期刊文献+

二次检索

题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到148篇文章
< 1 2 8 >
每页显示 20 50 100
A control volume based finite element method for simulating incompressible two-phase flow in heterogeneous porous media and its application to reservoir engineering 被引量:3
1
作者 SADRNEJAD S A GHASEMZADEH H +1 位作者 GHOREISHIAN AMIRI S A MONTAZERI G H 《Petroleum Science》 SCIE CAS CSCD 2012年第4期485-497,共13页
Applying the standard Galerkin finite element method for solving flow problems in porous media encounters some difficulties such as numerical oscillation at the shock front and discontinuity of the velocity field on e... Applying the standard Galerkin finite element method for solving flow problems in porous media encounters some difficulties such as numerical oscillation at the shock front and discontinuity of the velocity field on element faces.Discontinuity of velocity field leads this method not to conserve mass locally.Moreover,the accuracy and stability of a solution is highly affected by a non-conservative method.In this paper,a three dimensional control volume finite element method is developed for twophase fluid flow simulation which overcomes the deficiency of the standard finite element method,and attains high-orders of accuracy at a reasonable computational cost.Moreover,this method is capable of handling heterogeneity in a very rational way.A fully implicit scheme is applied to temporal discretization of the governing equations to achieve an unconditionally stable solution.The accuracy and efficiency of the method are verified by simulating some waterflooding experiments.Some representative examples are presented to illustrate the capability of the method to simulate two-phase fluid flow in heterogeneous porous media. 展开更多
关键词 Finite element method control volume two-phase flow HETEROGENEITY porous media WATERFLOODING
下载PDF
Numerical Simulation and Control of Two-Phase Flow with Evaporation in a Vertical Tube Submitted to a Conjugate Heat Transfer 被引量:2
2
作者 Ghazali Mebarki Samir Rahal 《Journal of Energy and Power Engineering》 2013年第7期1282-1292,共11页
A better understanding of two-phase flows with evaporation allows leading to an optimal design of evaporators. For that purpose, numerical simulations are very useful. In this paper, a numerical study has been carried... A better understanding of two-phase flows with evaporation allows leading to an optimal design of evaporators. For that purpose, numerical simulations are very useful. In this paper, a numerical study has been carried out in order to model and simulate the combination of a two-phase flow with evaporation in a vertical tube. The VOF (volume-of-fluid) multiphase flow method and a phase-change model for the mass transfer have been used. For an accurate modeling, the effect of axial conduction has been also taken into account using a conjugate heat transfer model. Since thermal oscillations are undesirable as they can lead to the failure of the tube, flow instabilities have also been analyzed, using FFT (fast Fourier transforms), in order to comprehend their behavior and influence. A control study of the flow instabilities in the tube is also presented. For that purpose tube inlet temperature has been varied using a gain control parameter. 展开更多
