Numerical Study on Airflow/Jet Mixing Enhancement by Pseudo-Shock Wave System

2010 ◽  
Author(s):  
Teruo Kobayashi ◽  
Akiko Matsuo ◽  
Sadatake Tomioka ◽  
Muneo Izumikawa
Keyword(s):  
Shock Wave ◽  
Numerical Study ◽  
Mixing Enhancement ◽  
Wave System ◽  
Jet Mixing

Study of Correctly Expanded Sonic Jet with Air Tabs

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Arun Prasad R ◽  
Thanigaiarasu S ◽  
Sembaruthi M ◽  
Rathakrishnan E
Keyword(s):  
Numerical Study ◽  
Cross Sectional ◽  
Potential Core ◽  
Convergent Nozzle ◽  
Jet Mixing ◽  
Pressure Profiles ◽  
Constant Diameter ◽  
Sonic Jet ◽  
Sectional Shape ◽  
Length Reduction

AbstractThe present numerical study is to understand the effect of air tabs located at the exit of a convergent nozzle on the spreading and mixing characteristics of correctly expanded sonic primary jet. Air tabs used in this study are two secondary jets issuing from constant diameter tubes located diametrically opposite at the periphery of the primary nozzle exit, normal to the primary jet. Two air tabs of Mach numbers 1.0 to 1.4, in steps of 0.1 are considered in this study. The mixing modification caused by air tabs are analysed by considering the mixing of uncontrolled (free) primary jet as a reference. Substantial enhancement in jet mixing is achieved with Mach 1.4 air tabs, which results in 80 % potential core length reduction. The total pressure profiles taken on the plane (YZ) normal to the primary jet axis, at various locations along the primary jet centreline revealed the modification of the jet cross sectional shape by air tabs. The stream-wise vortices and bifurcation of the primary jet caused by air tabs are found to be the mechanism behind the enhanced jet mixing.

Numerical Study of the Shock Wave Propagation in a Micron-Scale Contracting Channel

2011 ◽  
Author(s):  
G. V. Shoev ◽  
Ye. A. Bondar ◽  
D. V. Khotyanovsky ◽  
A. N. Kudryavtsev ◽  
G. Mirshekari ◽  
...  
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Numerical Study ◽  
Shock Wave Propagation
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