the early stage. The effects of the water drop sizes on the longest frost crystal dendrite growth become more and more obvious as the cold surface temperature decreases. The influence of air relative humidity on the frost crystal dendrite growth is something similar to that of air temperature under given conditions, since their change both changes the absolute air humidity. A very peculiar phenomenon, i.e. the influence of wet air state on frost crystal dendrite growth is not monotonous, was observed. These findings are important for understanding and studying the frost formation and growth, especially the initial frost formation period, on low temperature surfaces.
Keyword :
Cryogenic cold surface Cryogenic cold surface Natural convection Natural convection Dendrite growth Dendrite growth Frost crystal Frost crystal
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| GB/T 7714 | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia et al. Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions [J]. | INTERNATIONAL JOURNAL OF REFRIGERATION , 2022 , 144 : 305-315 . |
| MLA | Yu, Fengjiao et al. "Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions" . | INTERNATIONAL JOURNAL OF REFRIGERATION 144 (2022) : 305-315 . |
| APA | Yu, Fengjiao , Liu, Zhongliang , Li, Yanxia , Chen, Yanling , Li, Yi . Experimental study of frost crystal dendrite growth on a cryogenic cold surface under natural convection conditions . | INTERNATIONAL JOURNAL OF REFRIGERATION , 2022 , 144 , 305-315 . |
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Abstract :
Flow and heat transfer characteristics of oil-based drilling cuttings in a screw-driving spiral heat exchanger were numerically simulated. The influence of spiral tube rotation speed, Reynolds number of oil-based drilling cuttings, cross-sectional shape on flow and heat transfer characteristics were studied. The results show that with rotation speed increases, the heat transfer coefficient and outlet temperature of oil-based drilling cuttings all increase. In addition, when Reynolds number is less than 250, Nusselt number increases rapidly with the increase of Reynolds number, and Reynolds number has little influence on Nusselt number when it is more than 250. Besides, Nusselt number increases with the increase of curvature ratio di=D. In order to facilitate engineering design, a correlation for heat transfer of oil-based drilling cuttings flowing in the shell side of the heat exchanger is obtained. © 2021, Science Press. All right reserved.
Keyword :
Infill drilling Infill drilling Reynolds number Reynolds number Heat exchangers Heat exchangers Screws Screws Nusselt number Nusselt number
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| GB/T 7714 | Zhao, Fei , Li, Yan-Xia , Liu, Zhong-Liang et al. Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger [J]. | Journal of Engineering Thermophysics , 2021 , 42 (4) : 959-965 . |
| MLA | Zhao, Fei et al. "Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger" . | Journal of Engineering Thermophysics 42 . 4 (2021) : 959-965 . |
| APA | Zhao, Fei , Li, Yan-Xia , Liu, Zhong-Liang , Mi, Fu-Lin , Gao, Li-Qing , Li, Qing-Fang et al. Flow and Heat Transfer Characteristics of Oil-based Drilling Cuttings in Screw-driving Spiral Heat Exchanger . | Journal of Engineering Thermophysics , 2021 , 42 (4) , 959-965 . |
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Abstract :
利用化学及电化学方法将非贵金属催化剂石墨烯(rGO)和纳米MnO2依次负载到三维多孔不锈钢纤维毡(Stainless steel fiber felt,SSFF)集电体上制备微生物燃料电池(Microbial fuel cell,MFC)空气阴极.在增大空气阴极活化面积的同时有效减小接触阻抗.通过物理和电化学方式测试表征其形貌、氧还原特性.在MFC中的运行结果表明,负载5 mL还原性氧化石墨烯再浸渍生长MnO2的不锈钢纤维毡(rGO@MnO2-SSFF)空气阴极的最大功率密度(524.34 mW/m2)是不锈钢纤维毡阴极(58.21 mW/m2)的9倍.经过复合催化剂rGO@MnO2修饰之后的不锈钢纤维毡空气阴极可以应用于MFC并大幅改良SSFF空气阴极的氧还原催化性能.