关键词 Two-phase flow EVAPORATION VOF method conjugate heat transfer flow instabilities control of instabilities.
下载PDF
Branch Quality Control of Gas-Liquid Two-Phase Flow Using a Novel T-Junction Type Distributor
3
作者 Fa-Chun Liang Jing Chen +1 位作者 Jin-Long Wang Hao Yu 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2014年第4期110-115,共6页
In order to eliminate mal-distribution and ensure the side arm to produce desirable gas quality a special distributor is proposed. The experimental distributor mainly consists of a straight through section,a gas extra... In order to eliminate mal-distribution and ensure the side arm to produce desirable gas quality a special distributor is proposed. The experimental distributor mainly consists of a straight through section,a gas extraction line,a liquid extraction line and a side arm branch. A gas orifice and a liquid orifice are mounted at the gas and liquid extraction line respectively to control the outlet gas quality. The diameter of the liquid orifice was set to 2. 50 mm and three gas orifices with different size( dG= 2. 65,5. 00,10. 00 mm) were tested. The experiments were carried out at an air-water two-phase flow loop. The gas superficial velocity ranged from 6. 0 to 20. 0 m /s and the liquid superficial velocity was in the range of 0. 02- 0. 18 m /s. Flow patterns such as wave flow,slug flow and annular flow were observed. The gas quality of the side arm branch was found mainly determined by the flow area ratio of the gas orifice to the liquid orifice and independent of gas and liquid superficial velocity,flow patterns and extraction flux. 展开更多
关键词 gas-liquid two-phase flow DISTRIBUTOR phase splitting flow pattern quality control
下载PDF
Experimental analysis on adjusting performance of vapor-liquid two-phase flow controller
4
作者 李慧君 屠珊 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第5期525-530,共6页
The vapor-liquid self-adjusting controller is an innovative automatic regulating valve.In order to ensure adjusted objects run safely and economically,the controller automatically adjusts the liquid flux to keep liqui... The vapor-liquid self-adjusting controller is an innovative automatic regulating valve.In order to ensure adjusted objects run safely and economically,the controller automatically adjusts the liquid flux to keep liquid level at a required level according to physical properties of vapor-liquid two-phase fluid.The adjusting mechanics,the controller’s performance and influencing factors of its stability have been analyzed in this paper.The theoretical analysis and successful applications have demonstrated this controller can keep the liquid level steady with good performance.The actual application in industry has shown that the controller can satisfactorily meet the requirement of industrial production and has wide application areas. 展开更多
