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Chinese Journal of Chemical Engineering 2021年第12期34卷 65-77页

作者： qihui hu Xiaoyu Wang Wuchang Wang Yuxing Li Shuai Liu Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of PetroleumQingdao 266580China State Key Laboratory of Natural Gas Hydrates Beijing 100028China Research Institute of Experiment and Detection Petro China Xinjiang Oilfield CompanyKaramay 834000China

To investigate the morphological evolution of the whole growth and aggregation processes of hydrate crystals near the gas–liquid interface,we used a high-pressure visual reactor with high-speed camera to capture the micromorphology of hydrate particles in a natural gas+pure water system with pressure from 2.6 to 3.6 MPa and sub-cooling from 4.7 to 6.23*** results showed that under low sub-cooling conditions,the amount and size of particles increased first and then decreased in the range of 0–330 lm,and the small particles always *** particles can be roughly classified into two categories:planar flake particles and polyhedral solid ***,the concept of maximum growth dominant particle size was proposed to distinguish the morphological boundary of growth and *** addition,the micro model was established to better reflect the effects of particle formation process and evolution mechanism near the gas–liquid interface under stirring *** results of this study can provide a guidance for flow assurance in multiphase pipeline.

关键词： Natural gas hydrate Growth Aggregation Gas-liquid interface Micromorphology Physical model

Microscopic morphology evolution of the crystal structure of tetrahydrofuran hydrate under flowing condition

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Chinese Journal of Chemical Engineering 2022年第5期35卷 103-110页

作者： Jialu Zhang Xiang Liu Shuai Liu Yuxing Li qihui hu Wuchang Wang Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety College of Pipeline and Civil EngineeringChina University of Petroleum(East China)Qingdao 266580China State Key Loboratory of Natural Gas Hydrates Beijing 100028China

The evolution of the hydrate particle structure during growth and agglomeration under flowing condition affects the particle as well as flow characteristic,which plays an important role in the flow assurance as well as heat transfer in refrigeration ***,this article conducts experiments to study and observe the growth and agglomeration process in the main forming stage of *** was found that the growth of tetrahydrofuran hydrate was anisotropic and in a layered growth *** crystals generally transformed from octahedral structure to octahedral skeleton structure with growth,however some single crystals also deformed into plate type *** thickness of the plate type particles increased gradually during growth,and the edge part increased earlier than the middle *** agglomeration,the hydrate particles contacted and sintered *** as the impurity didn’t serve as the nucleation center but affected the agglomeration of hydrate particles by *** addition,the effect increased as the sand size ***,a microstructure model for hydrate growth and agglomeration was proposed,which showed the hydrate structure evolution in these processes and could lay a foundation for studying the flow assurance of hydrate slurry.

关键词： Tetrahydrofuran hydrate Growth Agglomeration Morphology Microstructure Microstructure model

An experimental study on the choked flow characteristics of CO_(2) pipelines in various phases

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Chinese Journal of Chemical Engineering 2021年第4期34卷 17-26页

作者： Yuxing Li Shuaiwei Gu Datong Zhang qihui hu Lin Teng Cailin Wang Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation Security China University of Petroleum(East China)Qingdao 266555China Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China

High pressure pipeline transportation has been an established technology for economically transporting large amounts of CO_(2).However,there are still issues and associated risks that have to be effectively addressed and adequately *** is well known that a strong JouleThomson Cooling effect can occur when pressurized CO_(2) flows through a choke ***,to investigate the choking characteristics especially the temperature drop of high pressure CO_(2),a new laboratory scale experimental setup(total length of 14.85 m and the inner diameter of 15 mm)was *** choked flow and transient choked flow tests were carried out respectively for pressurized CO_(2) in various initial *** phase transitions and temperature drop characteristics were then studied following the choked flow and the results show that the phase transitions in steady choked flow differs significantly from that in transient choked *** transient choked flow of various initial phases,all the flows downstream would transfer from single phase to gas-liquid twophase ***,the effect of water on transient choked flow of supercritical CO_(2) pipeline was investigated,and the phenomena of solid particles deposition was captured which was paramount importance of ensuring the safety operation of CO_(2)pipelines when throttling by the choke valves.

