Specifications

Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
6.
Accession number: 20133016533857
Title: Mixing mechanism of multiphase flow and acceleration performance in single inlet
rear-mixed jet flow crushing
Authors: Wan, Jiwei1 ; Niu, Zhengming1 ; Liao, Weili1 ; Niu, Zhunong2/万继伟;牛争鸣;廖伟
丽;牛助农
Author affiliation:
1 Institute of Water Resources and Hydroelectric Engineering, Xi'an University of Technology,
Xi'an 710048, Shaanxi, China
2 Shaanxi Gas Group Co., Ltd., Xi'an 710016, Shaanxi, China
Corresponding author: Wan, J. ([e-mail])
Source title: Huagong Xuebao/CIESC Journal
Abbreviated source title: Huagong Xuebao
Volume: 64
Issue: 7
Issue date: July 2013
Publication year: 2013
Pages: 2418-2427
Language: Chinese
ISSN: 04381157
CODEN: HUKHAI
Document type: Journal article (JA)
Publisher: Chemical Industry Press, No. 3 Huixinli, Chaoyangqu, Beijing, 100029, China
Abstract: In order to deeply understand the super fine crushing technology of rear-mixed
high-speed water jet flow, the mixing and jetting behavior of gas-liquid-solid three phases in
acceleration tube with various diameter were investigated by using numerical simulation and
crushing experiment methods. Mixing mechanism and acceleration performance of multiphase
mixture jet flow were explored, and particles distributions in acceleration space were obtained.
The result showed that aeration and entrainment effects of jet flow turbulent motion were the
inherent mechanism of mixed attached phase. There existed many partition zones in the
rear-mixed jet flow for particle acceleration. Whereby the nearer to the potential flow zone, the
stronger the impact energy. Accordingly, optimizing configuration of the optional nozzle diameter
with the acceleration tube diameter could force the particles near or enter the potential flow
zone, whereby effectively improving grinding yield efficiency. The particles in space distribution
within the acceleration tube were in the highest contents in high-efficiency acceleration zones of
the outer and inner layers. As a result, the nearer to the potential flow zone, the fewer the
particles. The particle contents in the air flow zone increased with increasing acceleration tube
diameter. It was difficult for the particles to enter the ideal acceleration zone so that most of the
particles were accelerated by relying on the high-efficiency acceleration zone of the inner and
outer layers. In the case of maintaining the flowing morphological state of free jet flow, the
grinding yield efficiency decreased with increasing acceleration tube diameter. Accordingly small
tube diameter was of better constraint and concentration functions for water jet flow energy and