http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
주파수 이조에 의한 다중 연소기 상호작용: 결합확률분포 분석
제갈현욱(Hyunwook Jegal),김규태(Kyu Tae Kim) 한국연소학회 2019 한국연소학회지 Vol.24 No.4
Acoustic interactions between adjacent combustors via a cross-talk section have been investigated in a dual-combustor configuration. Acoustic pressure oscillations measured in two model combustors were used to calculate joint probability distribution functions (JPDF), instantaneous phase differences, and coherence spectra. Using the JPDF analysis, we show that the nature of adjacent combustor interactions can be retrieved by interpreting the distribution patterns. The instantaneous phase angle obtained using the Hilbert transform and the coherence spectra support our interpretation.
제갈현욱(Hyunwook Jegal),김규태(Kyu Tae Kim) 한국연소학회 2020 KOSCOSYMPOSIUM논문집 Vol.2020 No.9
In can-annular gas turbine combustors, the growth of an unstable mode in individual cans is closely related to the coupling of acoustic pressure oscillation and heat release rate perturbation, whereas the interaction mode selection is associated with mutual synchronization and phase dynamics of pressure oscillations in adjacent combustors. Here, we use dynamical system’s theories to evaluate the degree of mutual synchronization between two oscillators.
상호작용하는 다중 모델 가스터빈 연소기의 동조에 의한 위상 고정과 진폭 억제
제갈현욱(Hyunwook Jegal),문기훈(Kihun Moon),구자헌(Jaheon Gu),김규태(Kyu Tae Kim) 한국연소학회 2019 KOSCOSYMPOSIUM논문집 Vol.2019 No.5
In can-annular gas turbine combustion systems, the acoustic interaction between adjacent can combustors gives rise to the formation of a push-push or a push-pull mode. Here we describe experimental observations of mutual synchronization between two combustors, each containing a lean-premixed swirl-stabilized turbulent flame. Our results reveal that the two combustors at different operating conditions synchronizes to oscillate at a common frequency. Mutual synchronization under certain asymmetric inlet boundary conditions however, is found to completely suppress the oscillations.