INFLUENCE OF CROSS-FLOW ON PARTICLE COLLECTION CHARACTERISTICS OF MULTI-NOZZLE IMPACTORS

被引：46

作者：

FANG, CP ^{[1
]}

MARPLE, VA ^{[1
]}

RUBOW, KL ^{[1
]}

机构：

[1] UNIV MINNESOTA,PARTICLE TECHNOL LAB,MINNEAPOLIS,MN 55455

来源：

JOURNAL OF AEROSOL SCIENCE | 1991年 / 22卷 / 04期

关键词：

D O I：

10.1016/0021-8502(91)90001-X

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Studies of the flow fields and particle impaction characteristics are more complicated in multi-nozzle impactors than in single-nozzle impactors, since the jets of air must penetrate cross-flowing air to impinge on the impaction plate. Results of heat and mass transfer analysis are employed to describe the cross-flow pattern in multi-nozzle impactors. A cross-flow parameter has been derived to predict the deflection of the air jet by the cross-flow. This parameter is expressed as a function of the geometric parameters for the multi-nozzle impactor, D(n)N/4D(c), where N is the number of nozzles, D(n) the nozzle diameter and D(c) the nozzle cluster diameter. Empirical particle collection data show that multi-nozzle impactors operate satisfactorily, if the cross-flow parameter is less than a critical value of 1.2. Impactors operating with a cross-flow parameter larger than this critical value are shown to possess poor particle collection characteristics.

引用

页码：403 / 415

页数：13

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