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Effects of Sm Content on Thermal Stability of Sm2Co17 Sintered Magnets
Minggang Zhu,Wei Sun,Haibo Feng,Yanfeng Li,Yikun Fang,Dong Zhou,Wei Li 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Influence of Sm content on thermal stability of Sm2Co17 sintered magnets has been investigated. It is found that the temperature coefficients of remanence (α) first decrease, runs through a minimum,then starts to increases with increasing Sm content. During the sintering process, liquidphase (SmCo1.7) is beneficial to densification of the magnets. A substitution of Co for Fe in Sm-Cosintered magnets has been proved to decrease the α and improve the thermal stability of thesematerials.
Employing rotating vaneless diffuser to enhance the performance of plenum fan
Hua-Shu Dou,Lin Wu,Yikun Wei,Yongning Chen,Wenbin Cao,Cunlie Ying 한국유체기계학회 2017 International journal of fluid machinery and syste Vol.10 No.1
Numerical simulation is carried out for flow characteristics in a plenum fan and the influence of the diameter ratio of the rotating vaneless diffuser on the performance of plenum fan is analyzed. The diameter ratio of the rotating vaneless diffuser employed is from 1.03 to 1.3. The research results show that the rotating vaneless diffuser is able to enhance the performance of plenum fan. It is found that there is significant improvement in static pressure and efficiency at the diameter ratio of 1.05 at high flow coefficients, while the optimal diameter ratio is 1.2 at rated and low flow coefficient.
Employing rotating vaneless diffuser to enhance the performance of plenum fan
Dou, Hua-Shu,Wu, Lin,Wei, Yikun,Chen, Yongning,Cao, Wenbin,Ying, Cunlie Korean Society for Fluid machinery 2017 International journal of fluid machinery and syste Vol.10 No.1
Numerical simulation is carried out for flow characteristics in a plenum fan and the influence of the diameter ratio of the rotating vaneless diffuser on the performance of plenum fan is analyzed. The diameter ratio of the rotating vaneless diffuser employed is from 1.03 to 1.3. The research results show that the rotating vaneless diffuser is able to enhance the performance of plenum fan. It is found that there is significant improvement in static pressure and efficiency at the diameter ratio of 1.05 at high flow coefficients, while the optimal diameter ratio is 1.2 at rated and low flow coefficient.
Optimization of Blade Profile of a Plenum Fan
Wu, Lin,Dou, Hua-Shu,Wei, Yikun,Chen, Yongning,Cao, Wenbin,Ying, Cunlie Korean Society for Fluid machinery 2016 International journal of fluid machinery and syste Vol.9 No.1
A method of optimization design for the blade profile of a centrifugal impeller by controlling velocity distribution is presented, and a plenum fan is successfully designed. This method is based on the inner flow calculation inside the centrifugal impeller, and is related to the distribution of relative velocity. The results show that after optimization, the boundary layer separation on the suction surface has been inhibited and the stability of plenum fan is improved. The flow at the impeller outlet is also studied, and the jet-wake pattern at the impeller outlet is improved obviously by optimization. The calculation result shows that the static pressure and static pressure efficiency can be increased by 15.4% and 21.4% respectively.
Optimization of Blade Profile of a Plenum Fan
Lin Wu,Hua-Shu Dou,Yikun Wei,Yongning Chen,Wenbin Cao,Cunlie Ying 한국유체기계학회 2016 International journal of fluid machinery and syste Vol.9 No.1
A method of optimization design for the blade profile of a centrifugal impeller by controlling velocity distribution is presented, and a plenum fan is successfully designed. This method is based on the inner flow calculation inside the centrifugal impeller, and is related to the distribution of relative velocity. The results show that after optimization, the boundary layer separation on the suction surface has been inhibited and the stability of plenum fan is improved. The flow at the impeller outlet is also studied, and the jet-wake pattern at the impeller outlet is improved obviously by optimization. The calculation result shows that the static pressure and static pressure efficiency can be increased by 15.4% and 21.4% respectively.