Transient characteristics of fine powder flows within fluidized dense phase pneumatic conveying systems

被引：10
作者：
Alkassar, Yassin [1 ]
Agarwal, Vijay K. [1 ]
Behera, Niranjana [2 ]
Jones, Mark G. [3 ]
Pandey, R. K. [4 ]
机构：
[1] IIT Delhi, Ind Tribol Machine Dynam & Maintenance Engn Ctr, New Delhi 110016, India
[2] VIT Univ, Sch Mech Engn SMEC, Vellore 632014, Tamil Nadu, India
[3] Univ Newcastle, Sch Engn, Ctr Bulk Solids & Particulate Technol, Callaghan, NSW 2308, Australia
[4] IIT Delhi, Dept Mech Engn, New Delhi 110016, India
来源：
POWDER TECHNOLOGY | 2019年 / 343卷
关键词：
Fluidized dense phase; Pulsatile; Wavelet; Pulse structures; SOLIDS FRICTION FACTOR; SCALE-UP PROCEDURES; PRESSURE-FLUCTUATIONS; PARAMETER ANALYSIS; PARTICLE-SIZE; PROPAGATION; VELOCITY; WAVES; ATTENUATION; MODE;
D O I：
10.1016/j.powtec.2018.11.081
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The objective of this paper is to report the experimental findings related to the pressure fluctuations in the fluidized dense phase pneumatic conveying of fine powders in the pipeline. Investigation has also been carried out to understand the relation between pressure pulse characteristics and specific power consumption and pneumatic conveying parameters. In addition, the transition in mode of flow along the downstream of flow of fine powders has been assessed and discussed. The wavelet analysis (Daubechies db4 wavelet) of signals of air pulses revealed that the moving bed flow possesses the transient feature and pulsatile phenomenon characterized by multiple amplitudes and random frequencies. Variations of pulse structures along the length of pipeline have been observed due to occurring of frequent aeration and de-aeration of dunes during the conveying. Substantial variations in pulse structures have also been found with different types of bulk materials. Pulse velocities of air between two data points are found higher at high solid loading ratios leading to low voidage in case of dense phase flow. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：629 / 643
页数：15
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