Mixing Characteristics of Fuel Injection in Supersonic Combustor Considering Upstream Streamwise Vortices

2017 ◽  
Author(s):  
Jian Teng ◽  
Xunhuang Zhou ◽  
Yi-qing Li ◽  
Yancheng You
Keyword(s):  
Fuel Injection ◽  
Streamwise Vortices ◽  
Mixing Characteristics

Mixing Characteristics in a Supersonic Combustor with Gaseous Fuel Injection Upstream of a Cavity Flameholder

2008 ◽  
Vol 82 (2) ◽  
pp. 271-286 ◽  
Author(s):  
Ming-bo Sun ◽  
Hui Geng ◽  
Jian-han Liang ◽  
Zhen-guo Wang
Keyword(s):  
Fuel Injection ◽  
Gaseous Fuel ◽  
Mixing Characteristics

Structural and mixing characteristics influenced by streamwise vortices in supersonic flow

2017 ◽  
Vol 110 (12) ◽  
pp. 124101 ◽  
Author(s):  
Dongdong Zhang ◽  
Jianguo Tan ◽  
Juwei Hou
Keyword(s):  
Supersonic Flow ◽  
Streamwise Vortices ◽  
Mixing Characteristics

Investigation on Mixing Characteristics of Methane Fuel in Low Emission Combustor

2020 ◽  
Author(s):  
Enhui Liu ◽  
Xiao Liu ◽  
Hongtao Zheng ◽  
Jinghe Lu ◽  
Zhihao Zhang ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Recirculation Zone ◽  
Fuel Injection ◽  
Near Field ◽  
Velocity Ratio ◽  
Pollutant Emission ◽  
Windward Side ◽  
Leeward Side ◽  
Low Emission ◽  
Mixing Characteristics

Abstract With the increasingly environmental problems and strict pollutant emission limits, pollutant emission has become a critical consideration for gas turbine. Mixing uniformity index of fuel-air has a significant effect on NOx emission. Previous works conducted basic research on mixing mechanism based on jet in crossflow, while few people studied a single real swirler channel in gas turbine combustor. The present work aims to bridge this gap and investigates the effects of fuel injection from the windward and leeward sides on the fuel concentration distribution and mixing uniformity index, based on a typical radical swirler channel. The qualitative analysis of velocity field and vortices structure and the quantitative analysis of velocity ratio and uniformity index are carried out. Due to the presence of sharp corner at the inlet of swirler, a recirculation zone is formed by the flow separation. The recirculation zone at the leeward side decreases the flow velocity and increases the area and time for fuel-air mixing. The velocity ratio plays a key role in the characteristics of flow and mixing. Under the same inlet conditions, the effective velocity ratio (R = 40) in the near field of the leeward side is about 10 times that of windward side (R = 4), and the maximum jet depth can be achieved in the near field. Therefore, the outlet uniformity index on the windward and leeward sides are 38.85% and 49.43%, respectively. From the perspective of mixing uniformity, fuel injection from the leeward side is beneficial to realize quick mixing in short distance. The present study is expected to provide insightful information for understanding mixing characteristics of methane fuel in low emission combustor.

Numerical Study of Combinations of Strut and Cavity in a Round Supersonic Combustor

2019 ◽  
Vol 36 (3) ◽  
pp. 219-231
Author(s):  
Wenyan Song ◽  
Dongqing Zhang ◽  
Deyong Shi
Keyword(s):  
Fuel Injection ◽  
Numerical Study ◽  
Velocity Curve ◽  
Flow Structures ◽  
Streamwise Vortices ◽  
Nozzle Outlet ◽  
Engine Thrust ◽  
Upward Transport ◽  
Center Ring

Abstract Different strut-cavity configurations and fuel injection patterns employed in a round supersonic combustor are numerically investigated. A new parameter defined as an ideal nozzle outlet velocity is used to evaluate performances of different strut-cavity configurations and fuel injection patterns. This parameter is a reflection of the contribution of the combustor performance to the engine thrust. The peak of the velocity curve stands for the best performance of the combustor. Then the flowfields are discussed in detail. The flow structures indicate that the injection from the wall behind a strut achieves a great penetration because of the strong upward transport that results from the streamwise vortices behind the strut. Results show that the combustor performance and the flowfields are greatly influenced by the fuel injection patterns. The fuel injections from the strut sides and from the center ring achieve the better performances than that from the wall behind the struts.

ATOMIZATION CHARACTERISTICS OF AIRBLAST FUEL INJECTION INSIDE A VENTURI TUBE

1997 ◽  
Vol 7 (3) ◽  
pp. 245-265 ◽  
Author(s):  
H. Sun ◽  
T.-H. Chue ◽  
R. R. Tacina
Keyword(s):  
Fuel Injection ◽  
Venturi Tube ◽  
Atomization Characteristics
Sign in / Sign up

Export Citation Format

Share Document