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Numerical study on natural convection in a square enclosure containing a rectangular heated cylinder
Jianhua LU, Zhaoli GUO, Zhenhua CHAI, Baochang SHI,
《能源前沿(英文)》 2009年 第3卷 第4期 页码 373-380 doi: 10.1007/s11708-009-0078-x
关键词: natural convection buoyant regime heated cylinder lattice Boltzmann
A pneumatic cylinder driving polyhedron mobile mechanism
Wan DING, Sung-Chan KIM, Yan-An YAO
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 55-65 doi: 10.1007/s11465-012-0301-z
A novel pneumatic cylinder driving polyhedron mobile mechanism is proposed in this paper. The mechanism is comprised of 5 tetrahedrons which includes a pneumatic cylinder in each edge. It locomotes by rolling and the rolling principle refers to the center of mass (CM) of the mechanism moved out of the supporting area and let it tip over through the controlling of the motion sequence of these cylinders. Firstly, the mathematical model is built to analysis the relation between the configuration and the CM of the mechanism. Then, a binary control strategy is developed to simplify and improve the control of this mobile mechanism. After that, dynamic simulation is performed to testify the analytical validity and feasibility of the rolling gaits. At last, a prototype is fabricated to achieve the rolling successfully to demonstrate the proposed concept.
Xiyan GUO, Yongping YANG
《能源前沿(英文)》 2011年 第5卷 第1期 页码 69-74 doi: 10.1007/s11708-010-0117-7
关键词: thermodynamic model energy distribution boiler unsteady conditions
A numerical study of helium-heated inorganic membrane reformer coupling to HTGR
YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie
《能源前沿(英文)》 2007年 第1卷 第4期 页码 446-450 doi: 10.1007/s11708-007-0065-3
关键词: temperature gas-cooled one-dimensional quasi-homogeneous steady-state helium-heated
Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension
Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 102-110 doi: 10.1007/s11465-015-0329-y
Cylinder-crown integrated hydraulic press (CCIHP) is a new press structure. The hemispherical hydraulic cylinder also functions as a main portion of crown, which has lower weight and higher section modulus compared with the conventional hydraulic cylinder and press crown. As a result, the material strength capacity is better utilized. During the engineering design of cylinder-crown integrated structure, in order to increase the fatigue life, structural optimization on the basis of the adaptive macro genetic algorithms (AMGA) is first conducted to both reduce weight and decrease peak stress. It is shown that the magnitude of the maximum principal stress is decreased by 28.6%, and simultaneously the total weight is reduced by 4.4%. Subsequently, strain-controlled fatigue test is carried out, and the stress-strain hysteresis loops and cyclic hardening curve are obtained. Based on linear fit, the fatigue properties are calculated and used for the fatigue life prediction. It is shown that the predicted fatigue life is significantly increased from 157000 to 1070000 cycles after structural optimization. Finally, according to the optimization design, a 6300 kN CCIHP has been manufactured, and priority application has been also suggested.
关键词: cylinder-crown integrated hydraulic press (CCIHP) adaptive macro genetic algorithms (AMGA) strain-controlled fatigue test
T. G. YUDINA, Danyang GUO, N. F. PISKUNKOVA, I. B. PAVLOVA, L. L. ZAVALOVA, I. P. BASKOVA
《化学科学与工程前沿(英文)》 2012年 第6卷 第2期 页码 203-209 doi: 10.1007/s11705-012-1277-2
关键词: recombinant destabilase-lysozyme (rec.Dest-Lys) antimicrobial activity antifungal activity medicinal leech heated-up derivative of rec.Dest-Lys (T-rec.Dest-Lys)
Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow
Hongting MA , Dandan MA , Na YANG ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 289-296 doi: 10.1007/s11708-009-0019-8
关键词: air jet impinging rotating cylinder critical point mass transfer characteristics
CHEN Changfu, XIAO Shujun, YANG Yu
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 329-333 doi: 10.1007/s11709-007-0043-x
Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 318-323 doi: 10.1007/s11465-011-0232-0
The refined theory for axi-symmetric magnetoelastic circular cylinder is deduced systematically and directly from linear magnetoelasticity theory. Based on the general solution of magnetoelastic equation and the Lur’e method, the refined theory yields the solutions for magnetoelastic circular cylinder without ad hoc assumptions. On the basis of the refined theory developed in the present study, solutions are obtained for magnetoelastic circular cylinder with homogeneous and non-homogenous boundary conditions, respectively. For the circular cylinder with homogeneous boundary conditions, the refined theory provides exact solutions that satisfy all of the governing equations. The exact solutions can be divided into three parts: the 2-orders equation, the transcendental equation, and the magnetic equation. In the case of non-homogenous boundary conditions, the approximate governing equations are accurate up to the high-order terms with respect to cylinder radius.
