流化床燃烧声发射与气固两相流特性研究

详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文

英文篇名：STUDY ON PROPERTIES OF ACOUSTIC EMISSIONS AND GAS-SOLID MULTIPHASE FLOW IN THE COAL-FIRED FLUIDIZED BED 中文刊名：工程热物理学报 英文刊名：JOURNAL OF ENGINEERING THERMOPHYSICS 作者：刘勇 ; 唐晓军 ; 杨宏旻 ; 顾璠 ; 徐益谦 英文作者：LIU Yong ; TANG Xiaojun ; YANG Hongmin ; GU Fan ; XU Yiqian(Southeast University ; Nanjing 210018 ) 中文关键词：流化床 ; 声波 ; 气固两相流 ; 实验研究 英文关键词：fluidized bed ; acoustic emissions ; gas-solid multiphase flow 出版日期：1999-01-10 机构：东南大学热能工程研究所!南京２１００１８,东南大学热能工程研究所!南京２１００１８,东南大学热能工程研究所!南京２１００１８,东南大学热能工程研究所!南京２１００１８,东南大学热能工程研究所!南京２１００１８ 年：1999 期：01 出版单位：工程热物理学报

摘要

Through the experimental study and theoretical analysis on the acoustic emission, theproperties of the gas-particles two-phase flow in the fluidized bed were studied in the coal-firedfluidized bed combustion in the paper. The experimental studies comprise the sound wavedetecting in the bed and digital analysis of the signals. The wavelet transform and Wignerdistribution were used to obtain the energy distribution and the time--varying spectrumdistribution of the sound emitting from the bed. Based on the eXperimental results, theproduce of the bubbles breaking in the bed under the various rate of the fluidized air masswas analyzed, the fractal characteristic of the random motions of gas-particle two-phase flowin the bed were discovered from the information of the sound emission, and the principles ofthe gas-particle multiphase flow in the fluidized bed were developed.

引文

[1] M Atkinson, H K Kytsmaa. Acoustic Wave Speed and Attenuation in Suspensions. Int. J. MultiphaseFlow, 1992, 18(4): 577-592
    [2]郑治真,张少芬.瞬态谱估计理论及其应用.北京:地震出版社,1993,124—200
    [3]. J Feder, Fractals. Plenum. New York. 1980, 149-154