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学者姓名：韩昌亮
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Abstract ：
Supercritical heat transfer deterioration (HTD) phenomenon in tubes is frequently manifested as the distribution of multi-peak wall temperature along the tube length. Quantifying the HTD characteristics of supercritical methane (S-CH4) in a horizontal tube is critical for improving thermal control of liquefied natural gas (LNG) vaporizers. In this paper, four different regasification heat transfer modes of S-CH4 are firstly clarified, and the pseudo-phase distribution and vapor-like film (VLF) variations under different modes are also identified. Moreover, the mechanism of multi-peak HTD is deeply unveiled based on the progressive pseudo-boiling theory and virtual orifice contraction effect. Results demonstrate that one normal heat transfer and three HTD (singlepeak, double-peak and triple-peak) modes are observed. The thickness of VLF (SVLF) near the top generatrix is much greater than that at the bottom generatrix, the former (0.505 mm) is 14 times that of the latter (0.035 mm) on the typical cross-section under the single-peak HTD mode. When HTD occurs, the expanding VLF will exert a virtual orifice on the core liquid-like flow. The alternating dominance of evaporation momentum force and inertia force mainly causes periodic SVLF. The average SVLF,bot decreases by 62.19% when mass flux increases from 370 kg/m2 & sdot;s to 650 kg/m2 & sdot;s, which attributes to the variations of thermal conductivity and specific heat of VLF. Rising pressure can yield smaller supercritical K number and thinner quantitative SVLF. The average SVLF,bot decreases 73.91% when pressure increases from 6.93 MPa to 12.5 MPa. Finally, novel assessment system and pattern maps of multi-peak HTD for S-CH4 are established. Two new dimensionless correlations are proposed to predict the multi-peak wall temperature position and magnitude of S-CH4 with the mean absolute relative deviations of 16.98% and 6.56%. The present findings not only benefit the understanding of supercritical heat transfer, but also provide crucial reference insights for thermal design and operational safety standards of LNG vaporizers or other related engineering equipment.
Keyword ：
Heat transfer deterioration Heat transfer deterioration Multi-peak wall temperature Multi-peak wall temperature Pseudo-boiling theory Pseudo-boiling theory Supercritical methane Supercritical methane
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| GB/T 7714 | Han, Changliang , Chen, Zhipeng , Chen, Yuhang et al. Mechanism analysis of multi-peak wall temperature of regasification heat transfer deterioration for supercritical methane in a horizontal tube [J]. | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2026 , 255 . |
| MLA | Han, Changliang et al. "Mechanism analysis of multi-peak wall temperature of regasification heat transfer deterioration for supercritical methane in a horizontal tube" . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 255 (2026) . |
| APA | Han, Changliang , Chen, Zhipeng , Chen, Yuhang , Deng, Haokang . Mechanism analysis of multi-peak wall temperature of regasification heat transfer deterioration for supercritical methane in a horizontal tube . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2026 , 255 . |
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为了实现沉浸式气化器（SCV）烟气分布器高效设计，利用实验与数值模拟相结合的方法，研究了烟气分布器布气性能与多目标参数优化，揭示了烟气分布器场特性、偏流/空流机理及多目标响应面规律。结果表明，由于分流作用，分支管存在明显偏流现象，迎风侧烟气速度较大，盲端附近存在局部“低温区”；受变质量流动影响，分支管内烟气轴向速度逐渐降低，轴向压力逐渐增大；上游分支管排气速度不均匀度较低，故布气性能较优；为了保证烟气分布器正常布气，气孔压力应大于临界布气压力；当烟气入口速度为0.05 m/s时，部分分支管出现了空流现象，提出了临界入口速度与分支管临界长径比的预测公式；基于响应面分析方法，发现自变量因素对气孔排气速度不均匀度影响程度由小到大依次为气孔数目、气孔直径及分支管长度。研究结果可为SCV烟气分布器优化设计提供参考。
Keyword ：
优化设计 优化设计 多目标参数 多目标参数 布气性能 布气性能 沉浸式气化器 沉浸式气化器 烟气分布器 烟气分布器
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| GB/T 7714 | 陈宇航 , 陈金国 , 陈炜毅 et al. 沉浸式气化器烟气分布器布气性能与多目标参数优化 [J]. | 化工学报 , 2025 , 76 (07) : 3274-3285 . |
| MLA | 陈宇航 et al. "沉浸式气化器烟气分布器布气性能与多目标参数优化" . | 化工学报 76 . 07 (2025) : 3274-3285 . |
| APA | 陈宇航 , 陈金国 , 陈炜毅 , 王康 , 郑昊 , 韩昌亮 . 沉浸式气化器烟气分布器布气性能与多目标参数优化 . | 化工学报 , 2025 , 76 (07) , 3274-3285 . |
