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首页> 外文期刊>Thermal engineering >Experimental Studies into the Effect that the Rotor Rotation and Flow Swirling Upstream of Seals Have on the Leakage Flowrate
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Experimental Studies into the Effect that the Rotor Rotation and Flow Swirling Upstream of Seals Have on the Leakage Flowrate

机译：实验研究成了转子旋转和旋转在密封上游的转子旋转和流动对泄漏流量的影响

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Abstract— The results from experiments for studying the effect of rotor rotation on the leakage through different types of seals are presented. It is shown from a comparative study of models involving a stalled rotor and rotor rotating with a 50 Hz frequency that the rotor rotation has hardly any effect on the leakage flowrate, so that the rotation may not be taken into account in calculations of leakage flowrate through the steam turbine end and diaphragm seals. The article presents results from experiments for studying the dependence of leakage flowrate on the flow parameters, namely, the change of the velocity vector axial and circumferential components in the annular inlet channel upstream of a single annular throttle orifice. During the experiments, the velocity axial and circumferential components were varied independently and in a very significant range. The accomplished studies have shown that the change of both the axial and circumferential velocity components has hardly any effect on the leakage flowrate. It can be concluded from an analysis of the obtained results that the influence of flow parameters upstream of the seal on the leakage flowrate is so insignificant that its neglect in the previously developed calculation procedures for determining the leakage flowrate in the steam turbine seals, which are still in use at present, is quite substantiated and justified. At present, studies are being carried out that allow the flow structure in different places of turbine machinery flow paths, including the turbine seals, to be analyzed by calculation. It should be noted that it is possible by using the modern calculation methods not only to determine the vortex structure in the seal neighborhood but also to estimate the leakage flowrate, leakage losses, and even the stage efficiency for different configurations of the chamber upstream of the seal. Nonetheless, care should be taken in dealing with practical recommendations on changing the seal configurations that are based solely on the calculation results. The soundness of such recommendations must be confirmed by the relevant experimental investigations.
机译：摘要 - 提出了研究转子旋转对通过不同类型密封件泄漏的实验的结果。从涉及停滞转子和转子的模型的比较研究中示出了，转子旋转对转子旋转几乎没有对泄漏流量影响，从而在漏流量的计算中可能不会被考虑旋转蒸汽轮机端和隔膜密封件。该物品呈现来自实验的结果，用于研究泄漏流量对流动参数的依赖性，即，在单个环形节流孔的上游的环形入口通道中的速度矢量轴向和周向部件的变化。在实验期间，速度轴向和周向部件独立变化，并且在非常显着的范围内。完成的研究表明，轴向和周向速度分量的变化几乎没有对泄漏流量的影响。从对所得结果的分析中可以得出结论，即在泄漏流量上的密封件上游的流动参数的影响是如此微不足道地在先前开发的计算程序中忽略了用于确定蒸汽轮机密封件中的泄漏流量目前仍然在使用，是非常证实和合理的。目前，正在进行研究，其允许通过计算分析包括涡轮机械流动路径的不同位置的流动结构。应当注意，不仅可以使用现代计算方法，不仅可以确定密封邻域中的涡流结构，而且还可以估计泄漏流量，泄漏损耗，甚至是腔室上游腔室的不同配置的阶段效率。海豹。尽管如此，应在处理完全基于计算结果的密封配置的实用建议时注意。必须通过相关的实验调查确认这些建议的健全性。

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