关键词 vapor-liquid two-phase flow adjusting performance liquid level controller
下载PDF
Green microfluidics in microchemical engineering for carbon neutrality 被引量:2
5
作者 Qingming Ma Jianhong Xu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第1期332-345,共14页
The concept of“carbon neutrality”poses a huge challenge for chemical engineering and brings great opportunities for boosting the development of novel technologies to realize carbon offsetting and reduce carbon emiss... The concept of“carbon neutrality”poses a huge challenge for chemical engineering and brings great opportunities for boosting the development of novel technologies to realize carbon offsetting and reduce carbon emissions.Developing high-efficient,low-cost,energy-efficient and eco-friendly microfluidicbased microchemical engineering is of great significance.Such kind of“green microfluidics”can reduce carbon emissions from the source of raw materials and facilitate controllable and intensified microchemical engineering processes,which represents the new power for the transformation and upgrading of chemical engineering industry.Here,a brief review of green microfluidics for achieving carbon neutral microchemical engineering is presented,with specific discussions about the characteristics and feasibility of applying green microfluidics in realizing carbon neutrality.Development of green microfluidic systems are categorized and reviewed,including the construction of microfluidic devices by bio-based substrate materials and by low carbon fabrication methods,and the use of more biocompatible and nondestructive fluidic systems such as aqueous two-phase systems(ATPSs).Moreover,low carbon applications benefit from green microfluidics are summarized,ranging from separation and purification of biomolecules,high-throughput screening of chemicals and drugs,rapid and cost-effective detections,to synthesis of fine chemicals and novel materials.Finally,challenges and perspectives for further advancing green microfluidics in microchemical engineering for carbon neutrality are proposed and discussed. 展开更多
关键词 Microchemical engineering Carbon neutrality MICROFLUIDICS Aqueous two-phase systems(ATPSs) ENVIRONMENT Chemical processes
下载PDF
PRESSURE FORCE CONTROL FOR FABRICATION OF PLASTIC MICROFLUIDIC CHIPS WITH HOT EMBOSSING METHOD
6
作者 LIU Chong LIAO Junfeng +1 位作者 WANG Xiaodong WANG Liding 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2007年第1期107-110,共4页
A pressure force control system for hot embossing of microfluidic chips is designed with a moment motor and a ball bearing lead screw. Based on the numeric PID technique, the algorithm of pulsant integral accelerated ... A pressure force control system for hot embossing of microfluidic chips is designed with a moment motor and a ball bearing lead screw. Based on the numeric PID technique, the algorithm of pulsant integral accelerated PID control is presented and the negative effects of nonlinearity from friction, clearance and saturation are eliminated. In order to improve the quick-resixmse characteristic, independent thread technique is adopted. The method of pressure force control based on pulsant integral accelerated PID control and independent thread technique is applied with satisfactory control performance. 展开更多
