MACH NUMBER ON OUTLET PLANE OF A STRAIGHT MICRO-TUBE

被引：0
|
作者：
Asako, Y. [1 ]
Kawashima, D. [1 ]
Yamada, T. [2 ]
Hong, C. [3 ]
机构：
[1] Tokyo Metropolitan Univ, Dept Mech Engn, Tokyo 1920397, Japan
[2] Lund Univ, Dept Energy Sci, SE-22100 Lund, Sweden
[3] Kagoshima Univ, Dept Mech Engn, Kagoshima 8908580, Japan
来源：
PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2013, VOL 7A | 2014年
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D O I：
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中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The Mach number and pressure on the outlet plane of a straight micro-tube were investigated numerically for both laminar and turbulent flow cases. The numerical methodology is based on the Arbitrary-Lagrangian-Eulerian (ALE) method. The LB1 turbulence model was used for the turbulent flow case. The compressible momentum and energy equations with the assumption of the ideal gas were solved. The computational domain is extended to the downstream region from the micro-tube outlet. The back pressure was given to the outside of the downstream region. The computations were performed for a tube whose diameter ranges from 50 to 500 gm. The average Mach number on the outlet plane of the fully under-expanded flow depends on the tube diameter and ranges from 1.16 to 1.25. The flow characteristics of the under-expanded gas flow in a straight micro-tube were revealed.
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