Modeling of droplet dynamic and thermal behaviour during spray deposition

被引：16

作者：

Mahesh, NS ^{[1
]}

Mendonca, J

Muralidhara, MK

Muralidhara, BK

Ramachandra, C

机构：

[1] MS Ramaiah Inst Technol, Dept Engn Mech, Bangalore 560054, Karnataka, India

[2] Univ Visvesvaraya, Coll Engn, Dept Engn Mech, Bangalore 560001, Karnataka, India

[3] Fenn Coll Engn, Dept Chem Engn, Cleveland, OH 44115 USA

来源：

BULLETIN OF MATERIALS SCIENCE | 2003年 / 26卷 / 03期

关键词：

supersonic atomization; droplets; thermal history; solid fraction; secondary dendrite arm spacing;

D O I：

10.1007/BF02707459

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mathematical modeling of supersonic gas atomization for spray forming has been investigated. Influence of the droplet dynamic and thermal behaviour on the resultant microstructure has been studied. Analytical models have been constructed taking into account the higher Reynolds number owing to supersonic gas flow. The impact velocity profiles of the droplets lend credence to the evolution of equiaxed grain morphology through dendrite fragmentation. The thermal history profile along with the fraction solid plot could yield optimized standoff distance to obtain a mushy droplet. A comparison of secondary dendrite arm spacing obtained from the mathematical model showed good agreement with experimental observations.

引用

页码：355 / 364

页数：10

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