关键词 Microfluidic chip Hot embossing Pressure force control Nonlinearity
下载PDF
纳米材料中的界面现象
7
作者 阮文娟 李悦 郭东升 《大学化学》 CAS 2024年第1期80-86,共7页
在课程教学中融入科学前沿实例不仅可以阐明所学基本原理的实际意义,还可以为基本原理的灵活应用提供范例,启发学生独立思考能力。界面化学是物理化学课程中的重要学习内容,但由于在常规尺度的多相体系中界面现象并不显著,学生对该部分... 在课程教学中融入科学前沿实例不仅可以阐明所学基本原理的实际意义,还可以为基本原理的灵活应用提供范例,启发学生独立思考能力。界面化学是物理化学课程中的重要学习内容,但由于在常规尺度的多相体系中界面现象并不显著,学生对该部分知识常有忽视。近年来纳米材料已成为国内外研究的热点。纳米材料由于其高界面分子比例而表现出更为显著的界面现象。将界面化学的基本原理应用于纳米材料的研究中,已取得了一系列令人瞩目的成果。本文首先对附加压力、接触角等相关界面现象的基本原理进行梳理,然后分别介绍根据这些基本原理所发展出的分子马达、光控微流控器件、液体门控技术以及超疏水表面四项科技突破。 展开更多
关键词 界面现象 分子马达 光控微流控器件 液体门控技术 超疏水表面
下载PDF
Crystal phase control and ignition properties of HNS/CL-20 composite microspheres prepared by microfluidics combined with emulsification techniques 被引量:3
8
作者 Yi Liu Yunyan Guo +6 位作者 Rui Zhu Jinqiang Zhou Zhengxu Lin Kai Han Chongwei An Jingyu Wang Bidong Wu 《Particuology》 SCIE EI CAS CSCD 2024年第2期241-251,共11页
Improved controllability and energy density of ignition agents are of great significance for the devel-opment of energetic composite materials.In this study,droplet microfluidics and emulsification tech-niques were co... Improved controllability and energy density of ignition agents are of great significance for the devel-opment of energetic composite materials.In this study,droplet microfluidics and emulsification tech-niques were combined to prepare HNS/CL-20 composite microspheres with polyglycidyl azide polymer(GAP)as the binder.The influence of binder content on the morphology of microspheres was investi-gated,and the microspheres were characterized and tested for particle size,crystal structure,thermal decomposition,dispersibility,mechanical sensitivity,combustion behavior and detonation performance.The results showed that microspheres prepared with a binder content of 3%had higher sphericity and particle size uniformity.The microspheres retained the crystal structure of both HNS and CL-20(ε-type).Compared with raw HNS,the microspheres had higher apparent activation energy,better safety per-formance,and good dispersibility.The ignition experiments and detonation performance tests show that HNS/CL-20 composite microspheres have excellent ignition performance,obvious combustion flame,and significant energy release effects,which are expected to achieve high energy and high-speed response of the igniter,thus improving the ignition reliability in special environments or systems. 展开更多
关键词 Droplet microfluidics Emulsification technology Energetic materials Composite microspheres Crystal phase control IGNITION
原文传递
超细HMX的微流体结晶调控及高通量制备
9
作者 姜菡雨 徐司雨 +3 位作者 于谨 刘博 赵双飞 王煊军 《火炸药学报》 EI CAS CSCD 北大核心 2024年第6期498-505,I0002,共9页
