Particle motion and enrichment behavior of dense granular impinging-jets generated by the nozzle with rectangular orifice  

作　　者：Ting Li Qingguo Lin Haokun Liu Shengju Wang Weifeng Li 

机构地区：[1]National Energy Coal Gasification Technology Research and Development Center,Shanghai Engineering Research Center of Coal Gasification,Engineering Research Center of Resource Utilization of Carbon-containing Waste with Carbon Neutrality,Ministry of Education,East China University of Science and Technology,Shanghai,200237,China [2]Shanghai Engineering Research Center of Space Engine,Shanghai Institute of Space Propulsion,Shanghai,201112,China

出　　处：《Particuology》2025年第1期312-327,共16页颗粒学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(grant Nos.22278133 and U21B2088).

摘　　要：Particle motion regime and enrichment behavior of dense granular impinging-jets formed by the nozzle with rectangular orifice are experimentally and numerically investigated.Two impingement patterns are identified,including long and short parallel patterns.Particles enrich in the central axis of the granular sheet when two jets impinge with the long axes parallel pattern.While at the short axes parallel pattern,particles generate two symmetrical enriched streams.The angle of particle-enriched streams is observed to increase with increasing angle of two impinging-jets and decreasing aspect ratio of the nozzle orifice.The particle image velocity(PIV)analysis results demonstrate that the circumferential distribution of the particle velocity on the granular sheet follows the Gaussian distribution.With the formation of particle-enriched streams,the concentration distribution of the particle evolves into a trimodal pattern.Results of the discrete element method(DEM)indicate that the core region with low velocity within the impact zone of impinging-jets generated by using two nozzles with rectangular orifices extends into a shuttle shape.The core region develops and extends along the horizontal(or vertical)directions at long(or short)axes impingement pattern,thereby,affecting the enrichment behavior of particles.

关 键 词：Dense granular impinging-jet Enrichment behavior Rectangular orifice 

分 类 号：O35[理学—流体力学]