The partial opening of the working gate for a discharge tunnel is used more and more widely in the various conditions, such as releasing discharge to meet the needs of the various stages under construction, or of the ...The partial opening of the working gate for a discharge tunnel is used more and more widely in the various conditions, such as releasing discharge to meet the needs of the various stages under construction, or of the operations at low reservoir levels. In this article the hydraulic characteristics were investigated of the partial opening of the working gate based on the physical model experiments of the discharge tunnel for the Longtan Hydropower Project, including the discharge coefficient, the surface profile of the free flow section, the bottom pressure distribution of the tunnel with an aerator, the cavity length just from the ramp, and the wall pressure of the curve section of the outlet. Some new issues were discussed and the properties were presented of the partial opening of the gate.展开更多
A flexible metal-organic framework of la Cu（FMA）（4,4＇-Bpe）0.s （FMA=fumarate; 4,4＇Bpe=trans-bis-（4-pyridyl）ethylene） that exhibits guest molecule-controlled gate-opening adsorption has been reported, in which...A flexible metal-organic framework of la Cu（FMA）（4,4＇-Bpe）0.s （FMA=fumarate; 4,4＇Bpe=trans-bis-（4-pyridyl）ethylene） that exhibits guest molecule-controlled gate-opening adsorption has been reported, in which the flexible pores can be enlarged by CO2 molecules rather than CH4 and N2 under a certain gate-opening pressure. The CO2 uptake can be sharply improved from 6.85 cm3 gq at 0.60 atm to 33.7 cm3 g^-1 at 1 atm due to the gate-opening effect, thus resulting in the notably enhanced adsorption selectivities for CO2/CH4 （32：1, v/v） and CO2/N2 （48：1, v/v） separations at room temperature.展开更多
基金the National Natural Science Foundation of China (Grant No. 50539060).
文摘The partial opening of the working gate for a discharge tunnel is used more and more widely in the various conditions, such as releasing discharge to meet the needs of the various stages under construction, or of the operations at low reservoir levels. In this article the hydraulic characteristics were investigated of the partial opening of the working gate based on the physical model experiments of the discharge tunnel for the Longtan Hydropower Project, including the discharge coefficient, the surface profile of the free flow section, the bottom pressure distribution of the tunnel with an aerator, the cavity length just from the ramp, and the wall pressure of the curve section of the outlet. Some new issues were discussed and the properties were presented of the partial opening of the gate.
基金supported by an award AX-1730 from the Welch Foundation (BC)
文摘A flexible metal-organic framework of la Cu（FMA）（4,4＇-Bpe）0.s （FMA=fumarate; 4,4＇Bpe=trans-bis-（4-pyridyl）ethylene） that exhibits guest molecule-controlled gate-opening adsorption has been reported, in which the flexible pores can be enlarged by CO2 molecules rather than CH4 and N2 under a certain gate-opening pressure. The CO2 uptake can be sharply improved from 6.85 cm3 gq at 0.60 atm to 33.7 cm3 g^-1 at 1 atm due to the gate-opening effect, thus resulting in the notably enhanced adsorption selectivities for CO2/CH4 （32：1, v/v） and CO2/N2 （48：1, v/v） separations at room temperature.