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The regasification technology in natural gas applications mostly involves supercritical methane (sCH(4)) heat transfer inside horizontal heated circular tubes. Precise evaluation of heat transfer behaviors and wall temperature is valuable for optimal design of advanced regasification equipment such as submerged combustion vaporizer (SCV) and intermediate fluid vaporizer (IFV). In this paper, the convective regasification heat transfer performance of sCH(4) is investigated. Different heat transfer modes about normal heat transfer (NHT) and heat transfer deterioration (HTD) are observed. The mechanism of bimodal phenomenon is revealed through dividing five zones. Moreover, the transition law between NHT and HTD is deeply analyzed by holding the pseudo-boiling concept. Results show that there exist the multiple wall temperature peaks when HTD occurs. Two peaks mainly result from buoyancy effect near the wall region and shear stress in the mainstream region. Moreover, HTD is relevant to the rapid growth and large temperature gradient of gas-like fluid. The critical supercritical boiling number yielding for sCH(4) is 8.415 x 10(-4 similar to)8.789 x 10(-4). Finally, a new criterion concerning with critical heat flux is proposed to judge the occurrence of HTD. The present work lays a new way to understand the sCH(4) regasification mechanism and provides reference for efficient operation of SCV and IFV.
Keyword ：
Critical heat flux Critical heat flux Heat transfer deterioration Heat transfer deterioration Pseudo-boiling concept Pseudo-boiling concept Supercritical boiling number Supercritical boiling number Supercritical methane Supercritical methane
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| GB/T 7714 | Chen, Zhipeng , Han, Changliang , Zheng, Hao et al. An investigation on convective regasification heat transfer performance of supercritical methane inside horizontal heated circular tubes [J]. | ENERGY , 2025 , 314 . |
| MLA | Chen, Zhipeng et al. "An investigation on convective regasification heat transfer performance of supercritical methane inside horizontal heated circular tubes" . | ENERGY 314 (2025) . |
| APA | Chen, Zhipeng , Han, Changliang , Zheng, Hao , Wu, Yizhong . An investigation on convective regasification heat transfer performance of supercritical methane inside horizontal heated circular tubes . | ENERGY , 2025 , 314 . |
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Bubble column reactors fitted with tube bundles (BCR TB) belong to common heat transfer equipment in the field of chemical engineering, yet the complicated thermal-hydraulics performance of BCR TB has not been deeply revealed. To fill this gap, the present study proposes a novel variable bubble size modeling approach based on the Euler-Euler two-fluid framework, which is coupled with the population balance model considering comprehensive interphase forces. On the basis of verifying numerical reliability using experimental data, the mechanism of bubble swarm flow around the tube bundle and the effects of gas sparger configurations on the thermal-hydraulics performance of BCR TB are investigated. Results indicate that the entire tube bundle can be divided into three distinct zones, namely the sparger effect zone, fully developed zone and interface effect zone in view of the local mixture-to-wall heat transfer coefficient. The maximum peak value of the mixture-to-wall heat transfer coefficient always appears at 210 of heat exchange tubes. When the orifice diameter is 4 mm, the axial gradient of gas holdup is relatively large due to more intense shearing and fragmentation effects. Interestingly, the fractions of medium-sized and large-sized bubbles are not sensitive to orifice angle. Both the mixture-to-wall heat transfer coefficient and the friction factor decrease initially and then increase when the installation height increases. Under the optimized gas sparger structure configuration, the mixture-to-wall heat transfer coefficient increases by 10.23%, accompanied by the reduction of pressure drop by 8.14%, ultimately attaining a system energy conversion efficiency of 97.88% and performance evaluation criterion of 1.087. Finally, a new dimensionless and semi-theoretical Nusselt correlation incorporating a structural correction factor with an average absolute deviation of 5.15% is developed. The findings can offer useful guidance for the optimal design of BCR TB. © 2025 The Authors.
