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High frequency combustion instability control by discharge plasma in a model rocket engine combustor
- Source :
- Acta Astronautica. 179:391-406
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- To suppress the high frequency combustion instability of rocket engines, quasi-direct current (quasi-DC) discharge plasma is considered in combination with special arrangements in a rocket engine combustor. After establishing an internal reacting flow field model of a rocket combustor and a phenomenological plasma model, the influence of quasi-DC discharge plasma on high frequency combustion instability is numerically investigated. The results show that the characteristics of the high frequency combustion instability in the combustor are captured very well through the simulation. Based on the DES turbulence model, a positive feedback process is clearly observed for the self-excited combustion instability. The mean temperature and pressure of the combustor are not sensitive to the occurrence of quasi-DC discharge plasma. The pressure histories of the combustor and their characteristic oscillating frequencies are not affected by the plasma when only one actuator is in operation. However, the oscillating amplitudes of the pressure are reduced within a certain time when several actuators are in operation. The heat release becomes more diffusive and more eddies form around the injector faceplate with an increasing number of plasma filaments. Mainly through the reduction of local heat release, the plasma is capable of affecting the high frequency combustion instability in the combustor. To better control high frequency combustion instability, the optimal arrangement is a double-plasma filaments with symmetrical actuators.
- Subjects :
- 020301 aerospace & aeronautics
business.product_category
Materials science
Computer simulation
business.industry
Turbulence
Aerospace Engineering
02 engineering and technology
Injector
Plasma
Mechanics
01 natural sciences
law.invention
0203 mechanical engineering
Rocket
law
0103 physical sciences
Combustor
Rocket engine
Current (fluid)
business
010303 astronomy & astrophysics
Subjects
Details
- ISSN :
- 00945765
- Volume :
- 179
- Database :
- OpenAIRE
- Journal :
- Acta Astronautica
- Accession number :
- edsair.doi...........1de1cc616d57ffb109e8ee579721ec95