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ACTIVE INSTABILITY CONTROL EFFECTIVENESS IN A LIQUID FUELED COMBUSTOR

机译:液体燃烧器的主动失稳控制效率

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This note describes active instability control experiments in a high pressure, Jet A-fueled combustor that were performed to improve understanding of the factors limiting control performance. A set of experiments were performed where the desired level of instability amplitude suppression was systematically increased. The controller effectively drove the instability amplitude to the desired levels down to approximately 15% of those without control. Attempts to further drive the oscillations to a lower level resulted in deterioration in performance, manifested by a "peak splitting" phenomenon. Experiments were also performed at two conditions where the linear and nonlinear characteristics of the self-excited oscillations were varied. They show that the combustor's nominal dynamics (i.e., without control) has an important impact upon active control system effectiveness.
机译:本说明描述了在高压,Jet A燃料燃烧器中进行的主动不稳定性控制实验,旨在提高对限制控制性能的因素的理解。进行了一组实验,其中系统地增加了所需的不稳定幅度抑制水平。控制器有效地将不稳定性幅度降低到所需水平,降至不进行控制的情况下的大约15%。试图进一步将振荡驱动到较低水平会导致性能下降,这表现为“峰值分裂”现象。还在两个条件下进行了实验,其中自激振荡的线性和非线性特性发生了变化。他们表明,燃烧室的标称动力学(即无控制)对主动控制系统的有效性有重要影响。

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