Effect of Ingested Boundary Layer on Scramjet Engines' Thrust and Combustion Characteristics

2003 ◽  
Author(s):  
Tetsuo Hiraiwa ◽  
Takeshi Kanda ◽  
Masatoshi Kodera ◽  
Toshihito Saito ◽  
Kan Kobayashi ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Combustion Characteristics ◽  
Scramjet Engines

Combustion Characteristics of Ethylene in Scramjet Engines

2002 ◽  
Vol 18 (3) ◽  
pp. 716-718 ◽  
Author(s):  
A. A. Taha ◽  
S. N. Tiwari ◽  
T. O. Mohieldin
Keyword(s):  
Combustion Characteristics ◽  
Scramjet Engines

Combustion Characteristics of Methane Hydrate in a Laminar Boundary Layer

2009 ◽  
Vol 23 (3) ◽  
pp. 1445-1449 ◽  
Author(s):  
Yuki Nakamura ◽  
Ryoji Katsuki ◽  
Takeshi Yokomori ◽  
Ryo Ohmura ◽  
Masahiro Takahashi ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Laminar Boundary Layer ◽  
Methane Hydrate ◽  
Combustion Characteristics

Boundary-Layer Control in Mach 4 and Mach 6 Scramjet Engines

2005 ◽  
Vol 21 (4) ◽  
pp. 636-641 ◽  
Author(s):  
Tohru Mitani ◽  
Noboru Sakuranaka ◽  
Sadatake Tomioka ◽  
Kan Kobayashi
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Control ◽  
Scramjet Engines ◽  
Layer Control

scholarly journals Three-Component Force Measurements for Scramjet Engines 2) Effects of External Flow and Boundary Layer Ingestion

2003 ◽  
Vol 51 (592) ◽  
pp. 252-259 ◽  
Author(s):  
Tohru Mitani ◽  
Yuichi Tarukawa ◽  
Muneo Izumikawa ◽  
Syuichi Watanabe ◽  
Takashi Shimura
Keyword(s):  
Boundary Layer ◽  
External Flow ◽  
Force Measurements ◽  
Scramjet Engines ◽  
Component Force

Flame Holding and Combustion Characteristics of a Geometrical Flame Holder

2008 ◽  
Author(s):  
K. A. Ahmed ◽  
D. J. Forliti
Keyword(s):  
Boundary Layer ◽  
High Speed ◽  
Equivalence Ratio ◽  
Recirculation Zone ◽  
Combustion Products ◽  
Flame Stabilization ◽  
Combustion Characteristics ◽  
Bluff Bodies ◽  
Trailing Edge ◽  
Flame Holder

Flame Stabilization in a high-speed premixed environment requires the presence of a mechanism to stabilize the flame. Bluff bodies or geometrical flame holders introduce a recirculation zone that anchor the flame. The current study considers the influence of equivalence ratio and the boundary layer state at the trailing edge of the flame holder on the flowfield and combustion characteristics. It was found that the recirculation zone is shortened as the equivalence ratio increases towards unity. A secondary shear region emerges downstream of the recirculation zone and is caused by the accelerated low-density combustion products. The emergence of the secondary shear region moves upstream with increasing equivalence ratio. Tripping the boundary layer causes a dramatic reduction in the length of the recirculation zone, and the secondary shear region is greatly augmented. Visualizations show that tripping the boundary layer resulted in a greatly disturbed flame near the trailing edge and large flame scales. Flowfield measurements suggest that the heat release is increased by approximately 50% when the boundary layer tripped.

Effects of continental boundary layer evolution, convection, turbulence and entrainment, on aerosol formation

Tellus B ◽  
2001 ◽  
Vol 53 (4) ◽  
pp. 441-461 ◽  
Author(s):  
E. D. NILSSON ◽  
Ü. RANNIK ◽  
M. KULMALA ◽  
G. BUZORIUS ◽  
C. D. O'DOWD
Keyword(s):  
Boundary Layer ◽  
Aerosol Formation
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