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Impact analysis of compressor rotor blades of an aircraft engine
Y B SUDHIR SASTRY, B G KIROS, F HAILU, P R BUDARAPU
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 505-514 doi: 10.1007/s11709-018-0493-3
关键词: axial flow compressor rotor and stator blades aircraft engine stress and impact analysis aluminum alloys
Optimization model for rotor blades of horizontal axis wind turbines
LIU Xiong, CHEN Yan, YE Zhiquan
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 483-488 doi: 10.1007/s11465-007-0084-9
关键词: population extended algorithm developed optimization accurate
Abderrahim ALLAL,Boukhemis CHETATE
《能源前沿(英文)》 2016年 第10卷 第2期 页码 176-191 doi: 10.1007/s11708-015-0386-2
关键词: induction motor incipient broken bar extended Park’s vector approach spectral analysis inter-turn short-circuit Hilbert transform
Lin Yang, Wenpeng Li, Junheng Guo, Wei Li, Baoguo Wang, Minqing Zhang, Jinli Zhang
《化学科学与工程前沿(英文)》 2021年 第15卷 第2期 页码 384-398 doi: 10.1007/s11705-020-1928-7
关键词: jet-flow high shear mixer solid particle dissolution power consumption characteristics CFD Simulation
陈矛章,彭波
《中国工程科学》 2000年 第2卷 第2期 页码 15-23
本课题组发展了一种扰动涡方法,用以研究叶轮机内动、静叶相互作用[1,2]。其优点是物理图画清楚,计算收敛快。它采用了一个重要假设:扰动胀量为零,从而大大简化 了计算过程。文章的目的是研究此假设的影响,并取消此假设,使扰动涡方法建立在完全严格的数学基础上。由于取消了“扰动胀量为零的假设,需要耦合求解扰动质量方程、扰动涡量输运方程和扰动能量输运方程。这是文章与文献[1,2]的主要区别。
文献[1,2]对NASA67压气机第一级内由于动、静叶间的相互作用引起的非定常流动过程作了数值模拟,并与试验结果作了对比。文章也作了同样的算例,以研究扰动胀量为零的影响。数值模拟结果表明,在引入了扰动胀量后,用扰动涡方法模拟动静干涉仍保持较好的收敛性和收敛速度,且与试验的符合程度更好。文章强调指出,即使对于非定常可压流,为满足无渗透边界条件所需的运动分量也是用椭圆类的拉普拉斯方程描述,而不是用双曲类的方程描述。“扰动胀童为零”不能等同于扰动运动为不可压。
Condition monitoring of a wind turbine generator using a standalone wind turbine emulator
Himani,Ratna DAHIYA
《能源前沿(英文)》 2016年 第10卷 第3期 页码 286-297 doi: 10.1007/s11708-016-0419-5
关键词: condition monitoring (CM) wind turbine emulator (WTE) wind turbine generator (WTG) maximum power point tracking (MPPT) tip speed ratio (TSR) rotor faults stator faults
Shulei YAO, Xian CAO, Shuang LIU, Kaiming ZHANG, Xiancheng ZHANG, Congyang GONG, Chengcheng ZHANG
《机械工程前沿(英文)》 2020年 第15卷 第2期 页码 240-255 doi: 10.1007/s11465-019-0581-7
关键词: aeroengine blades on-machine noncontact measurement point cloud processing path planning surface strengthening
Novel casting processes for single-crystal turbine blades of superalloys
Dexin MA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 3-16 doi: 10.1007/s11465-018-0475-0
This paper presents a brief review of the current casting techniques for single-crystal (SC) blades, as well as an analysis of the solidification process in complex turbine blades. A series of novel casting methods based on the Bridgman process were presented to illustrate the development in the production of SC blades from superalloys. The grain continuator and the heat conductor techniques were developed to remove geometry-related grain defects. In these techniques, the heat barrier that hinders lateral SC growth from the blade airfoil into the extremities of the platform is minimized. The parallel heating and cooling system was developed to achieve symmetric thermal conditions for SC solidification in blade clusters, thus considerably decreasing the negative shadow effect and its related defects in the current Bridgman process. The dipping and heaving technique, in which thin-shell molds are utilized, was developed to enable the establishment of a high temperature gradient for SC growth and the freckle-free solidification of superalloy castings. Moreover, by applying the targeted cooling and heating technique, a novel concept for the three-dimensional and precise control of SC growth, a proper thermal arrangement may be dynamically established for the microscopic control of SC growth in the critical areas of large industrial gas turbine blades.
