Figure 1
Schematic of open loop trim adjustment active control using tunable Helmholtz resonator.
Figure 2
Schematic mode diagram showing (a) growth rate and (b) frequency (combustion delay and geometric parameters constant).
Figure 3
Nominal thermoacoustic characteristics for duct (1L mode) showing (a) growth rate and (b) frequency.
Figure 4
Nominal thermoacoustic characteristics for duct (3L mode) showing (a) growth rate and (b) frequency.
Figure 5
Thermoacoustic characteristics of a duct (1L mode, xf = 0.10) showing (a) growth rate and (b) frequency.
Figure 6
Thermoacoustic characteristics of a duct (3L mode, xf = 0.10) showing (a) growth rate and (b) frequency.
Figure 7
Thermoacoustic characteristics in a duct as flame position varies (1L mode, τ = 0.6) showing (a) growth rate and (b) frequency.
Figure 8
Thermoacoustic characteristics of a duct as flame position varies (3L mode, τ = 0.6) showing (a) growth rate and (b) frequency.
Figure 9
Nominal thermoacoustic characteristics of a ducted resonator (1L mode, τ = 0.6, xf = 0.10, V = 0.2, ωh = 2, xh = 0.5) showing (a) growth rate and (b) frequency.
Figure 10
Nominal thermoacoustic characteristics of a ducted resonator (3L mode, τ = 0.6, xf = 0.10, V = 0.2, ωh = 2, xh = 0.5) showing (a) growth rate and (b) frequency.
Figure 11
Thermoacoustic characteristics of a ducted resonator as combustion delay varies (1L mode, xf = 0.10, xh = 0.5, V = 0.2, ωh = = 2) showing (a) growth rate and (b) frequency.
Figure 12
Thermoacoustic characteristics of a ducted resonator as combustion delay varies (3L mode, xf = 0.10, xh = 0.5, V = 0.2, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 13
Thermoacoustic characteristics of a ducted resonator: as flame position varies (1L mode, τ = 0.6, xh = 0.5, V = 0.2, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 14
Thermoacoustic characteristics of a ducted resonator as flame position varies (3L mode, τ = 0.6, xh = 0.5, V = 0.2, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 15
Thermoacoustic characteristics of a ducted resonator as volume ratio varies (1L mode, τ = 0.6, xh =0.10, xh = 0.5, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 16
Thermoacoustic characteristics of a ducted resonator as volume ratio variens (3L mode, τ = 0.6, xf = 0.10, xh = 0.5, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 17
Thermoacoustic characteristics of a ducted resonator as resonator position varies (1L mode, τ = 0.6, xf = 0.10, V = 0.2, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 18
Thermoacoustic characteristics of a ducted resonator as resonator position varies (3L mode, τ = 0.6, xf = 0.10, V = 0.2, ωh = 2) showing (a) growth rate and (b) frequency.
Figure 19
Thermoacoustic characteristics of a ducted resonator as resonator frequency varies (1L mode, τ = 0.6, xf = 0.10, xh = 0.5, V = 0.2) showing (a) growth rate and (b) frequency.
Figure 20
Thermoacoustic characteristics of a ducted resonator as resonator frequency varies (3L mode, τ = 0.6, xf = 0.10, xh = 0.5, V = 0.2) showing (a) growth rate and (b) frequency.