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在求解多级叶轮机械流场的定常计算方法中,ADAMCZYK提出的通道平均方法比混合界面方法更为严格也更为复杂,方程中的确定应力项反映了级环境下流场非定常性的时均效应。然而,与雷诺平均方程一样,通道平均方程本身也没包含足够的信息来确定它的解。基于简化的通道平均方程,建立适合离心压缩机动静相干非定常的半经验确定应力模型,替代重叠区域方法来计算确定应力的方法,结合界面处理方法,发展预测离心压缩机级环境下包含动/静相干周期性非定常流场的时均效应的定常计算方法。采用确定应力模型及混合界面两种方法对两台离心压缩机级内的流场进行计算,两种方法计算时间相当。与混合界面方法相比,由于考虑了非定常流动的时均效应,确定应力模型方法得到的流场分布与试验测量更加吻合;而且确定应力的引入在一定程度上能补偿“人工掺混”带来的影响,采用确定应力模型能够得到更真实的流场。
In solving the steady-state calculation of multi-stage impeller mechanical flow field, the channel averaging method proposed by ADAMCZYK is more rigorous and more complex than the hybrid interface method. The determined stress term in the equation reflects the unsteady flow field in a class environment All effects. However, like the Reynolds-averaged equation, the channel-average equation itself does not contain enough information to determine its solution. Based on the simplified channel averaging equation, a semi-empirically determined stress model suitable for the dynamic and static coherence of centrifugal compressors is established, and a method for calculating and determining stress instead of overlapping regions is established. Combined with the interface processing method, THE STOCHASTIC CALCULATING METHOD OF TIME - AVERAGE EFFECTS OF STATIC AND NEARLY STATIC UNSTEADY STATIC FLOW. The flow field in the two centrifugal compressor stages is calculated by two methods: the determination of stress model and the hybrid interface. The calculation time of the two methods is equivalent. Compared with the mixed interface method, the flow field distribution determined by the stress model method is more consistent with the experimental measurement due to the time-averaged effect of unsteady flow, and the introduction of stress can compensate for the “artificial blending” "The impact of using the stress model can be obtained more realistic flow field.