Keyword ：
Bubble columns Bubble columns Bubbles (in fluids) Bubbles (in fluids) Conversion efficiency Conversion efficiency Energy efficiency Energy efficiency Fits and tolerances Fits and tolerances Heat transfer performance Heat transfer performance Hydraulic machinery Hydraulic machinery Hydraulics Hydraulics Mass transfer Mass transfer Optimal systems Optimal systems Orifices Orifices Thermal Engineering Thermal Engineering Tubes (components) Tubes (components)
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| GB/T 7714 | Wu, Yizhong , Han, Changliang , Xu, Jianquan et al. An Investigation on the Thermal-Hydraulics Performance of a Bubble Column Reactor Fitted with Tube Bundle under Different Gas Sparger Configurations [J]. | Frontiers in Heat and Mass Transfer , 2025 , 23 (4) : 1103-1128 . |
| MLA | Wu, Yizhong et al. "An Investigation on the Thermal-Hydraulics Performance of a Bubble Column Reactor Fitted with Tube Bundle under Different Gas Sparger Configurations" . | Frontiers in Heat and Mass Transfer 23 . 4 (2025) : 1103-1128 . |
| APA | Wu, Yizhong , Han, Changliang , Xu, Jianquan , Ying, Long , Wang, Kang . An Investigation on the Thermal-Hydraulics Performance of a Bubble Column Reactor Fitted with Tube Bundle under Different Gas Sparger Configurations . | Frontiers in Heat and Mass Transfer , 2025 , 23 (4) , 1103-1128 . |
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Liquefied natural gas vaporizers serve as prominent regasification equipment in engineering receiving terminals. Nevertheless, the lack of comparative data and dimensionless correlations hinders the optimization of heat exchanger tubes for vaporizers. In this paper, the comprehensive regasification thermal-hydraulics performance of supercritical methane (S-CH4) in tubes with different structures-straight tube (ST), helical tube (HT) and coil tube (CT) is analyzed using computational fluid dynamics simulation methods. The variations of regasification thermodynamic parameters of S-CH4 in ST, HT and CT are revealed. The effects of the ratio of heat flux to mass flux, pressure, buoyancy and gravity on the regasification heat transfer of S-CH4 are also studied. Notably, the progressive supercritical boundary layer theory is adopted to explain performance differences. The key findings show that the curvature-induced centrifugal forces in HT and CT disrupt the symmetry of regasification kinetic parameters, enhancing the heat transfer coefficient by 28.5 % and 30.4 % compared to ST. As pressure increases, geometry-induced turbulence gradually diminishes relative to specific heat-driven thermal transport. ST exhibits the largest hydrodynamic boundary layer thickness with the upper part of 2.72 mm and the lower part of 1.74 mm due to buoyancy-driven stratification. ST demonstrates higher quantitative vorticity magnitudes in the boundary layer compared to HT and CT. Finally, three new dimensionless correlations incorporating a pseudo-boiling K number are respectively developed for S-CH4 in ST, HT and CT, yielding the expression of Nub = CRebn1Prbn2Kn3.The negative exponents (-0.0714,-0.0729 and-0.0549) for K number can effectively clarify enhanced regasification heat transfer of S-CH4 at elevated pressures. These findings can provide valuable insights for designing heat exchange tubes of vaporizers.
Keyword ：
Boundary layer theory Boundary layer theory Dimensionless correlations Dimensionless correlations Pseudo-boiling K number Pseudo-boiling K number Regasification thermal-hydraulics performance Regasification thermal-hydraulics performance Supercritical methane Supercritical methane
