Longitudinal combustion instability of a pintle injector for a liquid rocket engine combustor

2018 ◽  
Vol 194 ◽  
pp. 115-127 ◽  
Author(s):  
Kazuki Sakaki ◽  
Tomokazu Funahashi ◽  
Shinji Nakaya ◽  
Mitsuhiro Tsue ◽  
Ryuichiro Kanai ◽  
...  
Keyword(s):  
Rocket Engine ◽  
Combustion Instability ◽  
Liquid Rocket Engine ◽  
Liquid Rocket

scholarly journals Analysis of Tangential Combustion Instability Modes in a LOX/Kerosene Liquid Rocket Engine Based on OpenFOAM

2022 ◽  
Vol 9 ◽  
Author(s):  
Kangkang Guo ◽  
Boqi Xu ◽  
Yongjie Ren ◽  
Yiheng Tong ◽  
Wansheng Nie
Keyword(s):  
Heat Release ◽  
Standing Wave ◽  
Rocket Engine ◽  
Combustion Instability ◽  
Wave Mode ◽  
Acoustic Mode ◽  
Chamber Pressure ◽  
Liquid Rocket Engine ◽  
Operation Condition ◽  
Liquid Rocket

Self-excited high frequency combustion instability (HFCI) of first-order tangential (1T) mode was observed in a staged-combustion LOX/Kerosene liquid rocket engine numerically. Two different kinds of 1T patterns, standing wave mode and traveling wave mode, were captured in the present work. In the nominal operation condition, the ratio of oxygen-to-fuel (O/F) was 2.5. Propellant was evenly distributed in all injectors and no HFCI occurred. The chamber pressure obtained from the numerical simulation and experiment showed a good agreement, which validated the numerical model. When the mass flow of fuel for two injectors was modified, severe HFCI occurred. The pressure wave node was located at a fixed diameter, showing a 1T standing wave mode. As the O/F was set 4.4 and the propellant distribution was completely uniform, the numerical result yielded a 1T wave node featured a spinning behavior, which was a traveling 1T wave mode. Once the HFCI arose, no matter what standing mode or spinning mode, the pressure and heat release oscillated totally in phase temporally and coupled spatially. The heat release from combustion was fed into the resonant acoustic mode. This was the thermoacoustic coupling process that maintained the HFCI.

Effects of self-pulsation on combustion instability in a liquid rocket engine

2020 ◽  
Vol 114 ◽  
pp. 110038 ◽  
Author(s):  
Xiao Bai ◽  
Peng Cheng ◽  
Qinglian Li ◽  
Liyong Sheng ◽  
Zhongtao Kang
Keyword(s):  
Rocket Engine ◽  
Combustion Instability ◽  
Liquid Rocket Engine ◽  
Liquid Rocket
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