期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
电爆管内燃烧过程数值模拟 被引量:4
1
作者 祝明水 何碧 +1 位作者 蒋小华 蒋明 《高压物理学报》 EI CAS CSCD 北大核心 2007年第2期193-198,共6页
基于内弹道两相流模型,考虑到点火药量与主装药相当及其固体燃烧产物所占比例大等影响,提出了适用于电爆管内燃烧过程的内弹道“四相流”模型,即将气态燃烧产物、固态燃烧产物、点火药和主装药分别作为一“相”参与燃烧和流动,每一“相... 基于内弹道两相流模型,考虑到点火药量与主装药相当及其固体燃烧产物所占比例大等影响,提出了适用于电爆管内燃烧过程的内弹道“四相流”模型,即将气态燃烧产物、固态燃烧产物、点火药和主装药分别作为一“相”参与燃烧和流动,每一“相”都用质量、动量和能量方程描述,而它们之间的各种相互作用以源项的形式出现在上述方程中。模型计算结果与电爆管实验结果一致,表明该模型对于电爆管内燃烧过程的描述是合理的,可以作为分析该电爆管燃烧性能的一种辅助工具。 展开更多
关键词 燃烧 电爆管 四相流
下载PDF
油水真空分离过程中气体速率对其效率的影响研究 被引量:1
2
作者 刘阁 陈彬 +1 位作者 张贤明 沈顺祥 《真空科学与技术学报》 EI CAS CSCD 北大核心 2015年第10期1231-1237,共7页
为了获取气体速率对油水分离动态特性的影响规律,考虑了油水汽气四相流、水滴蒸发相变等因素,建立了滤油机的油水分离流场的数学物理模型以及水滴运动蒸发的相变方程;分析了不同气体速率对油水分离过程中的油水气四相体积分数分布以及... 为了获取气体速率对油水分离动态特性的影响规律,考虑了油水汽气四相流、水滴蒸发相变等因素,建立了滤油机的油水分离流场的数学物理模型以及水滴运动蒸发的相变方程;分析了不同气体速率对油水分离过程中的油水气四相体积分数分布以及轴向脱水率的影响规律,表明了不同气体速率情况下油水汽气四相流的动态特性,且气体速率会显著影响油水分离的脱水效率,对深入研究滤油机的油水分离机理奠定前期基础。 展开更多
关键词 气体速率 油水分离 四相流 脱水率
下载PDF
基于TRIZ的城市快速路交通管理创新研究 被引量:1
3
作者 顾九春 王亮申 +2 位作者 王品 李元元 郭昆 《物流技术》 2010年第13期55-57,共3页
在分析总结TRIZ的基本理论体系的基础上,初步探讨了TRIZ与城市快速路交通管理创新的关系,并应用TRIZ矛盾矩阵工具解决城市快速路四相交通流状态的管理创新,最后结合创新原理提出了相关的创新解决方案。
关键词 TRIZ 快速路 交通 交通管理创新
下载PDF
COMPARISON AND EVALUATION OF CURRENT REFERENCE GENERATION STRATEGIES FOR ACTIVE POWER FILTERS IN THREE-PHASE FOUR-WIRE SYSTEMS
4
作者 陈东华 郭涛 +1 位作者 谢少军 周波 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2005年第4期298-306,共9页
For three phase four-wire active power filters (APFs), several typical power theories and corresponding current reference generation strategies are induced, p-q, d-q, unify power factor (UPF) and instantaneous act... For three phase four-wire active power filters (APFs), several typical power theories and corresponding current reference generation strategies are induced, p-q, d-q, unify power factor (UPF) and instantaneous active current (IAC) methods are analyzed and compared with each other. The interpretation of active and reactive currents in non-sinusoidal and unbalanced three-phase four-wire systems is given based on the generalized instantaneous reactive power theory. The performance and the characteristic are evaluated, and the application conditions of current reference generation strategies are concluded. Simulation results under different source voltages and loads verify the evaluation result. 展开更多
关键词 active power filters instantaneous reactive power current reference three-phase four wire power
下载PDF
Numerical analysis of reasons for the CO distribution in an opposite-wall-firing furnace
5
作者 Xiao-qiang XIE Jian-guo YANG +3 位作者 Chao-yang ZHU Chuan-huai LIU Hong ZHAO Zhi-hua WANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2020年第3期193-208,共16页
In practical operations,the carbon monoxide(CO)distribution in an opposite-wall-firing furnace(OWFF)is characterized by a high concentration near the side walls and a low concentration in the center,accompanied by a s... In practical operations,the carbon monoxide(CO)distribution in an opposite-wall-firing furnace(OWFF)is characterized by a high concentration near the side walls and a low concentration in the center,accompanied by a series of combustionrelated issues.To find the reasons for the CO distribution,a numerical study was conducted on a 660 MWe OWFF.The CO concentration profiles,distribution coefficients of coal and air,mixing coefficients,and the aerodynamic characteristics were extracted for analysis.The CO distribution within the furnace greatly depends on the mixing of coal and air.A mismatch between the aerodynamic behaviors of coal and air causes the non-uniform distribution of CO.Taking into consideration that distinctive flow patterns exist within the different regions,the formation mechanisms of the CO distribution can be divided into two components:(1)In the burner region,the collision of opposite flows leads to the migration of gas and particles toward the side wall which,together with the vortexes formed at furnace corners,is responsible for unburned particles concentrated and oxygenized from the furnace center to the side wall.Thus,high CO concentrations appear in these areas.(2)As the over-fire air(OFA)jet is injected into the furnace,it occupies the central region of furnace and pushes the gas from the burner region outward to the side wall,which is disadvantageous for the mixing effect in the side wall region.As a consequence,a U-shaped distribution of CO concentration is formed.Our results contribute to a theoretical basis for facilitating the control of variation in CO concentration within the furnace. 展开更多
关键词 Opposite-wall-firing furnace(OWFF) Carbon monoxide(CO)distribution Distributions of coal and air Gas/particle flow Corner vortex Over-fire air(OFA)
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部