Numerical Analysis of a Model Scramjet Engine with Two Intake Side Walls and a Cavity Flame-Holder

2011 ◽  
Author(s):  
Hyo-Won Yeom ◽  
BongGyun Seo ◽  
Hong-Gye Sung
Keyword(s):  
Numerical Analysis ◽  
Flame Holder ◽  
Side Walls ◽  
Scramjet Engine

Overview of Fuel Injection Techniques for Scramjet Engines

2011 ◽  
Author(s):  
Wei Huang ◽  
Zhen-guo Wang ◽  
Shi-bin Luo ◽  
Jun Liu ◽  
Zhi-xun Xia ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Mixing Efficiency ◽  
Injection Technique ◽  
Ongoing Research ◽  
Hypersonic Propulsion ◽  
Flame Holder ◽  
Flow Field Characteristics ◽  
Injection Techniques ◽  
Scramjet Engine ◽  
Scramjet Engines

As one of the most promising hypersonic propulsion systems for hypersonic vehicles, the scramjet engine has drawn an ever increasing attention of researchers worldwide. At present, one of the most important issues to be dealt with is how to improve the fuel penetration and mixing efficiency and make the flame stable in supersonic flows. Further, how to reduce the structural weight of the engines is an urgent issue that needs to be considered. The ongoing research efforts on fuel injection techniques in the scramjet engine are described, mainly the cavity flame holder, the backward facing step, the strut injection and the cantilevered ramp injection, and the flow field characteristics and research efforts related to these fuel injection techniques are summarized and compared. Finally, a promising fuel injection technique is discussed, namely a combination of different injection techniques, and the combination of the cantilevered ramp injector and the cavity flame holder is proposed. This is because it can not only stabilize the flame, but also shorten the length of the combustor, thus lighten the weight of the scramjet engines.

The Analysis of Multistage Deep Drawing of AA5754 Aluminum Alloy

2010 ◽  
Vol 55 (4) ◽  
pp. 1173-1184 ◽  
Author(s):  
M. Paćko ◽  
M. Dukat ◽  
T. Śleboda ◽  
M. Hojny
Keyword(s):  
Aluminum Alloy ◽  
Numerical Analysis ◽  
Numerical Simulations ◽  
Contact Surface ◽  
Deep Drawing ◽  
Material Flow ◽  
Drawing Process ◽  
Deep Drawing Process ◽  
Side Walls ◽  
Good Agreement

The Analysis of Multistage Deep Drawing of AA5754 Aluminum AlloyThis work is focused on the multistage deep drawing of AA5754 aluminum alloy box-type part with flange. Both experimental and numerical analysis were performed in this study to predict causes of contraction and cracking occurring in deformed product in respect to the changes of friction conditions on tool-drawn part contact surface. The numerical simulations were performed using eta/DYNAFORM software and LS-DYNA® solver. The research showed, that the results of the simulation are in very good agreement with the results of the real multistage deep drawing processes. Moreover, this study showed, that proper conditions of friction on the tool-drawpiece contact surface is crucial for the correctness of the analyzed deep drawing process. Too large friction can restrict the material flow, particularly along the edge connecting the bottom and side-walls of the drawpiece, causing wrinkling and cracking.

Numerical Analysis of a Scramjet Engine with Intake Sidewalls and Cavity Flameholder

AIAA Journal ◽  
2013 ◽  
Vol 51 (7) ◽  
pp. 1566-1575 ◽  
Author(s):  
Hyo-Won Yeom ◽  
Bong-Gyun Seo ◽  
Hong-Gye Sung
Keyword(s):  
Numerical Analysis ◽  
Scramjet Engine

Comparative studies on scramjet engine drag by experiments and numerical analysis

1998 ◽  
Author(s):  
Y. Igarashi ◽  
K. Nakahashi ◽  
M. Kodera ◽  
T. Mitani ◽  
T. Shimura
Keyword(s):  
Numerical Analysis ◽  
Comparative Studies ◽  
Scramjet Engine
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