Research Article
Experimental and Numerical Investigation of Pressure Fluctuation in a Low-Specific-Speed Centrifugal Pump with a Gap Drainage Impeller
Table 3
Comparison of hydraulic performance of different schemes.
| Flow rate | Schemes | Head H (m) | Efficiency η (%) |
| 0.6Qd | Original model | 84.7 | 19.8 | Model 1 | 81.51 | 19.91 | Model 2 | 79.14 | 20.26 |
| 1.0Qd | Original model | 82.5 | 26.7 | Model 1 | 79.16 | 26.98 | Model 2 | 76.86 | 27.1 |
| 1.4Qd | Original model | 80.6 | 32.3 | Model 1 | 76.88 | 33.51 | Model 2 | 74.87 | 33.56 |
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