We investigate the dynamic characteristics of oil-gas-water three-phase flow in terms of chaotic attractor comparison. In particular, we extract a statistic to characterize the dynamical difference in attractor probab...We investigate the dynamic characteristics of oil-gas-water three-phase flow in terms of chaotic attractor comparison. In particular, we extract a statistic to characterize the dynamical difference in attractor probability distribution. We first take time series from Logistic chaotic system with different parameters as examples to demonstrate the effectiveness of the method. Then we use this method to investigate the experimental signals from oil-gas-water three-phase flow. The results indicate that the extracted statistic is very sensitive to the change of flow parameters and can gain a quantitatively insight into the dynamic characteristics of different flow patterns.展开更多
According to fluidization and bond laws for type D particles, the processes from normal fluidization to shut-down controlled by solid-bridge force were investigated by experiment.Near-wall wind and spiral wind were us...According to fluidization and bond laws for type D particles, the processes from normal fluidization to shut-down controlled by solid-bridge force were investigated by experiment.Near-wall wind and spiral wind were used to improve the bond behavior of coarse cohesive particles in fluidization process.S attractor comparison method was adopted to evaluate various measures.The results showed that both near-wall wind and spiral wind could improve particle bond behavior in total, slowing down bond evolution and decreasing bond effect.Near-wall wind could delay the happening of fluidization abnormalities while spiral wind could bring forward the happening of fluidization abnormalities.S value reflected the bond effect and bond evolution well in various cases, so it could be used as a criterion of fluidization quality in fluidized processes.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.41174109 and 61104148)the National Science and Technology Major Project of the Ministry of Science and Technology of China(Grant No.2011ZX05020-006)the Tianjin City High School Science and Technology Fund Planning Project,China(Grant No.20130718)
文摘We investigate the dynamic characteristics of oil-gas-water three-phase flow in terms of chaotic attractor comparison. In particular, we extract a statistic to characterize the dynamical difference in attractor probability distribution. We first take time series from Logistic chaotic system with different parameters as examples to demonstrate the effectiveness of the method. Then we use this method to investigate the experimental signals from oil-gas-water three-phase flow. The results indicate that the extracted statistic is very sensitive to the change of flow parameters and can gain a quantitatively insight into the dynamic characteristics of different flow patterns.
文摘According to fluidization and bond laws for type D particles, the processes from normal fluidization to shut-down controlled by solid-bridge force were investigated by experiment.Near-wall wind and spiral wind were used to improve the bond behavior of coarse cohesive particles in fluidization process.S attractor comparison method was adopted to evaluate various measures.The results showed that both near-wall wind and spiral wind could improve particle bond behavior in total, slowing down bond evolution and decreasing bond effect.Near-wall wind could delay the happening of fluidization abnormalities while spiral wind could bring forward the happening of fluidization abnormalities.S value reflected the bond effect and bond evolution well in various cases, so it could be used as a criterion of fluidization quality in fluidized processes.
