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首页> 外文会议>ASME turbo expo >TIME RESOLVED SIMULATION AND EXPERIMENTAL VALIDATION OF THE FLOW IN AXIAL SLOT CASING TREATMENTS FOR TRANSONIC AXIAL COMPRESSORS
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TIME RESOLVED SIMULATION AND EXPERIMENTAL VALIDATION OF THE FLOW IN AXIAL SLOT CASING TREATMENTS FOR TRANSONIC AXIAL COMPRESSORS

机译：用于跨音轴向压缩机轴向槽壳体处理中流动的时间解决和实验验证

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Building on the experience of previous investigations, a casing treatment was developed and applied to an axial transonic compressor stage, in literature referred to as Darmstadt Rotor 1. The aerodynamics of the experimental compressor stage was improved by applying axially orientated semicircular slots to the original plain casing, which both enhanced the operating range and design point efficiency. A gain in total pressure ratio along the entire design speed line was also observed. Within the scope of this study four different axial casing treatments were designed. Their effect on the flow in a transonic axial compressor stage was investigated parametrically using time-resolved 3D-FANS simulations with a mesh of approximately 4.8 · 10~6 grid points. This research aims to identify correlations between the geometrical cavity design and the changed channel flow. The findings help to formulate parameters for evaluating the performance of casing treatments. These criteria can further be used as target functions in the design optimisation process. The predicted behaviour of the transonic compressor was validated against experiments as well as an alternative numerical model, the non-linear harmonic method. Both confirmed the effect of the slots in raising efficiency as well as moving the design speed line towards higher pressure ratios. In the experiments, the addition of the slots increased the total pressure ratio at stall conditions by more than 5% and reduced mass flow from 87.5% of the design mass flow to less than 77.5% compared to the original geometry.
机译：建立在先前调查的经验中，开发了一种套管处理并将其应用于轴向跨音速压缩机阶段，在文献中被称为Darmstadt转子1.通过将轴向定向的半圆形槽施加到原始平原上的实验压缩机阶段的空气动力学提高套管，两者都增强了操作范围和设计点效率。还观察到沿整个设计速度线的总压力比的增益。在本研究的范围内，设计了四种不同的轴向套管处理。它们在跨音速轴向压缩机级上的流动效果，使用时间分辨3D-FANS模拟具有约4.8·10个-6网格点的网格参数化的影响。该研究旨在识别几何腔设计与改变的通道流之间的相关性。调查结果有助于制定评估套管处理性能的参数。这些标准可以进一步用作设计优化过程中的目标函数。跨音速压缩机的预测行为进行了验证实验对以及替代数值模型，非线性谐波方法。既证实在提高效率以及移动所述设计速度线朝着更高的压力比槽的效果。在实验中，在加入时隙的超过5％增加到在失速状态中的总压力比，并与原始几何降低的质量流从设计质量流量的87.5％以上且小于77.5％。

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