Evaluation of Adhesive Strength Distribution Based on Reentrainment Phenomena
Evaluation of Adhesive Strength Distribution Based on Reentrainment Phenomena
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DOI：
10.4164/sptj.31.719
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发表时间：
1994-10
影响因子：
--
通讯作者：
S. Matsusaka;Kouichi Mizumoto;Masanori Koumura;Hiroaki Masuda
中科院分区：
文献类型：
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作者：
S. Matsusaka;Kouichi Mizumoto;Masanori Koumura;Hiroaki Masuda
基于颗粒的二次夹带现象，对颗粒的粘附强度分布进行了实验研究。将完全分散的气溶胶细颗粒沉积在测试件上，并在气流通道中进行颗粒再夹带测试。在此基础上，得到了二次卷吸效率与壁面切应力的关系。从二次卷吸效率曲线可以得到两种粘附强度分布：一种与颗粒-壁面相互作用（粘附力）有关，另一种与颗粒-颗粒相互作用（凝聚力）有关。它们分别是由初级颗粒和团聚颗粒的再夹带引起的。两种粘附强度分布均采用对数正态分布表示，并根据几何平均值和几何标准差进行评价。通过对团聚颗粒再卷吸现象的分析，提出了一个简单的团聚颗粒再卷吸质量分数计算公式。
The adhesive strength distributions of particles were experimentally evaluated based on the reentrainment phenomena. Fully dispersed fine aerosol particles were deposited on a test piece, and the particle reentrainment tests were carried out in an air-flow channel. Then, the relationships between reentrainment efficiency and the corresponding wall shear stress were obtained. Two kinds of adhesive strength distribution were found to be obtained from the reentrainment efficiency curve:one is related to particle-wall interaction (adhesion), and the other is related to particle-particle interaction (cohesion). They were caused by the reentrainment of primary particles and agglomerated particles, respectively. Both of the two kinds of adhesive strength distribution were represented by a log-normal distribution and were evaluated based on the geometric mean and the geometric standard deviation. Further-more, the mass fraction of reentrained agglomerated particles was well represented by a simple equation derived from the analysis of the reentrainment phenomena.