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| GB/T 7714 | Chen, Zhipeng , Deng, Haokang , Wu, Yizhong et al. Comparative regasification thermal-hydraulics performance analyses of supercritical methane in tubes with different structures [J]. | CRYOGENICS , 2025 , 152 . |
| MLA | Chen, Zhipeng et al. "Comparative regasification thermal-hydraulics performance analyses of supercritical methane in tubes with different structures" . | CRYOGENICS 152 (2025) . |
| APA | Chen, Zhipeng , Deng, Haokang , Wu, Yizhong , Wang, Kang , Han, Changliang . Comparative regasification thermal-hydraulics performance analyses of supercritical methane in tubes with different structures . | CRYOGENICS , 2025 , 152 . |
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Direct contact gas-liquid-solid reactor pertains to an extremely high efficiency heat-exchange facility in industrial application. Nevertheless, the scarcity of quantitative analysis data hinders the optimal design of this type of reactor. In the present study, a novel variable bubbles size modeling approach which considers the bubble swarms breakup and coalescence rates, is proposed to evaluate the complex thermal-hydraulics performance of bubble swarms sweeping tube bundles. On the basis of verifying the responsibility of the numerical modelling with published experimental data, the intrinsic link of hydrodynamics and thermodynamics parameters on reactor features, including field characteristics, gas holdup, bubble swarms diameter distribution, gas-liquid interfacial area, temperature difference and heat flux inside different tube bundles regions, are deeply revealed. Results demonstrate that the temperature difference between bubble swarms and tube bundles walls is approximately equal to 2 K. Interestingly, different positions of heat exchanging tubes affect the peak value of circumferential heat transfer coefficient. For typical Tube 1-2, the maximum value of 3146.28 W/m2 & sdot;K appears around 162 degrees. The presence of tube bundles gives rise to the well-distributed iso-surfaces of bubble swarms which contributes to enhance heat transfer. When superficial gas velocities are respectively 0.09 m/s, 0.12 m/s and 0.14 m/s, the average bubble warms diameters are 13.47 mm, 16.22 mm and 17.24 mm. When initial liquid phase height increases from 342 mm to 378 mm, the corresponding gas-liquid interfacial area decreases by 16.2 % in total. Finally, two new modified dimensionless correlations were developed for the prediction of gas holdup and Nusselt number. The prediction errors are respectively 10 % and 6 %. The findings can improve the awareness for promising applications in design and scale-up processes of direct contact gas-liquid-solid reactor.
Keyword ：
Bubble swarms Bubble swarms Direct contact gas-liquid-solid reactor Direct contact gas-liquid-solid reactor Thermal-hydraulics performance Thermal-hydraulics performance Tube bundles Tube bundles Variable bubbles size modeling Variable bubbles size modeling
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| GB/T 7714 | Han, Changliang , Huang, Yiyan , Guo, Weiping et al. Thermal-hydraulics performance evaluation of bubble swarms sweeping tube bundles in a direct contact gas-liquid-solid reactor [J]. | APPLIED THERMAL ENGINEERING , 2024 , 250 . |
