The spatial structure of the velocity field in a stirred vessel with water has been measured and analyzed using the laser Doppler velocimeter technique, with the immersing depth and agitation speed of the impeller re-...The spatial structure of the velocity field in a stirred vessel with water has been measured and analyzed using the laser Doppler velocimeter technique, with the immersing depth and agitation speed of the impeller re-maining approximately constant. The experimental results were provided such as the mean velocity field, fluctuat-ing velocities, turbulent kinetic energy, Reynolds shear stress and time series of the velocity in the stirred tank. These results probably provided the valuable basis to further optimize and enlarge the stirred tank in the industrial process.展开更多
A water track laser Doppler velocimeter(LDV)is developed with advantages of high update rate,high real-time performance,high concealment,light weight,and small dimensions.The water track LDV measures the advance veloc...A water track laser Doppler velocimeter(LDV)is developed with advantages of high update rate,high real-time performance,high concealment,light weight,and small dimensions.The water track LDV measures the advance velocity of the underwater vehicle with respect to the surrounding water.The experimental results show that the water track LDV has an accuracy of 96.4%when the moving velocity of the vehicle with respect to the ground exceeds 0.25 m/s.Thus,the water track LDV is promising in the application of underwater navigation to aid the strapdown inertial navigation system.展开更多
基金Supported by the Natural Science Foundation of Inner Mongolia (No.200408020715).
文摘The spatial structure of the velocity field in a stirred vessel with water has been measured and analyzed using the laser Doppler velocimeter technique, with the immersing depth and agitation speed of the impeller re-maining approximately constant. The experimental results were provided such as the mean velocity field, fluctuat-ing velocities, turbulent kinetic energy, Reynolds shear stress and time series of the velocity in the stirred tank. These results probably provided the valuable basis to further optimize and enlarge the stirred tank in the industrial process.
基金supported by the Major Basic Autonomous Research Project of College of Advanced Interdisciplinary Studies,National University of Defense Technology,China(No.ZDJC19-12)the Natural Science Foundation of Hunan Province,China(No.2021JJ30782)。
文摘A water track laser Doppler velocimeter(LDV)is developed with advantages of high update rate,high real-time performance,high concealment,light weight,and small dimensions.The water track LDV measures the advance velocity of the underwater vehicle with respect to the surrounding water.The experimental results show that the water track LDV has an accuracy of 96.4%when the moving velocity of the vehicle with respect to the ground exceeds 0.25 m/s.Thus,the water track LDV is promising in the application of underwater navigation to aid the strapdown inertial navigation system.