关键词: refined analysis axially symmetric deformation circular cylinder Bessel’s function axial magnetic field
Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil
《结构与土木工程前沿(英文)》 2021年 第15卷 第4期 页码 937-947 doi: 10.1007/s11709-021-0754-4
关键词: hydraulic fracturing pressure layered cavity expansion theory triaxial fracturing test cohesive soil
Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,
《能源前沿(英文)》 2010年 第4卷 第3期 页码 392-401 doi: 10.1007/s11708-009-0066-1
关键词: heat transfer space non-uniformity soot emission in-cylinder diesel
Combustion and emissions of RP-3 jet fuel and diesel fuel in a single-cylinder diesel engine
《能源前沿(英文)》 2023年 第17卷 第5期 页码 664-677 doi: 10.1007/s11708-021-0787-3
栗元龙,陆守香,范维澄
《中国工程科学》 2004年 第6卷 第11期 页码 63-65
研究了柴油机燃料泄漏后在热壁上的着火,利用统计方法得到着火的临界温度。发现样品燃料的热壁着火温度与自燃点的差值比其它燃料热壁着火的相应值要小得多,而且着火方式也有很大差异。详细解释了泄漏后的液体在热表面上的沸腾蒸发模式,给出了燃料蒸气的质量流率推导公式。
龚进,谭青,赵喻明,衡保利
《中国工程科学》 2011年 第13卷 第3期 页码 71-76
针对现有油缸检测系统检测手段和技术落后及检测精度低等缺点,提出把测试项目模块化后,将模块有机组织在液压缸运行过程中来完成油缸检测的控制策略。运用PLC(programmable logic controller,可编程控制器)控制、CoDeSys组态软件和Visual Basic 6.0技术设计了一套油缸实时检测系统。试验结果表明,新的测试系统实现了实时检测、试验数据和曲线以及试验报告的输出和打印,提高了检测效率。
Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine
K. RAJKUMAR, P. GOVINDARAJAN
《能源前沿(英文)》 2011年 第5卷 第4期 页码 398-403 doi: 10.1007/s11708-011-0157-7
关键词: oxygen enriched combustion exhaust gas temperature brake power (BP) specific fuel consumption (SFC)
标题 作者 时间 类型 操作
Numerical study on natural convection in a square enclosure containing a rectangular heated cylinder
Jianhua LU, Zhaoli GUO, Zhenhua CHAI, Baochang SHI,
期刊论文
Thermodynamic models and energy distribution of single-phase heated surface in a boiler under unsteady
Xiyan GUO, Yongping YANG
期刊论文
A numerical study of helium-heated inorganic membrane reformer coupling to HTGR
YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie
期刊论文
Enhancing fatigue life of cylinder-crown integrated structure by optimizing dimension
Weiwei ZHANG,Xiaosong WANG,Zhongren WANG,Shijian YUAN
期刊论文
Antifungal and antibacterial functions of medicinal leech recombinant destabilase-lysozyme and its heated-up
T. G. YUDINA, Danyang GUO, N. F. PISKUNKOVA, I. B. PAVLOVA, L. L. ZAVALOVA, I. P. BASKOVA
期刊论文
Convective mass transfer from a horizontal rotating cylinder in a slot air jet flow
Hongting MA , Dandan MA , Na YANG ,
期刊论文
Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain
CHEN Changfu, XIAO Shujun, YANG Yu
期刊论文
Refined analysis of axi-symmetric circular cylinder in the axial magnetic field without ad hoc assumption
Baosheng ZHAO, Yang GAO, Yingtao ZHAO, Dechen ZHANG
期刊论文
Effect of heat transfer space non-uniformity of combustion chamber components on in-cylinder heat transfer
Jizu LV, Minli BAI, Long ZHOU, Jian ZHOU,
期刊论文