| MLA | Han, Changliang et al. "Thermal-hydraulics performance evaluation of bubble swarms sweeping tube bundles in a direct contact gas-liquid-solid reactor" . | APPLIED THERMAL ENGINEERING 250 (2024) . |
| APA | Han, Changliang , Huang, Yiyan , Guo, Weiping , Wu, Yizhong , Chen, Zhipeng , Li, Xibing . Thermal-hydraulics performance evaluation of bubble swarms sweeping tube bundles in a direct contact gas-liquid-solid reactor . | APPLIED THERMAL ENGINEERING , 2024 , 250 . |
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绝缘栅双极型晶体管（IGBT）模块是电机控制器的核心部件，在工程应用中，常由于结温过高导致器件损毁，对控制器的可靠性影响重大。为探究IGBT模块内部的温度场分布，文章进行了损耗建模，并通过Fluent软件进行了结温估算。在控制器额定工况下，IGBT芯片最高结温约为113℃，IGBT与二极管芯片最高温度差接近10℃。同时分析了冷却液流速变化对电机控制器散热性能的影响，根据芯片最高温度及进出口压降，确定冷却液流速在1～2 m/s范围内为最佳区间，为电机控制器的散热性能设计提供参考依据。
Keyword ：
IGBT IGBT 损耗 损耗 电机控制器 电机控制器 结温 结温
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| GB/T 7714 | 张鑫磊 , 应龙 , 韩昌亮 et al. 基于Fluent流固耦合的电机控制器功率器件结温仿真分析 [J]. | 机电技术 , 2024 , 6 (01) : 47-51,68 . |
| MLA | 张鑫磊 et al. "基于Fluent流固耦合的电机控制器功率器件结温仿真分析" . | 机电技术 6 . 01 (2024) : 47-51,68 . |
| APA | 张鑫磊 , 应龙 , 韩昌亮 , 徐建全 , 雷学国 . 基于Fluent流固耦合的电机控制器功率器件结温仿真分析 . | 机电技术 , 2024 , 6 (01) , 47-51,68 . |
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为了实现微通道换热器表面结构的高效设计，本文将数值模拟和实验手段相结合，以超临界氮气（supercritical nitrogen,SCN_2）为流体工质，研究了不同凹穴形状（直微通道、圆形、矩形和梯形）和椭圆度对微通道流动与传热特性的影响，揭示了SCN_2高效低阻强化换热机理。结果表明，相比于直微通道，圆形凹穴微通道中轴线上SCN_2速度达到稳定值所需入口段距离更短，这是由于凹穴能够促使流体流动/热边界层一直处于破坏与重建的交替状态。圆形凹穴内流体旋涡形状与凹穴几何结构保持一致，其流阻特性和换热性能最优，梯形凹穴微通道次之，矩形凹穴微通道最差。微通道综合性能随着凹穴椭圆度增加呈先升高后降低变化趋势，当椭圆度为1时，其综合性能最优。研究结果对提高微通道换热器设计制造能力具有重要的意义。
Keyword ：
凹穴 凹穴 微通道 微通道 流动与传热 流动与传热 结构 结构 超临界氮气 超临界氮气
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| GB/T 7714 | 韩昌亮 , 黄峄演 , 徐建全 . 不同结构凹穴微通道内超临界氮气流动与传热特性 [J]. | 化工进展 , 2023 , 42 (11) : 5592-5601 . |
| MLA | 韩昌亮 et al. "不同结构凹穴微通道内超临界氮气流动与传热特性" . | 化工进展 42 . 11 (2023) : 5592-5601 . |
| APA | 韩昌亮 , 黄峄演 , 徐建全 . 不同结构凹穴微通道内超临界氮气流动与传热特性 . | 化工进展 , 2023 , 42 (11) , 5592-5601 . |
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本实用新型属于激光加工设备技术领域，具体为一种具有微通道散热装置的激光加工设备，半导体激光器下端设有与蛇形微通道入口对应的第一连接管道，上端设有与蛇形微通道出口对应的第二连接管道，半导体激光器后端分别设有与第二连接管道相通的空气净化设备、与第一连接管道相通的液氮储存设备，第一连接管道上设有与液氮储存设备配合的电磁阀，半导体激光器后端设有排气管道，排气管道与空气净化设备之间设置有第三连接管道，且内侧壁上可拆卸连接有排气风扇，半导体激光器上端设有进气管道，进气管道与第一连接管道之间设置有第四连接管道，有益效果：在半导体激光器上端设有散热片与液氮冷却，在半导体激光器温度过高时，采用液氮进行快速冷却。
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| GB/T 7714 | 李西兵 , 杨乔楠 , 赵芳伟 et al. 一种具有微通道散热装置的激光加工设备 : CN202321255322.1[P]. | 2023-05-23 . |
| MLA | 李西兵 et al. "一种具有微通道散热装置的激光加工设备" : CN202321255322.1. | 2023-05-23 . |
| APA | 李西兵 , 杨乔楠 , 赵芳伟 , 韩昌亮 . 一种具有微通道散热装置的激光加工设备 : CN202321255322.1. | 2023-05-23 . |
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为了实现微通道换热器表面结构的高效设计,本文将数值模拟和实验手段相结合,以超临界氮气(supercritical nitrogen,SCN_(2))为流体工质,研究了不同凹穴形状(直微通道、圆形、矩形和梯形)和椭圆度对微通道流动与传热特性的影响,揭示了SCN_(2)高效低阻强化换热机理。结果表明,相比于直微通道,圆形凹穴微通道中轴线上SCN_(2)速度达到稳定值所需入口段距离更短,这是由于凹穴能够促使流体流动/热边界层一直处于破坏与重建的交替状态。圆形凹穴内流体旋涡形状与凹穴几何结构保持一致,其流阻特性和换热性能最优,梯形凹穴微通道次之,矩形凹穴微通道最差。微通道综合性能随着凹穴椭圆度增加呈先升高后降低变化趋势,当椭圆度为1时,其综合性能最优。研究结果对提高微通道换热器设计制造能力具有重要的意义。
Keyword ：
凹穴 凹穴 微通道 微通道 流动与传热 流动与传热 结构 结构 超临界氮气 超临界氮气
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| GB/T 7714 | Han, Changliang , Huang, Yiyan , Xu, Jianquan . 不同结构凹穴微通道内超临界氮气流动与传热特性 [J]. | 化工进展 , 2023 , 42 (11) : 5592-5601 . |
| MLA | Han, Changliang et al. "不同结构凹穴微通道内超临界氮气流动与传热特性" . | 化工进展 42 . 11 (2023) : 5592-5601 . |
| APA | Han, Changliang , Huang, Yiyan , Xu, Jianquan . 不同结构凹穴微通道内超临界氮气流动与传热特性 . | 化工进展 , 2023 , 42 (11) , 5592-5601 . |
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