关键词： CO^(2)pipeline Steady choked flow Transient choked flow Water Temperature drop

A Rhodamine-Based Sensor for Chromogenic Detection of Cu^(2+) and Fluorescent Detection of Fe^(3+)

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Wuhan University Journal of Natural Sciences 2014年第2期19卷 129-136页

作者： YU Xianglin QU Hao hu qihui HOU Kun YAN Yushi WU Dan ZHANG Pian LI Junbo Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of Technology

A rhodamine-benzimidazole conjugate （RB） as a probe was investigated. UV-Vis analysis showed that a strong absorption band at 552 nm was formed with the addition of Cu^2＋, while other transition metal ions induced a little more absorption. The absorption value of RB solution at 552 nm has a linear correlation with Cu^2＋ concentration between 35-70 μmol/L; the detection limit reached 6.82x 10-2 gmol/L, which is lower than the settled limitation for copper in the drinking water （-30 μmol/L） standardized by World Health Organization （WHO）. Moreover, FL analysis showed that only Fe^3＋ could induce large fluorescence intensity enhance- ment at 582 nm; other common metal ions including Cu^2＋ cannot induce the enhancement. There was a good linear correlation be Fe^3＋ tween relatwe fluorescence ntenslty and Fe concentration ranging from 2 μmol/L to 20 μmol/L, and the detection limit reached 1.70×10^-2 μmol/L. The results showed that RB could detect Cu^2＋ and Fe^3＋ simultaneously, with the UV-Vis and fluorescence spectroscopy, respectively.

关键词： rhodamine B sensor multiple analytes copper ions iron ions

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轴流式血泵黏弹性流体水动力特性数值模拟

西安交通大学学报 2010年第11期44卷 28-32页

作者：胡其会张鸣远杨万英西安交通大学能源与动力工程学院西安710049

将一种黏弹性流体k-ε模型应用于自行设计的轴流式血泵内流动特性的数值模拟,分析了轴流泵的水动力特性,得到了泵壳与转子间狭缝中以及叶轮流道内的紊动能和紊动能耗散率的分布规律.研究发现:在相同流量和转速条件下,质量分数为0.06%的... 详细信息

将一种黏弹性流体k-ε模型应用于自行设计的轴流式血泵内流动特性的数值模拟,分析了轴流泵的水动力特性,得到了泵壳与转子间狭缝中以及叶轮流道内的紊动能和紊动能耗散率的分布规律.研究发现:在相同流量和转速条件下,质量分数为0.06%的黄原胶水溶液的扬程高于以水为工质时的相应扬程,二者最大约相差35%,且计算结果与实测数据符合良好;轴流泵内黄原胶水溶液的紊动能和紊动能耗散率均显著低于水的相应值,粗略估算每千克黄原胶水溶液的机械能损失只是水的相应值的37%,表示以黏弹性流体为工质时,泵内部的黏性耗损降低,这正是黏弹性流体扬程高于水的扬程的物理原因.

关键词：黏弹性流体k-ε模型轴流式血液泵数值模拟

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广义Bézier曲线

计算机辅助设计与图形学学报 2006年第3期18卷 406-409页

作者：韩旭里胡奇辉彭丰富中南大学数学科学与计算技术学院长沙410083

为了有效地改进Bézier曲线的形状,给出了带局部形状参数的广义Bézier曲线,该曲线的表示式以一种函数的高阶逼近式为依据.通过对目标导矢和目标二阶导矢的系数的调整,生成满意的多项式曲线.所给曲线以Bézier曲线为特殊情形,能对较高次... 详细信息

为了有效地改进Bézier曲线的形状,给出了带局部形状参数的广义Bézier曲线,该曲线的表示式以一种函数的高阶逼近式为依据.通过对目标导矢和目标二阶导矢的系数的调整,生成满意的多项式曲线.所给曲线以Bézier曲线为特殊情形,能对较高次的B啨zier曲线进行有效地修改,也能方便地进行曲线段的拼接.

关键词： Bézier曲线曲线设计形状调整局部参数

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大倾角上倾管气液两相流动特性

化工进展 2017年第8期36卷 2822-2829页

作者：王权李玉星胡其会王琳刘昶中国石油大学(华东)储运与建筑工程学院山东青岛266580 山东省油气储运安全省级重点实验室山东青岛266580 西南交通大学力学与工程学院四川成都610031 北京中航油工程建设有限公司北京100012

针对地形起伏区域常见的大倾角上倾管气液两相流动问题,利用室内实验装置进行气液混输实验,对气液两相流的流型、压力波动特性进行了研究。实验中观测到6种流型,得到了不同气液流量和倾角下压力波动的时域值、概率密度函数(PDF)、累积... 详细信息

针对地形起伏区域常见的大倾角上倾管气液两相流动问题,利用室内实验装置进行气液混输实验,对气液两相流的流型、压力波动特性进行了研究。实验中观测到6种流型,得到了不同气液流量和倾角下压力波动的时域值、概率密度函数(PDF)、累积分布函数(CDF)和功率谱密度(PSD)特征。实验结果分析表明:由于气体的膨胀和段塞运动的惯性,严重段塞流气液喷发阶段时,上倾管上部会出现下部压力小于上部压力的现象;得到了不同折算气速、折算液速和倾角的压力信号并进行统计学分析;PDF呈单峰或双峰分布;不同流型的CDF的斜率、拐点和曲线位置不同;PSD图会出现一阶、二阶、三阶和多阶波峰,甚至无波峰分布;在同等气液流量下,随着倾角的增加,严重段塞流的周期和压力波动值增大;结合压力波动特性及对应分析结果可以进行流型识别并对设备的选型以及管道的安全运行提供参考。

关键词：上倾管气液混输流型压力波动概率密度函数累积分布函数功率谱密度

A Novel Design of Hydraulic Motor-vane Pump with Auxiliary Centrifugal Pump

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A Novel Design of Hydraulic Motor-vane Pump with Auxiliary C...