Keyword :
不锈钢纤维毡 不锈钢纤维毡 纳米二氧化锰 纳米二氧化锰 氧化石墨烯 氧化石墨烯 空气阴极 空气阴极 微生物燃料电池 微生物燃料电池
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| GB/T 7714 | 陈稳稳 , 牛恒 , 刘中良 . 一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备 [J]. | 现代化工 , 2021 , 41 (3) : 88-91 . |
| MLA | 陈稳稳 et al. "一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备" . | 现代化工 41 . 3 (2021) : 88-91 . |
| APA | 陈稳稳 , 牛恒 , 刘中良 . 一体式无粘结剂rGO@MnO2不锈钢纤维毡空气阴极的制备 . | 现代化工 , 2021 , 41 (3) , 88-91 . |
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Abstract :
一体式无粘结剂rGO@MnO_(2)不锈钢纤维毡空气阴极的制备
Keyword :
微生物燃料电池 微生物燃料电池 氧化石墨烯 氧化石墨烯 纳米二氧化锰 纳米二氧化锰 空气阴极 空气阴极 不锈钢纤维毡 不锈钢纤维毡
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| GB/T 7714 | 陈稳稳 , 牛恒 , 刘中良 et al. 一体式无粘结剂rGO@MnO_(2)不锈钢纤维毡空气阴极的制备 [J]. | 陈稳稳 , 2021 , 41 (3) : 88-91 . |
| MLA | 陈稳稳 et al. "一体式无粘结剂rGO@MnO_(2)不锈钢纤维毡空气阴极的制备" . | 陈稳稳 41 . 3 (2021) : 88-91 . |
| APA | 陈稳稳 , 牛恒 , 刘中良 , 现代化工 . 一体式无粘结剂rGO@MnO_(2)不锈钢纤维毡空气阴极的制备 . | 陈稳稳 , 2021 , 41 (3) , 88-91 . |
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Abstract :
水泥熟料生产企业CO2直接排放核算模型的建立
Keyword :
CO2排放量核算 CO2排放量核算 实际产能 实际产能 生产时长 生产时长 CO2排放清单 CO2排放清单 水泥熟料生产企业 水泥熟料生产企业 水泥熟料烧成煤耗 水泥熟料烧成煤耗
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| GB/T 7714 | 杨楠 , 李艳霞 , 赵盟 et al. 水泥熟料生产企业CO2直接排放核算模型的建立 [J]. | 杨楠 , 2021 , 17 (1) : 79-87 . |
| MLA | 杨楠 et al. "水泥熟料生产企业CO2直接排放核算模型的建立" . | 杨楠 17 . 1 (2021) : 79-87 . |
| APA | 杨楠 , 李艳霞 , 赵盟 , 吕晨 , 刘中良 , 陈莎 et al. 水泥熟料生产企业CO2直接排放核算模型的建立 . | 杨楠 , 2021 , 17 (1) , 79-87 . |
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Abstract :
油基钻屑螺纹推进式换热器流动传热特性
Keyword :
截面形状 截面形状 数值模拟 数值模拟 螺纹推进式 螺纹推进式 油基钻屑 油基钻屑 流动换热 流动换热
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| GB/T 7714 | 赵飞 , 李艳霞 , 刘中良 et al. 油基钻屑螺纹推进式换热器流动传热特性 [J]. | 赵飞 , 2021 , 42 (4) : 959-965 . |
| MLA | 赵飞 et al. "油基钻屑螺纹推进式换热器流动传热特性" . | 赵飞 42 . 4 (2021) : 959-965 . |
| APA | 赵飞 , 李艳霞 , 刘中良 , 密夫林 , 高立青 , 李清方 et al. 油基钻屑螺纹推进式换热器流动传热特性 . | 赵飞 , 2021 , 42 (4) , 959-965 . |
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Abstract :
在自然对流条件下对竖直放置的透明超疏水表面和无修饰玻璃表面可视化结霜研究.结果表明,纳米二氧化硅在表面形成了几百纳米的纳米聚集团,使得表面凹凸不平,这种结构与荷叶表面的均有类似的微纳粗糙结构,制备出的表面最大接触角为153.1°,表面具有超疏水特性;在不同粒径下研究发现随着纳米二氧化硅粒径的降低其接触角是逐渐增大的;涂层会对表面透射率产生影响,15nm下的表面透射率仅降低8.86%;粒径越小制作出的表面能够更有效的抑制霜层的增长,15nm的表面抑霜时间可延长至770s,相比没有涂层的表面延长了 165.5%.
Keyword :
疏水性 疏水性 纳米二氧化硅 纳米二氧化硅 实验. 实验.
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| GB/T 7714 | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米Si02的透明疏水表面制备与抑霜性能研究 [J]. | 制冷与空调(四川) , 2021 , 35 (3) : 312-320 . |
| MLA | 范鹏艳 et al. "基于纳米Si02的透明疏水表面制备与抑霜性能研究" . | 制冷与空调(四川) 35 . 3 (2021) : 312-320 . |
| APA | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米Si02的透明疏水表面制备与抑霜性能研究 . | 制冷与空调(四川) , 2021 , 35 (3) , 312-320 . |
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Abstract :
在自然对流条件下对竖直放置的透明超疏水表面和无修饰玻璃表面可视化结霜研究。结果表明,纳米二氧化硅在表面形成了几百纳米的纳米聚集团,使得表面凹凸不平,这种结构与荷叶表面的均有类似的微纳粗糙结构,制备出的表面最大接触角为153.1°,表面具有超疏水特性;在不同粒径下研究发现随着纳米二氧化硅粒径的降低其接触角是逐渐增大的;涂层会对表面透射率产生影响,15nm下的表面透射率仅降低8.86%;粒径越小制作出的表面能够更有效的抑制霜层的增长,15nm的表面抑霜时间可延长至770s,相比没有涂层的表面延长了165.5%。
Keyword :
实验 实验 疏水性 疏水性 纳米二氧化硅 纳米二氧化硅
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| GB/T 7714 | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米SiO_2的透明疏水表面制备与抑霜性能研究 [J]. | 制冷与空调(四川) , 2021 , 35 (03) : 312-320 . |
| MLA | 范鹏艳 et al. "基于纳米SiO_2的透明疏水表面制备与抑霜性能研究" . | 制冷与空调(四川) 35 . 03 (2021) : 312-320 . |
| APA | 范鹏艳 , 刘中良 , 李艳霞 . 基于纳米SiO_2的透明疏水表面制备与抑霜性能研究 . | 制冷与空调(四川) , 2021 , 35 (03) , 312-320 . |
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