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Cavitation in semi-open centrifugal impellers for a miniature pump
LUO Xianwu, LIU Shuhong, ZHANG Yao, XU Hongyuan
《能源前沿(英文)》 2008年 第2卷 第1期 页码 31-35 doi: 10.1007/s11708-008-0011-8
关键词: cavitation performance semi-open impeller increased two-dimensional efficiency
Assessment of fatigue life of remanufactured impeller based on FEA
Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 219-226 doi: 10.1007/s11465-016-0394-x
Predicting the fatigue life of remanufactured centrifugal compressor impellers is a critical problem. In this paper, the S-N curve data were obtained by combining experimentation and theory deduction. The load spectrum was compiled by the rain-flow counting method based on the comprehensive consideration of the centrifugal force, residual stress, and aerodynamic loads in the repair region. A fatigue life simulation model was built, and fatigue life was analyzed based on the fatigue cumulative damage rule. Although incapable of providing a high-precision prediction, the simulation results were useful for the analysis of fatigue life impact factors and fatigue fracture areas. Results showed that the load amplitude greatly affected fatigue life, the impeller was protected from running at over-speed, and the predicted fatigue life was satisfied within the next service cycle safely at the rated speed.
关键词: remanufactured impeller fatigue life impeller failures finite element analysis (FEA)
Mesoscale fabrication of a complex surface for integral impeller blades
Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 116-131 doi: 10.1007/s11465-017-0426-1
Integral impeller is the most important component of a mini-engine. However, the machining of a mesoscale impeller with a complex integral surface is difficult because of its compact size and high accuracy requirement. A mesoscale component is usually manufactured by milling. However, a conventional milling tool cannot meet the machining requirements because of its size and stiffness. For the fabrication of a complex integral impeller, a micro-ball-end mill is designed in accordance with the non-instantaneous-pole envelope principle and manufactured by grinding based on the profile model of the helical groove and the mathematical model of the cutting edge curve. Subsequently, fractal theory is applied to characterize the surface quality of the integral impeller. The fractal theory-based characterization shows that the completed mesoscale integral impeller exhibits a favorable performance in terms of mechanical properties and morphological accuracy.
关键词: mesoscale fabrication micro-milling tool mesoscale milling impeller blade
Damage mechanism and evaluation model of compressor impeller remanufacturing blanks: A review
Haiyang LU, Yanle LI, Fangyi LI, Xingyi ZHANG, Chuanwei ZHANG, Jiyu DU, Zhen LI, Xueju RAN, Jianfeng LI, Weiqiang WANG
《机械工程前沿(英文)》 2019年 第14卷 第4期 页码 402-411 doi: 10.1007/s11465-019-0548-8
关键词: remanufacturing centrifugal compressor impeller remanufacturing blank damage mechanism evaluation model
Micromixing performance of the teethed high shear mixer under semi-batch operation
《化学科学与工程前沿(英文)》 2022年 第16卷 第4期 页码 546-559 doi: 10.1007/s11705-021-2069-3
关键词: high shear mixer semi-batch operation micromixing performance Villermaux/Dushman system segregation index
Design and analyses of open-ended pipe piles in cohesionless soils
Yuan GUO,Xiong (Bill) YU
《结构与土木工程前沿(英文)》 2016年 第10卷 第1期 页码 22-29 doi: 10.1007/s11709-016-0314-5
Bending and rotational behaviour of semi-continuous composite beams
WANG Jingfeng, LI Guoqiang
《结构与土木工程前沿(英文)》 2008年 第2卷 第2期 页码 116-122 doi: 10.1007/s11709-008-0015-9
关键词: rotational effective deflection calculation semi-continuous composite full-scale semi-rigid
Thermal response of steel framing members in open car park fires
Xia YAN; Marion CHARLIER; Thomas GERNAY
《结构与土木工程前沿(英文)》 2022年 第16卷 第9期 页码 1071-1088 doi: 10.1007/s11709-022-0879-0
关键词: open car park localized fire steel frame numerical modeling computational fluid dynamics
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 147-152 doi: 10.1007/s11465-009-0025-x
关键词: flame pipe cutting flame incision tracks CNC open architecture CNC system
Prediction of the theoretical and semi-empirical model of ambient temperature
Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI
《能源前沿(英文)》 2016年 第10卷 第3期 页码 268-276 doi: 10.1007/s11708-016-0413-y
