A hydrocyclone quench box was designed according to the fluid dynamics of spiral flow.The quench box size, the drainage tube diameter, and the inlet tube diameter were designed based on Froude number and conservation ...A hydrocyclone quench box was designed according to the fluid dynamics of spiral flow.The quench box size, the drainage tube diameter, and the inlet tube diameter were designed based on Froude number and conservation of mechanical energy.The pressure drop of the hydrocyclone quench box was measured, and the liquid volumetric mass transfer coefficient was determined by oxygen absorption.The hydrocyclone quench box was compared with the horizontal flow quench box.The streamline of hydrocyclone quench box was simulated by computational fluid dynamics software.It was found that the pressure-drop and liquid volumetric mass transfer coefficient of the hydrocyclone quench box was better than the horizontal flow quench box .The pressure drop was less than 20 kPa and the liquid volumetric mass transfer coefficient was 0.0256 s -1 at 10 m 3·h -1 liquid flow rate and 60 m 3·h -1 gas flow rate.Simulation indicated that the average length of streamline under spiralling was 4 times of that under non-spiralling condition, which enhanced mixing for gas and liquid.展开更多
The high efficiency hydrogen fiber Bragg grating （FBG） sensor is presented. The sensitive film was a new alliance of palladium-silver （Pd-Ag）. In addition, the titanium （Ti） layer was used as the adhesive layer....The high efficiency hydrogen fiber Bragg grating （FBG） sensor is presented. The sensitive film was a new alliance of palladium-silver （Pd-Ag）. In addition, the titanium （Ti） layer was used as the adhesive layer. The presented sensor showed the resolution of more than 60pm/1%H2, and a fast response time of4s - 5s was guaranteed in the 0.1%H2 - 4%H2 range. Moreover, the life time of the sensor was investigated. The obtained results showed that the sensor had an enhanced life time. Furthermore, the sensor was applied in the propulsion system fuel tank model of the aerospace vehicle. The obtained results indicated that it is a prevention system against the disaster aerospace due to hydrogen leakage.展开更多
文摘A hydrocyclone quench box was designed according to the fluid dynamics of spiral flow.The quench box size, the drainage tube diameter, and the inlet tube diameter were designed based on Froude number and conservation of mechanical energy.The pressure drop of the hydrocyclone quench box was measured, and the liquid volumetric mass transfer coefficient was determined by oxygen absorption.The hydrocyclone quench box was compared with the horizontal flow quench box.The streamline of hydrocyclone quench box was simulated by computational fluid dynamics software.It was found that the pressure-drop and liquid volumetric mass transfer coefficient of the hydrocyclone quench box was better than the horizontal flow quench box .The pressure drop was less than 20 kPa and the liquid volumetric mass transfer coefficient was 0.0256 s -1 at 10 m 3·h -1 liquid flow rate and 60 m 3·h -1 gas flow rate.Simulation indicated that the average length of streamline under spiralling was 4 times of that under non-spiralling condition, which enhanced mixing for gas and liquid.
文摘The high efficiency hydrogen fiber Bragg grating （FBG） sensor is presented. The sensitive film was a new alliance of palladium-silver （Pd-Ag）. In addition, the titanium （Ti） layer was used as the adhesive layer. The presented sensor showed the resolution of more than 60pm/1%H2, and a fast response time of4s - 5s was guaranteed in the 0.1%H2 - 4%H2 range. Moreover, the life time of the sensor was investigated. The obtained results showed that the sensor had an enhanced life time. Furthermore, the sensor was applied in the propulsion system fuel tank model of the aerospace vehicle. The obtained results indicated that it is a prevention system against the disaster aerospace due to hydrogen leakage.
