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The Effect of Size, Location and Pumping Direction of Pitched Blade Turbine Impellers on Flow Patterns: LDA Measurements and CFD Predictions

2001; Elsevier BV; Volume: 79; Issue: 8 Linguagem: Inglês

10.1205/02638760152721406

1876-4800

Z. Jaworski, Kate N. Dyster, Alvin W. Nienow,

Turbomachinery Performance and Optimization

A combined LDA-CFD (MRF method) study has been undertaken of the turbulent flow associated with two sizes of 6-bladed 45° pitch blade turbine at three clearances, either pumping up or down. Good quantitative agreement for mean velocity vectors has been obtained but that for RMS values was poor. The mean discharge angle is more vertical: (a) for the smaller impeller at all clearances; (b) for both sizes when an impeller approaches a surface towards which it is pumping.