关键词: superalloy investment casting Bridgman process directional solidification single crystal turbine blade
Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM
《能源前沿(英文)》 2016年 第10卷 第4期 页码 382-392 doi: 10.1007/s11708-016-0421-y
Le CHEN, Xianlin WANG, Hua ZHANG, Xugang ZHANG, Binbin DAN
《机械工程前沿(英文)》 2019年 第14卷 第4期 页码 412-421 doi: 10.1007/s11465-019-0551-0
关键词: predecisional remanufacturing reliability least squares support vector regression (LS-SVR) game theory
Stability and dynamics of rotor system with 45° slant crack on shaft
Yanli LIN, Xiaohui SI, Fulei CHU
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 203-213 doi: 10.1007/s11465-011-0131-4
Crack on a shaft is one of the common damages in a rotor system. In this paper, transverse vibrations are calculated to compare the influences of transverse crack and slant crack on the rotor system. Results show that the vibration amplitude of the rotor system with a 45° slant crack on the shaft is larger than that with a transverse crack when the two types of crack have the same depth and the rotor system runs in the same condition. Stability and dynamic characteristics of the rotor system with a 45° slant crack on the shaft under torsional excitation are analyzed by considering opening and closing of the crack. It is shown that the instability of the transverse vibration of the rotor system increases with increasing difference between the bending stiffness in two main directions, and the vibration is stable when the two bending stiffness are identical. The spectrum analysis of the steady-state response reveals that the gravity and the eccentricity produce different frequency components, and when the two bending stiffness are identical, the multiple frequency components of the torsional excitation disappear. Further investigation shows that the vibration amplitudes in combined frequencies increase rapidly in transversal, torsional, and axial vibration with increasing slant crack depth. The results are helpful for the understanding the dynamic behavior of a rotor system with a slant crack on a shaft and can be used for the detection of the slant crack on a shaft.
关键词: rotor dynamics slant crack stability torsional excitation open and close
Study on wave rotor refrigerators
Yuqiang DAI, Dapeng HU, Meixia DING
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 83-87 doi: 10.1007/s11705-009-0075-y
关键词: wave rotor refrigeration unsteady flow theory wave diagram
Application of high-turning bowed compressor stator to redesign of highly loaded fan stage
LI Shaobin, SU Jiexian, WANG Zhongqi
《能源前沿(英文)》 2008年 第2卷 第4期 页码 534-540 doi: 10.1007/s11708-008-0066-6
关键词: off-design different numerical contouring technique high-performance compressor
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
《农业科学与工程前沿(英文)》 2018年 第5卷 第2期 页码 159-167 doi: 10.15302/J-FASE-2018216
关键词: CFD simulation downwash flow field numerical analysis plant protection six-rotor UAV
Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG
《能源前沿(英文)》 2016年 第10卷 第1期 页码 88-104 doi: 10.1007/s11708-015-0387-1
关键词: 700°C ultra-super-critical unit steam turbine very high pressure rotor structure strength design strength design criteria finite element analysis
标题 作者 时间 类型 操作
Impact analysis of compressor rotor blades of an aircraft engine
Y B SUDHIR SASTRY, B G KIROS, F HAILU, P R BUDARAPU
期刊论文
Optimization model for rotor blades of horizontal axis wind turbines
LIU Xiong, CHEN Yan, YE Zhiquan
期刊论文
A new and best approach for early detection of rotor and stator faults in induction motors coupled to
Abderrahim ALLAL,Boukhemis CHETATE
期刊论文
Effects of rotor and stator geometry on dissolution process and power consumption in jet-flow high shear
Lin Yang, Wenpeng Li, Junheng Guo, Wei Li, Baoguo Wang, Minqing Zhang, Jinli Zhang
期刊论文
Condition monitoring of a wind turbine generator using a standalone wind turbine emulator
Himani,Ratna DAHIYA
期刊论文
Two-sided ultrasonic surface rolling process of aeroengine blades based on on-machine noncontact measurement
Shulei YAO, Xian CAO, Shuang LIU, Kaiming ZHANG, Xiancheng ZHANG, Congyang GONG, Chengcheng ZHANG
期刊论文
A novel NN based rotor flux MRAS to overcome low speed problems for rotor resistance estimation in vector
Venkadesan ARUNACHALAM,Himavathi SRINIVASAN,A. MUTHURAMALINGAM
期刊论文
Timing decision-making method of engine blades for predecisional remanufacturing based on reliability
Le CHEN, Xianlin WANG, Hua ZHANG, Xugang ZHANG, Binbin DAN
期刊论文
Stability and dynamics of rotor system with 45° slant crack on shaft
Yanli LIN, Xiaohui SI, Fulei CHU
期刊论文
Application of high-turning bowed compressor stator to redesign of highly loaded fan stage
LI Shaobin, SU Jiexian, WANG Zhongqi
期刊论文
The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
期刊论文