The conventional fully partitioned pocket damper seal (FPDS) was improved by introducing several nozzles on the first seal tooth, which generates a reverse injection fluid suppressing the cavity flow in the circumferential direction. Computational fluid dynamics (CFD) models of the conventional FPDS and current novel FPDS were established. An infinitesimal theory was employed to identify the rotordynamic coefficient of the FPDS. The influence of nozzle types (negative, straight, positive), inlet/outlet areas, deflection angles (θ) on the rotordynamic performance was comprehensively analyzed. It was found that reducing the circumferential flow in the first seal cavity is crucial for increasing the stability of the FPDS. A negative nozzle angle can restrict the circumferential flow effectively and significantly improve the effective damping and system stability. The crossover frequency for the novel FPDS with θ = −10° is ∼62 Hz, which is much lower than that for the conventional FPDS (∼85 Hz). The increasing inlet/outlet area ratio of the nozzle can also enhance the seal stability. Increasing the negative nozzle angle (θ = none, −10°, −15°, −20°) can effectively increase the effective damping and reduce the crossover frequency from ∼85 Hz to ∼38 Hz. However, the novel FPDS with three kinds of nozzles shows a slight increase (< 2.5 %) in the leakage flow rate compared with the conventional FPDS.

通过在第一个密封齿上引入多个喷嘴，改进了传统的全分隔袋式阻尼器密封 (FPDS)，这会产生反向喷射流体，抑制圆周方向的腔体流动。建立了传统 FPDS 和当前新型 FPDS 的计算流体动力学 (CFD) 模型。采用无穷小理论来确定 FPDS 的转子动力系数。喷嘴类型（负、直、正）、入口/出口面积、偏转角（θ）的影响)对转子动力性能进行了综合分析。发现减少第一密封腔中的周向流动对于增加 FPDS 的稳定性至关重要。负喷嘴角度可以有效限制周向流动，显着提高有效阻尼和系统稳定性。θ = -10°的新型 FPDS 的交叉频率为~ 62 Hz，远低于传统 FPDS（~85 Hz）的交叉频率。增加喷嘴的入口/出口面积比也可以增强密封稳定性。增加负喷嘴角度（θ= none, -10°, -15°, -20°) 可以有效地增加有效阻尼并将交叉频率从~85 Hz 降低到~38 Hz。然而，与传统的 FPDS 相比，具有三种喷嘴的新型 FPDS 的泄漏流量略有增加（< 2.5%）。