关键词: ambient temperature environment correlation theoretical model semi-empirical
Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode
Tao Lu, Qilei Zhang, Shanjing Yao
《化学科学与工程前沿(英文)》 2017年 第11卷 第3期 页码 338-345 doi: 10.1007/s11705-017-1644-0
关键词: dye mycelial pellets marine fungus bubble column reactor semi-continuous biosorption
Evaluation of the harmonic scalpel in open surgery for abdominal aortic aneurysm
null
《医学前沿(英文)》 2012年 第6卷 第1期 页码 85-88 doi: 10.1007/s11684-012-0174-x
The harmonic scalpel is a hemostatic device primarily designed for use in laparoscopic surgery. During the last few years, many surgeons have begun to use the harmonic scalpel in open surgery. Several papers have cited the benefits of the device compared with conventional knot-tying techniques; however, no evidence showing the advantages of using the harmonic scalpel in complicated abdominal aortic aneurysm (AAA) surgery has been presented. The aim of the present study is to determine the value of the harmonic scalpel in open operation for AAA. A total of 153 patients who underwent open surgery for AAA at the Department of Vascular Surgery of Guangdong General Hospital, China between January 2001 and December 2010, were retrospectively analyzed. Open surgery performed with the harmonic scalpel on 105 patients was compared with open operation using conventional knot-tying techniques on 48 patients. The operative time, intraoperative blood loss, total postoperative drainage fluid volumes, hospital stay, and postoperative complications between the two groups were compared. The harmonic scalpel group was associated with a shorter operation time (113.2±23.6 min vs. 232.1±39.2 min, P<0.01) and lower intraoperative blood loss (126.1±96.6 ml vs. 592.1±207.2 ml, P<0.01). Postoperative drainage fluid volumes were greater in the conventional surgery group than in the harmonic scalpel group (702.1±192.8 ml vs. 198.5±97.4 ml, P<0.01). The hospital stay was shorter for the harmonic scalpel group than for the conventional surgery group (10.7±3.3 d vs. 16.5±4.7 d, P<0.05). No differences between the postoperative complications or hospital mortality of the two groups were found. The harmonic scalpel is a safe and minimally invasive tool in open surgery for AAA and is associated with shorter operative time, shorter hospital stay, and lower intraoperative blood loss and postoperative drainage fluid volumes compared with conventional knot-tying techniques.
关键词: abdominal aortic aneurysm harmonic scalpel minimally invasive
Experimental study on flow behavior at open channel confluences
WANG Xiekang, WANG Xianye, LU Weizhen, LIU Tonghuan
《结构与土木工程前沿(英文)》 2007年 第1卷 第2期 页码 211-216 doi: 10.1007/s11709-007-0025-z
《化学科学与工程前沿(英文)》 2022年 第16卷 第12期 页码 1793-1806 doi: 10.1007/s11705-022-2191-x
关键词: petrochemical solid wastes vanadium recovery resource utilization nanomaterials semi-hydrogenation
Effects of inner sleeves on the inner frictional resistance of open-ended piles driven into sand
Janaka J. KUMARA,Yoshiaki KIKUCHI,Takashi KURASHINA,Takahiro YAJIMA
《结构与土木工程前沿(英文)》 2016年 第10卷 第4期 页码 499-505 doi: 10.1007/s11709-016-0335-0
关键词: bearing capacity inner frictional resistance inner sleeve open-ended piles soil plugging
标题 作者 时间 类型 操作
Cavitation in semi-open centrifugal impellers for a miniature pump
LUO Xianwu, LIU Shuhong, ZHANG Yao, XU Hongyuan
期刊论文
Assessment of fatigue life of remanufactured impeller based on FEA
Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG
期刊论文
Mesoscale fabrication of a complex surface for integral impeller blades
Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN
期刊论文
Damage mechanism and evaluation model of compressor impeller remanufacturing blanks: A review
Haiyang LU, Yanle LI, Fangyi LI, Xingyi ZHANG, Chuanwei ZHANG, Jiyu DU, Zhen LI, Xueju RAN, Jianfeng LI, Weiqiang WANG
期刊论文
Thermal response of steel framing members in open car park fires
Xia YAN; Marion CHARLIER; Thomas GERNAY
期刊论文
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
期刊论文
Prediction of the theoretical and semi-empirical model of ambient temperature
Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI
期刊论文
Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode
Tao Lu, Qilei Zhang, Shanjing Yao
期刊论文
Experimental study on flow behavior at open channel confluences
WANG Xiekang, WANG Xianye, LU Weizhen, LIU Tonghuan
期刊论文
Utilization of waste vanadium-bearing resources in the preparation of rare-earth vanadate catalysts for semi-hydrogenation
期刊论文