Flow Field Diagnosis" is a unified technique which takes full advantages of the theo-retical calculations and experimental measurements, to rapidly and accurately get as muchas possible the flow information in th...Flow Field Diagnosis" is a unified technique which takes full advantages of the theo-retical calculations and experimental measurements, to rapidly and accurately get as muchas possible the flow information in the turbomachinery. System of flow field diagnosis contains S2 modal, off-design loss and deviation model, and optimization modal. This paperdeveloped a new off-design loss and deviation model based on the neural network. The diagnose system including the modal shows good anastomotic with the experiment result intotal characteristic and stage characteristic of multistage axial compressor.展开更多
The fluid flow in a selective catalytic reduction(SCR)system of a 600 MW power station is optimized using the numerical simulation method in this work.Given that guide plates and straightening gratings are properly in...The fluid flow in a selective catalytic reduction(SCR)system of a 600 MW power station is optimized using the numerical simulation method in this work.Given that guide plates and straightening gratings are properly installed,the relative standard deviation(C_(v))of velocity related to the inlet of an ammonia injection grid(AIG)and catalysts satisfy the engineering demand of<15%,suggesting that a relatively uniform velocity field is obtained.The in-line arrangement of static mixers strengthens the disturbance of fluid,promoting the mixing of reductant NH_(3)with flue gas.The NH_(3)mole fraction C_(v)value correlated to the inlet of catalysts drops to ca.3.5%,which is lower than that in the cases when the mixers are aligned in a staggered style.These results indicate that a solid foundation is achieved for the effective abatement of NO_(x)in practical applications.展开更多
文摘Flow Field Diagnosis" is a unified technique which takes full advantages of the theo-retical calculations and experimental measurements, to rapidly and accurately get as muchas possible the flow information in the turbomachinery. System of flow field diagnosis contains S2 modal, off-design loss and deviation model, and optimization modal. This paperdeveloped a new off-design loss and deviation model based on the neural network. The diagnose system including the modal shows good anastomotic with the experiment result intotal characteristic and stage characteristic of multistage axial compressor.
文摘The fluid flow in a selective catalytic reduction(SCR)system of a 600 MW power station is optimized using the numerical simulation method in this work.Given that guide plates and straightening gratings are properly installed,the relative standard deviation(C_(v))of velocity related to the inlet of an ammonia injection grid(AIG)and catalysts satisfy the engineering demand of<15%,suggesting that a relatively uniform velocity field is obtained.The in-line arrangement of static mixers strengthens the disturbance of fluid,promoting the mixing of reductant NH_(3)with flue gas.The NH_(3)mole fraction C_(v)value correlated to the inlet of catalysts drops to ca.3.5%,which is lower than that in the cases when the mixers are aligned in a staggered style.These results indicate that a solid foundation is achieved for the effective abatement of NO_(x)in practical applications.
