Relaminarization in supersonic microjets at low Reynolds numbers

被引：0
|
作者：
V. M. Aniskin
A. A. Maslov
S. G. Mironov
机构：
[1] Russian Academy of Sciences,Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch
来源：
Technical Physics Letters | 2013年 / 39卷
关键词：
Reynolds Number; Mass Flow Rate; Technical Physic Letter; Nozzle Diameter; Pitot Tube;
D O I：
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中图分类号：
学科分类号：
摘要：
Results of measuring the length of the supersonic portion of the air jets that flow out of axisymmetric sonic nozzles 10.4 μm-1 mm in diameter are presented. The measurements are carried out in a range of degree of jet noncalculation of 1–30 and in a wide Reynolds number range, including the laminar and turbulent flow modes. It is shown that the Reynolds number calculated from the nozzle diameter and the outlet parameters of gas is the parameter that governs jet flow. It is found that, for a laminar jet mixing layer, the length of the supersonic portion sharply increases. When the jet mixing layer becomes turbulent, the length of the supersonic portion decreases. The effect of increasing the length of the supersonic portion after its decrease due to the turbulization of flow in a jet and a growth in the Reynolds number is first discovered.
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页码：734 / 736
页数：2
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