Combustion Stability Boundaries of the Subscale Rocket Chamber with Impinging Jet Injectors
| Autor: | Woo Seok Seol, Valery P. Pikalov, Alexander A. Shibanov, Chae Hoon Sohn |
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| Rok vydání: | 2007 |
| Předmět: |
Jet (fluid)
Materials science business.product_category business.industry Liquid-propellant rocket Mechanical Engineering Aerospace Engineering Mechanics Injector Structural engineering Combustion Instability Chamber pressure law.invention Fuel Technology Rocket Space and Planetary Science law Hydrodynamic theory business |
| Zdroj: | Journal of Propulsion and Power. 23:131-139 |
| ISSN: | 1533-3876 0748-4658 |
| DOI: | 10.2514/1.19937 |
| Popis: | Combustion stability boundaries are investigated experimentally using a subscale chamber for screening the split-triplet impinging jet injectors of a liquid propellant rocket engine. Geometrical dimensions and operating conditions of the subscale chamber are determined using the scaling methods proposed in the previous works. From the experimental tests, two major instability regions are identified by the parameters of combustion-chamber pressure and mixture (oxidizer/fuel) ratio. A key instability mechanism can be explained by the correlation between the characteristic burning or mixing time and the characteristic acoustic time. In each instability region, the dynamic behavior of the flame is. investigated to verify the characteristic lengths of the jet injectors derived from hydrodynamic theory. It is found that pressure oscillations with large amplitude are generated by lifted-off flames. Stability margins are evaluated as a function of the impingement angle and thereby, the optimum angle is identified. |
| Databáze: | OpenAIRE |
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