Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response

Woong-Sup Yoon, Gil Yong Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Theoretical-numerical analysis of wave instabilities is conducted with parametric response function. Fluctuating instantaneous burning rate functionally coupled with pressure fluctuations with phase lag is assumed to examine the validity of the method. With sufficiently large amplitude and less phase lag to perturbation, combustion response is resonant to pressure waves, unstable waves are amplified, and the system is driven to instability. Magnitude of response is a crucial instability parameter in the determination of a stability boundary. make a critical change of balancing conditions between the amplifying and damping acoustic energies. In the in-phase regime, the unstable waves are amplified, whereas, the acoustic waves are attenuated in the out-of-phase regime. In the intermediate regime, no distinct tendency of unstable waves was determined.

Original languageEnglish
Title of host publication41st Aerospace Sciences Meeting and Exhibit
Publication statusPublished - 2003 Dec 1
Event41st Aerospace Sciences Meeting and Exhibit 2003 - Reno, NV, United States
Duration: 2003 Jan 62003 Jan 9

Publication series

Name41st Aerospace Sciences Meeting and Exhibit

Other

Other41st Aerospace Sciences Meeting and Exhibit 2003
CountryUnited States
CityReno, NV
Period03/1/603/1/9

Fingerprint

combustion stability
combustion
time lag
burning rate
acoustics
acoustic wave
elastic waves
damping
numerical analysis
Numerical analysis
tendencies
Damping
Acoustics
perturbation
Acoustic waves
energy

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Yoon, W-S., & Lee, G. Y. (2003). Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response. In 41st Aerospace Sciences Meeting and Exhibit (41st Aerospace Sciences Meeting and Exhibit).
Yoon, Woong-Sup ; Lee, Gil Yong. / Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response. 41st Aerospace Sciences Meeting and Exhibit. 2003. (41st Aerospace Sciences Meeting and Exhibit).
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abstract = "Theoretical-numerical analysis of wave instabilities is conducted with parametric response function. Fluctuating instantaneous burning rate functionally coupled with pressure fluctuations with phase lag is assumed to examine the validity of the method. With sufficiently large amplitude and less phase lag to perturbation, combustion response is resonant to pressure waves, unstable waves are amplified, and the system is driven to instability. Magnitude of response is a crucial instability parameter in the determination of a stability boundary. make a critical change of balancing conditions between the amplifying and damping acoustic energies. In the in-phase regime, the unstable waves are amplified, whereas, the acoustic waves are attenuated in the out-of-phase regime. In the intermediate regime, no distinct tendency of unstable waves was determined.",
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Yoon, W-S & Lee, GY 2003, Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response. in 41st Aerospace Sciences Meeting and Exhibit. 41st Aerospace Sciences Meeting and Exhibit, 41st Aerospace Sciences Meeting and Exhibit 2003, Reno, NV, United States, 03/1/6.

Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response. / Yoon, Woong-Sup; Lee, Gil Yong.

41st Aerospace Sciences Meeting and Exhibit. 2003. (41st Aerospace Sciences Meeting and Exhibit).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Theoretical-numerical analysis of wave instabilities is conducted with parametric response function. Fluctuating instantaneous burning rate functionally coupled with pressure fluctuations with phase lag is assumed to examine the validity of the method. With sufficiently large amplitude and less phase lag to perturbation, combustion response is resonant to pressure waves, unstable waves are amplified, and the system is driven to instability. Magnitude of response is a crucial instability parameter in the determination of a stability boundary. make a critical change of balancing conditions between the amplifying and damping acoustic energies. In the in-phase regime, the unstable waves are amplified, whereas, the acoustic waves are attenuated in the out-of-phase regime. In the intermediate regime, no distinct tendency of unstable waves was determined.

AB - Theoretical-numerical analysis of wave instabilities is conducted with parametric response function. Fluctuating instantaneous burning rate functionally coupled with pressure fluctuations with phase lag is assumed to examine the validity of the method. With sufficiently large amplitude and less phase lag to perturbation, combustion response is resonant to pressure waves, unstable waves are amplified, and the system is driven to instability. Magnitude of response is a crucial instability parameter in the determination of a stability boundary. make a critical change of balancing conditions between the amplifying and damping acoustic energies. In the in-phase regime, the unstable waves are amplified, whereas, the acoustic waves are attenuated in the out-of-phase regime. In the intermediate regime, no distinct tendency of unstable waves was determined.

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Yoon W-S, Lee GY. Hybrid model of high-frequency combustion instabilities with pressure- and velocity-coupled response. In 41st Aerospace Sciences Meeting and Exhibit. 2003. (41st Aerospace Sciences Meeting and Exhibit).