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针对矩形并联通道,基于Galerkin Nodal法建立了升潜条件下并联通道流动不稳定性分析集总参数模型,包括静止条件下并联通道流动不稳定性模型和升潜条件附加力模型,并基于此模型分析了升潜条件下并联通道流动不稳定性的影响。分析结果表明:升潜幅值对并联通道流动不稳定性影响不明显。当升潜加速度频率与系统脉动频率差别较大时,升潜加速度频率对界限功率影响不大;当升潜加速度频率与系统脉动频率相近时,会显著降低系统界限功率;当系统处于非对称工况时,升潜条件的影响将显著增强。
Based on the Galerkin Nodal method, a lumped parameter model for the analysis of flow instability in parallel passages under rising conditions is established, including the model of flow instability in parallel channels and the additional force model of rising conditions based on Galerkin Nodal method. The influence of the flow instability of the parallel passage under the condition of rising potential is analyzed. The analysis results show that: the rise of amplitude has no obvious influence on the flow instability of the parallel passage. When the difference between the rising frequency and the system pulsation frequency is large, the frequency of the rising acceleration has little effect on the limiting power. When the rising acceleration frequency is close to the system pulsation frequency, the system boundary power will be significantly reduced. When the system is in an asymmetric Conditions, the impact of lifting conditions will be significantly enhanced.