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Experiment of flame crossover between main stage and pilot stage under centrifugal force effect in curved duct
Received date: 2013-12-25
Revised date: 2014-07-04
Online published: 2014-09-26
The ram rotor engine is a novel technology combined of ramjet engines and gas turbine engines, having simple configuration. The flame stability and propagation are under strong effects of centrifugal force in the combustor of ram rotor engine. Experimental research work is carried out to study the effects of centrifugal force on the flame crossover between two stages. According to the characteristics of combustion under centrifugal force, a curved duct is used to simulate the centrifugal effect. Tests of flame crossover between pilot stage and main stage are carried out under ambient pressure and temperature, with the inlet air velocity ranging from 10 m/s to 70 m/s. The effects of centrifugal force, fuel allocation proportion and fuel injection initial angle on the flame crossover are investigated in the tests. The results of tests preliminarily verify the feasibility of this combustion scheme and lay a foundation for the research of ram rotor engine combustor.
Key words： centrifugal force; flame crossover; combustor; ignition; lean blowout limit
LI Lin , LIN Yuzhen , ZHANG Chi . Experiment of flame crossover between main stage and pilot stage under centrifugal force effect in curved duct[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(2) : 484 -491 . DOI: 10.7527/S1000-6893.2014.0136
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