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A computational and analytical study into the use of counter-flow fluidic thrust vectoring nozzle for small gas turbine engines
, Article Applied Mechanics and Materials ; Vol. 629, issue , 2014 , pp. 97-103 ; ISSN: 16609336 ; Banazadeh, F ; Sharif University of Technology
Abstract
This paper provides an understanding of counter-flow fluidic thrust vectoring, in the presence of the secondary air vacuum, applied to the exhaust nozzle of a micro-jet engine. An analytical and numerical study is performed here on a divergent collar surface adjacent to the cylindrical exhaust duct system. The vectoring angle is controlled by manipulating the momentum flux through a vacuum gap that is located on a circle concentric to the main nozzle. Three dimensional numerical simulations are conducted by utilizing a computational fluid dynamics model with two-equation standard k-ε turbulence model to study the pressure and velocity distribution of internal flow and nozzle geometry....
Influence of the angle of incident shock wave on mixing of transverse hydrogen micro-jets in supersonic crossflow
, Article International Journal of Hydrogen Energy ; Volume 40, Issue 30 , August , 2015 , Pages 9590-9601 ; 03603199 (ISSN) ; Jahanian, O ; Mokhtari, M ; Sharif University of Technology
Elsevier Ltd
2015
Abstract
A three-dimensional numerical study has been performed to investigate the influence of angle of shock waves on sonic transverse Hydrogen micro-jets subjected to a supersonic crossflow. This study focuses on mixing of the Hydrogen jet in a Mach 4.0 crossflow with a global equivalence ratio of 0.5. Flow structure and fuel/air mixing mechanism were investigated numerically. Parametric studies were conducted on the angle of shock wave by using the Reynolds-averaged Navier-Stokes equations with Menter's Shear Stress Transport turbulence model. Complex jet interactions were found in the downstream region with a variety of flow features depending upon the angle of shock incident. These flow...