基于ARM功率谱分析的喷动流化床压力波动频率特性

被引：9

作者：

钟文琪

章名耀

机构：

[1] 东南大学洁净煤发电及燃烧技术教育部重点实验室

[2] 东南大学洁净煤发电及燃烧技术教育部重点实验室南京

[3] 南京

来源：

东南大学学报(自然科学版) | 2004年 / 04期

关键词：

流态化; 喷动流化床; 压力波动; 频率特性; ARM功率谱;

D O I：

暂无

中图分类号：

TQ051.1 [流体力学过程用机械与设备];

学科分类号：

080706 ;

摘要：

在 30 0mm× 30mm× 2 0 0 0mm的喷动流化床煤部分气化试验装置上 ,采用现代自回归模型 (ARM)功率谱分析的方法 ,系统地考察了喷动气流速、流化气流率、静止床层高度对喷动流化床床层不同位置压力波动主频的影响 .结果表明 :床层不同位置压力波动的主频随喷动气流速的增大而增大 ,随静止床高的增大而减小 ;V型布风板以上床层压力波动主频随流化气流率的增大先增大 (Qf/Qmf≤ 1 .0 )后减小 (Qf/Qmf>1 .0 ) ,布风板区域内压力波动主频随流化气流率的增大而增大 .结合数码CCD图像对结果进行分析 ,揭示了压力波动主频与床内流动结构的关系 ,这对于发展喷动流化床技术提供了新的研究方法

引用

页码：446 / 450

页数：5

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