CIMS論文的天地

 

方形分離器內部兩相流場的PDA實驗研究

注意:本論文已在《中國電機工程學報》2001,21(2):42-45發表
使用者請注明論文出處
蘇亞欣 周勁松 駱仲泱 岑可法
(浙江大學熱能工程研究所,杭州,310027)

摘 要: 應用三維顆粒動態分析儀(3D-PDA)對方形下排氣分離器內的氣固兩相流場進行了測試,得到了幾種工況條件下的流場矢量分布。研究發現分離器方腔內的流場偏離其幾何中心,并呈中間為強旋流動和邊壁附近為弱旋的準自由渦區的特點,且在邊角處存在局部小旋渦。不等溫流場比等溫流場要均勻一些,但旋流強度減弱,分離效率降低。研究結果對于分析分離器的分離機理和結構優化有一定的指導意義。 
關鍵詞: 方形下排氣旋風分離器 氣固兩相流 3D-PDA

An experimental study on the gas-solid two-phase flow in a square cyclone separator with downward gas exit by 3D-PDA

SU Yaxin ZHOU Jinsong LUO Zhongyang CEN Kefa
( Institute of Thermal Power Engineering, Zhejiang University, Hangzhou, 310027 )

Abstract: Three dimensional Particle Dynamic Analyzer (3D-PDA) was employed to measure the gas-solid two-phase flow in a lab-scale square cyclone separator with downward gas exit under 4 cases of different inlet velocity and particle concentration. The particle used in the test was glass beard of mean diameter 30~40mm. It's found that the center of the flow field deviated from the geometric center of the cyclone. The flow fields showed a feature of Rankine eddy, i.e. strongly swirling region in the central part and pseudo-free eddy region of weak swirling intensity near the cyclone wall. Local vortex existed at the corners where the flow changed its direction sharply. When the cyclone wall was heated and the suspension temperature was elevated, it's found that the flow field became more uniform than that under room-temperature condition. The local vortex at the corners were weakened and the swirling intensity became poorer which led to a decreased total mean separation efficiency from about 81% to 76.5%. The results of this paper provide a further understand of the separation mechanism and guidance for the optimization of the square cyclone separator structure.
Keywords: square cyclone separator with downward; gas exit gas-solid suspension; 3D-PDA

1瀏覽PDF格式全文需要使用軟件--Abode Acrobat(由于軟件較大并常見,我站不提供下載)

2、下載論文全文請點擊鼠標右鍵“另存為”或使用網絡螞蟻下載(86KB)


本站收錄的本文作者的其他論文:

1、方形旋風分離器內顆粒濃度分布特性的實驗研究

2、釘肋肋列傳熱的最小熵產優化分析

3、循環流化床顆粒團更新傳熱模型的修正

4、方形冷卻型分離器內壁面和兩相流間的傳熱理論模型

5、方形旋風分離器內氣固兩相流湍流特性的研究

 更多相關論文請點擊本站的<<<站內全文搜索>>>查找

歡迎您參加討論,發表您對此論文及其研究領域的看法!
(請在發言時在標題中使用所點評的論文的題目或研究方向,這樣方便大家瀏覽!)

返回首頁 | CIMS論文 | 并行工程 | 虛擬制造 | 敏捷制造 | 其他論文 | 項目開發 | 學術資源 | 站內全文搜索 | 免費論文網站大全 |

line.gif (4535 字節)

為了更好的為大家服務,歡迎您參加本站的投票調查

>>>>參加更多投票調查請點擊!

本站永久域名:http://www.sqvswk.live歡迎訪問

注意:本站內容未經書面允許不得轉載

All rights reserved, all contents copyright 2000-2019
本站自2000年3月總網頁訪問量為
pk10开奖记录直播