为了实现含能材料晶体微观结构的精确控制,提升超细含能材料的晶体品质和质量一致性,以HMX为研究对象,搭建微流体结晶平台,研究在微尺度条件下流体的流动特性,开展浓度、流量等反应参数条件对超细HMX晶体颗粒形态的影响研究,并进行了超... 为了实现含能材料晶体微观结构的精确控制,提升超细含能材料的晶体品质和质量一致性,以HMX为研究对象,搭建微流体结晶平台,研究在微尺度条件下流体的流动特性,开展浓度、流量等反应参数条件对超细HMX晶体颗粒形态的影响研究,并进行了超细奥克托今(HMX)的批量制备探索。结果表明,与心型芯片相比,涡流型芯片具有更好的传质效果和更薄的边界层效应,更适合于脆性晶体的制备。DMSO作为溶剂时,HMX晶体具有较好的形貌,大小均一,球形度高;当流量比R分别为1、5、10时,HMX的平均粒径分别为8.86、4.14和0.86μm,随着R增大,HMX的粒径逐渐变小,粒径分布变窄;通过改变工艺参数,微流体结晶可实现不同形貌、粒径超细HMX的可控制备;利用多层组合与并联分流的方式,实现了超细HMX的高通量制备,该方法不仅混合效率差异小、产品处理量大且设备整体能耗低,可为高品质窄粒径范围微纳米含能材料的高通量制备提供思路。 展开更多
关键词 物理化学 微流体技术 超细HMX 流体模拟 结晶调控 高通量制备
下载PDF
拉曼光谱用于细菌快速药敏检测的研究进展
10
作者 杨文旭 张心宇 +1 位作者 刘旭(综述) 刘禹(审校) 《检验医学与临床》 2024年第4期542-546,567,共6页
致病菌对人类健康构成重大威胁,抗菌药物的滥用导致了细菌耐药性的发展和传播。目前,临床微生物室常用的药敏试验,如纸片扩散法、浓度梯度纸条扩散法、肉汤稀释法和全自动药敏分析等都是基于细菌生长的方法,且操作流程繁琐,需要8~16 h... 致病菌对人类健康构成重大威胁,抗菌药物的滥用导致了细菌耐药性的发展和传播。目前,临床微生物室常用的药敏试验,如纸片扩散法、浓度梯度纸条扩散法、肉汤稀释法和全自动药敏分析等都是基于细菌生长的方法,且操作流程繁琐,需要8~16 h才能出结果。该文从快速药敏检测(RAST)的研究出发,重点叙述了拉曼光谱在RAST领域的研究进展。利用拉曼光谱对细菌进行基于代谢表型的药敏检测,检测时间明显缩短,优于常规基于细菌生长的药敏方法。但该方法缺少大规模的临床分离株验证,而且难以实现临床标本中细菌的免分离检测。该文对RAST技术的临床验证、可重复性评估、临床适用性评估、准确性评估、拉曼光谱与电阻抗及微流控技术的创新结合及其在复杂临床标本中直接药敏检测等方面进行展望。 展开更多
关键词 拉曼光谱 快速药敏检测 细菌 光学 微流控
下载PDF
藻细胞显微成像中微流控自动进样分段控制方法
11
作者 陈志浩 赵南京 +4 位作者 殷高方 马明俊 董鸣 华卉 丁志超 《大气与环境光学学报》 CAS CSCD 2024年第1期38-46,共9页
藻细胞显微图像快速自动获取具有重要的应用价值。针对微流控-显微成像技术中样品进样效率与细胞成像质量问题,研究了基于藻细胞通过荧光检测窗口持续时间的样品平均流速检测方法,并提出基于体积流量调节的微流控自动进样分段控制方法... 藻细胞显微图像快速自动获取具有重要的应用价值。针对微流控-显微成像技术中样品进样效率与细胞成像质量问题,研究了基于藻细胞通过荧光检测窗口持续时间的样品平均流速检测方法,并提出基于体积流量调节的微流控自动进样分段控制方法。结果表明,进样速度在10~30μL/min范围内,样品平均流速检测误差小于5%;分段控制实现了藻细胞显微图像的高质量自动获取,与显微镜检成像质量基本一致,且样品进样速度提升68%以上。研究结果为藻细胞显微图像高效自动获取提供了有效实用方法。 展开更多
关键词 藻细胞 微流控-显微成像 流速检测 分段控制 自动进样
下载PDF
基于嵌入式ARM的微流控PCR检测系统设计
12
作者 张帅 胡志刚 +3 位作者 杜喆 祖向阳 王新征 马蓓蓓 《传感器与微系统》 CSCD 北大核心 2024年第1期76-79,83,共5页
为了实现微流控设备功能的集成化、提高交互系统的可操作性,提出一种基于嵌入式ARM的微流控聚合酶链式反应(PCR)控制系统及上位机软件的设计方案。系统硬件采用多个嵌入式ARM控制器与功能模块相互协调,制定可扩展的通信机制和协议,实现... 为了实现微流控设备功能的集成化、提高交互系统的可操作性,提出一种基于嵌入式ARM的微流控聚合酶链式反应(PCR)控制系统及上位机软件的设计方案。系统硬件采用多个嵌入式ARM控制器与功能模块相互协调,制定可扩展的通信机制和协议,实现微流控PCR检测过程中的流路运动、温度控制、荧光信号采集等功能的集成控制。采用Qt结合SQLite数据库设计了上位机软件,利用多线程和节点映射,实现对硬件模块的协调控制以及检测信息存储。实验表明:该系统运行稳定,人机交互效果好,可操作性高,满足微流控PCR的集成功能需求。 展开更多
关键词 嵌入式ARM 微流控聚合酶链式反应 控制系统 上位机软件 Qt软件
下载PDF
基于混合离散粒子群优化的控制模式分配算法
13
作者 曾裕钦 蔡华洋 +3 位作者 周茹平 刘耿耿 黄兴 徐宁 《电子学报》 EI CAS CSCD 北大核心 2024年第8期2836-2849,共14页
连续微流控生物芯片是生物化学实验自动化、微型化的革命性技术.多路复用器的控制模式分配作为连续微流控生物芯片自动化设计的关键环节之一,是难的NP(Non-deterministic Polynomial)优化问题.现有工作采用粒子群优化算法求解控制模式... 连续微流控生物芯片是生物化学实验自动化、微型化的革命性技术.多路复用器的控制模式分配作为连续微流控生物芯片自动化设计的关键环节之一,是难的NP(Non-deterministic Polynomial)优化问题.现有工作采用粒子群优化算法求解控制模式分配问题存在过早陷入局部最优解、收敛速度慢以及算法稳定性差的缺点.为此,本文提出一种连续微流控生物芯片下基于混合离散粒子群优化的控制模式分配算法.首先,为了加快算法收敛速度及避免过早陷入局部最优解,提出了离散的自适应区域搜索策略.其次,通过基于样例的社会学习机制提高了算法的稳定性.然后,采用等距抽值的方式筛选出自适应区域搜索策略中重要参数的最佳组合,以进一步提高分配方案的质量.最终实验结果表明,所提算法在多路复用器中阀门使用数量上平均优化了19.01%,在算法稳定性上提高了29.18%,且在现实的生化应用中有良好的性能表现. 展开更多
关键词 连续微流控生物芯片 控制模式分配 离散粒子群优化 样例学习 自适应区域搜索
下载PDF
一种基于液态金属微流控的极化可重构天线
14
作者 谭譞 陈昌明 +1 位作者 邓敏 杨保盛 《电子器件》 CAS 2024年第5期1181-1185,共5页
