Active control of oxy-fuel combustion using preflame CO2-injection

摘要: Thermoacoustic instabilities in combustion processes have received considerable of attention recent years. Coupling between heat release from the flame and acoustic, causes large high frequency pressure oscillations that are unwanted. The most promising way to stabilize such a system, is perturb system by injecting small amounts gas close flame. To allow injected mix well with main flow before burning, injector must be placed upstream This introduces an unwanted time delay due transport flame, because unstable oscillations, even delays can problem. In this paper we focus on control low order oxy-fuel model delay. We apply procedure calculate intervals time-delays for which stabilized. useful during design chamber, as it allows us place at optimal location. For model, also gives exact knowledge about how much operating conditions chamber change, controller becomes unable system. Further find tunings handle wide range time-delays, robust toward modeling errors.