Interaction between Supersonic Cavity Flow and Streamwise Vortices for Supersonic Mixing Enhancement

2015 ◽  
Author(s):  
Takakage Arai ◽  
Sosuke Sugano ◽  
Shoji Sakaue
Keyword(s):  
Cavity Flow ◽  
Mixing Enhancement ◽  
Streamwise Vortices ◽  
Supersonic Mixing ◽  
Supersonic Cavity

Flow structures of a lobed mixer and effects of streamwise vortices on mixing enhancement

2019 ◽  
Vol 31 (6) ◽  
pp. 066102 ◽  
Author(s):  
Xin-xin Fang ◽  
Chi-bing Shen ◽  
Ming-bo Sun ◽  
Richard D. Sandberg ◽  
Peng Wang
Keyword(s):  
Flow Structures ◽  
Mixing Enhancement ◽  
Streamwise Vortices

Control of Pressure Oscillations Induced by Supersonic Cavity Flow

AIAA Journal ◽  
2020 ◽  
Vol 58 (5) ◽  
pp. 2070-2077 ◽  
Author(s):  
Wang Xiansheng ◽  
Yang Dangguo ◽  
Liu Jun ◽  
Zhou Fangqi
Keyword(s):  
Cavity Flow ◽  
Pressure Oscillations ◽  
Supersonic Cavity

Influence of Micro-Lobed Burner on the Non-Premixed Combustion of Methane and Oxygen

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Yi Xie ◽  
Chuan-li Yi
Keyword(s):  
Mass Fraction ◽  
Equivalence Ratio ◽  
Premixed Combustion ◽  
Maximum Temperature ◽  
Mixing Enhancement ◽  
Combustion System ◽  
Streamwise Vortices ◽  
Maximum Temperature Difference ◽  
Burner Exit ◽  
Combustion Enhancement

Abstract Non-premixed combustion was implemented in a micro-lobed combustion system, and its influence on combustion was studied using both experiments and simulations. The results show that a micro-lobed burner produces streamwise vortices with intensities that increase with the equivalence ratio of methane to oxygen (Φ). Due to the streamwise vortices and the increment of the contact area between methane and oxygen, the gasses mix well in the micro-lobed burner, giving it a larger OH mass fraction and higher temperatures than the micro-splitter burner. Moreover, the equivalence ratio greatly influences the combustion enhancement from the micro-lobed burner, especially near the burner exit. The maximum temperature difference between the two micro-burners at the Z/D = 0.01 cross section is 171 K, when Φ is 0.6. However, when the mixing enhancement caused by the streamwise vortices disappears, Φ has little influence on the combustion temperature of the micro-lobed burner, especially when Φ ≥ 1. In this case, the maximum temperature variation between the micro-lobed burner and micro-splitter burner remains nearly constant.

602 Supersonic Mixing Enhancement Using Interaction between Jet and Flexible Rubber Sheets

2007 ◽  
Vol 2007.56 (0) ◽  
pp. 273-274
Author(s):  
Shohei YAMASHITA ◽  
Yohei YOSHIDA ◽  
Kazuhiko YOKOTA ◽  
Motoyuki ITOH ◽  
Shinji TAMANO
Keyword(s):  
Mixing Enhancement ◽  
Supersonic Mixing

scholarly journals A LES Study on Passive Mixing in Supersonic Shear Layer Flows Considering Effects of Baffle Configuration

2014 ◽  
Vol 6 ◽  
pp. 836146 ◽  
Author(s):  
Ren Zhao-Xin ◽  
Wang Bing
Keyword(s):  
Pressure Loss ◽  
Total Pressure ◽  
Large Scale ◽  
Mixing Layer ◽  
Total Pressure Loss ◽  
Mixing Efficiency ◽  
Mixing Enhancement ◽  
Supersonic Mixing ◽  
Passive Mixing ◽  
Supersonic Mixing Layer

Under the background of dual combustor ramjet (DCR), a numerical investigation of supersonic mixing layer was launched, focused on the mixing enhancement method of applying baffles with different geometric configurations. Large eddy simulation with high order schemes, containing a fifth-order hybrid WENO compact scheme for the convective flux and sixth-order compact one for the viscous flux, was utilized to numerically study the development of the supersonic mixing layer. The supersonic cavity flow was simulated and the cavity configuration could influence the mixing characteristics, since the impingement process of large scale structures formed inside the cavity could raise the vorticity and promote the mixing. The effect of baffle's configurations on the mixing process was analyzed by comparing the flow properties, mixing efficiency, and total pressure loss. The baffle could induce large scale vortexes, promote the mixing layer to lose its stability easily, and then lead to the mixing efficiency enhancement. However, the baffle could increase the total pressure loss. The present investigation could provide guidance for applying new passive mixing enhancement methods for the supersonic mixing.

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