提出了一种基于液态金属(LM)微流控的极化可重构天线。天线由一层FR-4印刷电路板和刻蚀在辐射贴片表面的四个微流通道组成,控制微流通道中的液态金属,可以实现右旋圆极化(RHCP)、左旋圆极化(LHCP)以及线极化(LP)三种极化状态转换。测量... 提出了一种基于液态金属(LM)微流控的极化可重构天线。天线由一层FR-4印刷电路板和刻蚀在辐射贴片表面的四个微流通道组成,控制微流通道中的液态金属,可以实现右旋圆极化(RHCP)、左旋圆极化(LHCP)以及线极化(LP)三种极化状态转换。测量结果表明,线极化状态下工作频带内最大增益可达到8.5 dBi,极化转换时增益波动低于2.1 dB。三种极化状态下的重合-10 dB相对阻抗带宽为41.56%(6.9 GHz~10.35 GHz),圆极化状态下3 dB重合轴比带宽为4.7%(8.13 GHz~8.52 GHz)。测量和仿真结果吻合较好,证明了设计方法的有效性。 展开更多
关键词 极化重构 微流控 液态金属
下载PDF
膜阀微流道液流脉动消减性能
15
作者 刘旭玲 薄乐 +3 位作者 张钰松 刘威 张开贻 邵景干 《液压与气动》 北大核心 2024年第7期79-85,共7页
提出一种采用片上膜阀对微流控芯片液体微流道内液流脉动进行主动消减的方法。以阀腔蓄能器和阀腔阻尼孔为研究对象,采用ANSYS Fluent UDF自定义仿真方法,开展膜阀微流道内液流脉动消减特性研究。研究表明:不同结构消减元件消减作用不同... 提出一种采用片上膜阀对微流控芯片液体微流道内液流脉动进行主动消减的方法。以阀腔蓄能器和阀腔阻尼孔为研究对象,采用ANSYS Fluent UDF自定义仿真方法,开展膜阀微流道内液流脉动消减特性研究。研究表明:不同结构消减元件消减作用不同,不同膜阀数量的消减效果不同。根据脉动消减元件的工作原理,开展了液流脉动消减试验,试验表明,膜阀对微流道内液流脉动的主动消减方法是有效的,验证了基于膜阀微流道内液流消减元件的合理性、理论模型的正确性和具体应用的可实施性,为微量液流流量精确控制技术提供理论指导和技术支持。 展开更多
关键词 微流控芯片 片上膜阀 复合控制 脉动消减 出口流量
下载PDF
基于MEMS工艺的压电微泵的研究进展
16
作者 李以贵 王一 《应用技术学报》 2024年第1期123-132,共10页
在微纳米尺度流体控制的应用中,压电微泵因其简易结构,高精密度,高力密度,快速响应与良好环境适性成为研究的热点。从致动原理与流体控制方案角度对压电微泵的研究现状进行了归纳总结,介绍了其在药物供给、细胞分离、微量化学检测等领... 在微纳米尺度流体控制的应用中,压电微泵因其简易结构,高精密度,高力密度,快速响应与良好环境适性成为研究的热点。从致动原理与流体控制方案角度对压电微泵的研究现状进行了归纳总结,介绍了其在药物供给、细胞分离、微量化学检测等领域的应用,指出了压电微泵输出功率较小、输出具有蠕变特性、成本偏高等问题,并对压电微泵的发展方向进行了展望。 展开更多
关键词 压电微泵 致动原理 流体控制方案 腔室
下载PDF
Optimization of Holding Temperature and Holding Thickness for Controlled Rolling on Plate Mill 被引量:3
17
作者 HU Xian-lei ZHAO Zhong WANG Jun WANG Zhao-dong LIU Xiang-hua WANG Guo-dong 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第3期21-25,共5页
Holding temperature and holding thickness are main parameters for two-phase controlled rolling on plate mill. The optimization of holding temperature and holding thickness for pass schedule calculation of two-phase co... Holding temperature and holding thickness are main parameters for two-phase controlled rolling on plate mill. The optimization of holding temperature and holding thickness for pass schedule calculation of two-phase controlled rolling on plate mill was presented and its feature is as follows: (1) Determination of holding thickness can be automatically obtained based on the influence of mill safety limits, tracking zone length and holding time on holding thickness; (2) Determination of holding temperature can be automatically obtained and the holding time can be reduced as much as possible; (3) Algorithm can modify the holding temperature and thickness depending on slab size and product size. 展开更多
关键词 PLATE two-phase controlled rolling pass schedule holding temperature holding thickness
下载PDF
Optimizing Two-Phase Flow Heat Transfer:DCS Hybrid Modeling and Automation in Coal-Fired Power Plant Boilers
18
作者 Ming Yan Caijiang Lu +3 位作者 Pan Shi Meiling Zhang Jiawei Zhang Liang Wang 《Frontiers in Heat and Mass Transfer》 EI 2024年第2期615-631,共17页
