Fig. 1. The simplified model of combustor with backward facing step.带后向台阶的燃烧室简化模型

Fig. 2. Verification of computation model^[19]. 计算模型验证^[19]

Fig. 3. Phase diagram after phase space reconstruction and Poincaré section.相空间重构后的相图及庞加莱截面

Fig. 4. Initial time series of pressure ratios under different initial disturbances.不同初始扰动下压力比的初始时间序列

Fig. 5. Maximum and minimum pressure ratios at different . 不同 下的压力比的最大值和最小值

Fig. 6. Partial enlargement of Fig. 5. 图5的局部放大图

Fig. 7. time series of O₁, O₂, O₃, O₄, O₅, O₆: (a) u₀ = 5.50; (b) u₀ = 6.25; (c) u₀ = 7.50; (d) u₀ = 9.50; (e) u₀ = 12.75; (f) u₀ = 19.25 O₁, O₂, O₃, O₄, O₅, O₆的 时间序列　(a) u₀ = 5.50; (b) u₀ = 6.25; (c) u₀ = 7.50; (d) u₀ = 9.50; (e) u₀ = 12.75; (f) u₀ = 19.25

Fig. 8. time series of S₁, S₂, S₃, S₄, S₅, O₇. S₁, S₂, S₃, S₄, S₅, O₇的 时间序列

Fig. 9. Vortex-acoustic frequency locking.涡声锁频

Fig. 10. The relationship between and and the change of with . 与 的关系及 随 的变化图

Fig. 11. - phase diagram at six different frequency ratios: (a) f_s/f_p = 0.1430; (b) f_s/f_p = 0.1669; (c) f_s/f_p = 0.2003; (d) f_s/f_p = 0.2500; (e) f_s/f_p = 0.3330; (f) f_s/f_p = 0.4999. 6个不同频率比下的 - 相图　(a) f_s/f_p = 0.1430; (b) f_s/f_p = 0.1669; (c) f_s/f_p = 0.2003; (d) f_s/f_p = 0.2500; (e) f_s/f_p = 0.3330; (f) f_s/f_p = 0.4999