Active control of nonlinear pressure oscillations in combustion chambers

Youn Tih Fung, Vigor Yang

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

A theoretical analysis of active control of nonlinear acoustic instabilities in combustion chambers is developed in this article. The formulation starts with a generalized wave equation that describes the dynamic behavior of second-order nonlinear oscillations with distributed feedback actions. Control inputs are provided by the burning of the injected seconday fuel in the chamber, with its instantaneous mass flow rate modulated by a proportionalplus- integral (PI) controller located between the pressure sensor and the fuel injection mechanism. Various nonlinear stability characteristics, including the existence and stability of limit cycles, are studied analytically using the method of time averaging. In addition, an optimization procedure is developed for selecting controller gains.

Original languageEnglish
Pages (from-to)1282-1289
Number of pages8
JournalJournal of Propulsion and Power
Volume8
Issue number6
DOIs
Publication statusPublished - 1992

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

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