In response to escalating challenges in energy conservation and emission reduction,this study delves into the complexities of heat transfer in two-phase flows and adjustments to combustion processes within coal-fired ... In response to escalating challenges in energy conservation and emission reduction,this study delves into the complexities of heat transfer in two-phase flows and adjustments to combustion processes within coal-fired boilers.Utilizing a fusion of hybrid modeling and automation technologies,we develop soft measurement models for key combustion parameters,such as the net calorific value of coal,flue gas oxygen content,and fly ash carbon content,within theDistributedControl System(DCS).Validated with performance test data,thesemodels exhibit controlled root mean square error(RMSE)and maximum absolute error(MAXE)values,both within the range of 0.203.Integrated into their respective automatic control systems,thesemodels optimize two-phase flow heat transfer,finetune combustion conditions,and mitigate incomplete combustion.Furthermore,this paper conducts an in-depth exploration of the generationmechanismof nitrogen oxides(NOx)and low oxygen emission reduction technology in coal-fired boilers,demonstrating a substantial reduction in furnace exit NOx generation by 30%to 40%and the power supply coal consumption decreased by 1.62 g/(kW h).The research outcomes highlight the model’s rapid responsiveness,enabling prompt reflection of transient variations in various economic indicator parameters.This provides a more effective means for real-time monitoring of crucial variables in coal-fired boilers and facilitates timely combustion adjustments,underscoring notable achievements in boiler combustion.The research not only provides valuable and practical insights into the intricacies of two-phase flow heat transfer and heat exchange but also establishes a pioneering methodology for tackling industry challenges. 展开更多
关键词 Two-phase flow coal-fired boiler oxygen content of flue gas carbon content in fly ash hybrid modeling automation control
下载PDF
微反应器在含能材料合成与品质提升中的应用 被引量:2
19
作者 刘卫孝 刘洋 +2 位作者 高福磊 汪伟 汪营磊 《化工进展》 EI CAS CSCD 北大核心 2023年第7期3349-3364,共16页
含能材料是一类含有爆炸性基团或含有氧化剂和可燃物、能独立进行化学反应并输出能量的化合物或混合物。由于含能材料的特殊性,其合成过程具有强烈放热、对温度敏感的特点,同时,在实际应用中武器装药对含能材料的粒度控制也有很高的要... 含能材料是一类含有爆炸性基团或含有氧化剂和可燃物、能独立进行化学反应并输出能量的化合物或混合物。由于含能材料的特殊性,其合成过程具有强烈放热、对温度敏感的特点,同时,在实际应用中武器装药对含能材料的粒度控制也有很高的要求。微反应器具有传热传质效率高、安全性高、设备微型化和集成化、环境污染小等优点,十分适合于含能材料的合成过程与粒度控制,近年来成为国内外含能材料领域研究的热点与重点之一。本文第一部分介绍了硝酸酯、硝基、叠氮、氮杂环四类含能化合物的微反应合成,点明了微反应器可以显著提高合成安全性、加快合成效率和安全性;第二部分总结了微化工技术在含能材料微纳米化、球形化以及复合含能材料制备方面的应用,发现了微反应器具有粒度控制更精确、球形度高等特点。最后指出了微反应器在含能材料领域具有广阔的应用潜力,并对未来研究的重点及改进方向进行了展望。 展开更多
关键词 微反应器 微流控技术 含能材料 粒度控制 微纳米化 球形化
下载PDF
基于微流控技术的裂缝性碳酸盐岩油藏脱气后水窜治理实验研究 被引量:3
20
作者 王勇 姜汉桥 +3 位作者 郭晨 赵旭东 第五鹏祥 李俊键 《中国海上油气》 CAS CSCD 北大核心 2023年第1期78-88,共11页
基于微流控技术,针对低压裂缝孔隙型碳酸盐岩油藏,设计了孔洞型和裂缝型两种微流控模型,在考虑前期衰竭式开发的条件下,开展了注气模拟脱气原油、注水、注药剂治理水窜等一系列微流控实验,基于水溶性化学剂组分追踪技术和微观剩余油量... 基于微流控技术,针对低压裂缝孔隙型碳酸盐岩油藏,设计了孔洞型和裂缝型两种微流控模型,在考虑前期衰竭式开发的条件下,开展了注气模拟脱气原油、注水、注药剂治理水窜等一系列微流控实验,基于水溶性化学剂组分追踪技术和微观剩余油量化分析技术,分析了衰竭式开发脱气后不同类型储层的注水开发效果及水窜后治理对策。实验结果表明,由于非连续相气体的存在导致原油流动阻力增加,使得孔洞型储层脱气后采出程度有明显降低;对于裂缝性储层而言,与井底相连的开放性裂缝内部由于压力更低,使得脱气程度更大,孔隙及裂缝中脱出的气体在裂缝中形成了连续气相,而非裂缝区域与孔洞型储层较为相似。不同类型储层水窜治理的微流控实验表明:对于孔洞型储层,可采用微球+润湿性调节剂组合调驱,对于裂缝型储层,可采用聚合物凝胶驱,针对不同储层类型所实施的水窜治理均能够有效改善储层的波及系数,提高其采出程度。将其应用于现场,效果良好,对应的水窜治理方法对裂缝性碳酸盐岩油藏开发具有指导和借鉴意义。 展开更多
关键词 微流控技术 脱气油藏 裂缝性油藏 水窜治理
下载PDF
上一页 1 2 8 下一页 到第
使用帮助 返回顶部