Open AccessA momentum-based method for the mass concentration measurement of pneumatically conveyed solid: design optimization
Author(s) -
Guanqing Liu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/793/1/012053
Subject(s) - momentum (technical analysis) , conical surface , tube (container) , mechanics , coefficient of restitution , sensitivity (control systems) , computational fluid dynamics , radius , metering mode , work (physics) , mechanical engineering , inlet , control theory (sociology) , materials science , aerospace engineering , physics , engineering , computer science , computer security , finance , electronic engineering , economics , control (management) , artificial intelligence
Mass concentration measurement of pneumatically conveyed solid is still challeging in industry. In our previous work (Liu G.Q., The 5th International Conference on Advances in Energy Resources and Environment Engineering , December 6-8, 2019, Chongqing, China.), a novel momentum-based method with more reliable measurement mechanism and simpler structure was developed and computationally validated with a one-end closed straight tube. In this paper, optimization on the structure of the metering tube is conducted to improve the measurement sensitivity represented by the conversion factor k . Tubes with a conical inlet are found to possess higher k than that of the straight tube. Computational fluid dynamics (CFD) computations show that k generally increases with decreasing half-cone angle at fixed radius and decreases with decreasing restitution coefficient of collision between particles and the tube walls.