轴流式血泵水动力特性和生物相容性的数值模拟

第五届流体传动与控制国际会议

作者： Ji Hong Qi Qi Wang Zhengrong hu qihui School of Fluid Power & Control Engineering Lanzhou University of Technology Lanzhou.730050.China

＜正＞A new design of a hydraulic motor-pump called the hydraulic motor-vane pump is put *** consists of electric motor,vane pump and a novel centrifugal pump to improve the suction performance of the vane pump,which is a new compact hydraulic power *** has many advantages such as compact structure,low noise,high efficiency and no exterior leakage flow. In the designed structure,the rotor of electric motor and that of vane pump are skillfully integrated with a centrifugal *** on the 3D CFD analysis with FLUENT code,internal flow field of motor-vane pump is studied.A pore-plate centrifugal pump is put forward and its structure and configuration is *** this way,a hydraulic motor-vane pump with optimal oil flow was obtained. The ratio of its whole volume to that of traditional fluid power unit including an electric motor and a vane pump is 36%,so the design structure is highly integrative and obviously innovative.

关键词： motor-vane pump auxiliary centrifugal pump CFD suction performance

来源： cnki会议评论

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西安交通大学学报 2011年第8期45卷 118-122页

作者：胡其会张鸣远李景银杨万英西安交通大学能源与动力工程学院西安710049

为了准确评价自行设计的轴流式血泵的水力性能和生物相容性,将一种黏弹性流体k-ε模型应用于该血泵内紊流流动特性的数值模拟,分析了轴流泵的泵壳与转子间狭缝中以及叶轮流道内的静压和切应力的分布规律,并将溶血指标计算方法与此黏弹... 详细信息

为了准确评价自行设计的轴流式血泵的水力性能和生物相容性,将一种黏弹性流体k-ε模型应用于该血泵内紊流流动特性的数值模拟,分析了轴流泵的泵壳与转子间狭缝中以及叶轮流道内的静压和切应力的分布规律,并将溶血指标计算方法与此黏弹性紊流模型结合,计算了黏弹性流体为工质时血泵的溶血指标,并与水为工质时的计算结果进行了对比.结果表明:在相同转速和流量条件下,质量分数为0.06%的黄原胶溶液为工质时的静压压升高于以水为工质时的相应值,质量分数为39%的甘油溶液为工质时静压压升最不明显;甘油溶液的雷诺应力和黏性切应力均高于水和黄原胶溶液的相应值;黏弹性流体为工质时泵的溶血指标比水和甘油溶液的低,且数值处于同一数量级上.该模型能较为准确地预测血泵内黏弹性流体的紊流流动特性,但血泵的结构需进一步优化和改善.

关键词：黏弹性流体k-ε模型轴流式血泵数值模拟溶血指标

一种新型板翅式换热器气液分配器分配特性的敏感性分析

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化工学报 2013年第6期64卷 2007-2014页

作者：李焱李玉星胡其会王武昌谢彬喻西崇中国石油大学(华东)储运与建筑工程学院山东青岛266580 中海石油研究总院北京100149

两相流动分配不均是影响板翅式换热器换热效率的主要因素。传统的'先混合,后分配'方法不能解决在导流翅片中流向突变时气液分离引起的气液两相流体分配不均问题,因此采用'先分配,后混合'的理念提出了一种新型的气液分配器,气体和液体分... 详细信息

两相流动分配不均是影响板翅式换热器换热效率的主要因素。传统的'先混合,后分配'方法不能解决在导流翅片中流向突变时气液分离引起的气液两相流体分配不均问题,因此采用'先分配,后混合'的理念提出了一种新型的气液分配器,气体和液体分别从各自的通道进入分配器,在分配器内均匀混合后进入换热器的翅片换热通道进行换热。通过对分配器内部流场的数值模拟,发现:分配器的气液分配不均匀度随流量的增加而增加,且不均匀度受液相流量的影响比气相大。该气液分配器的气液分配不均匀度相比传统封头结构降低了一个数量级,能够有效改善板翅式换热器层间通道的气液分配特性,提高板翅式换热器的换热效率。

关键词：板翅式换热器气液分配器流量分配分配不均数值模拟