Research Article
Performance Study of Modified Savonius Water Turbine with Two Deflector Plates
Table 1
Summary of experimental investigation carried out by researchers on Savonius turbines with water as working medium.
| Author | Turbine aspect ratio () | Reynolds number × 105 | Free stream velocity (m/s) | Water tunnel dimensions (m × m) | Orientation of the axis | Turbines tested | Parameters measured | Results |
| Khan et al. [9] | 1.82 | 0.98, 1.52, 1.96 | 1 | | Vertical | Single-stage, two-stage, three-stage conventional Savonius turbines with an overlap ratio of 0.207 | Cp, Ct | of 0.038, 0.049, and 0.04 for single-, two-, and three-stage Savonius turbines |
| Nakajima et al. [10] | 1.48 | 1.1 | 0.8 | | Horizontal | Single-stage conventional Savonius turbine | Cp, flow visualisation | of 0.25 for single-stage Savonius turbine |
| Nakajima et al. [11] | 1.2, 2.4 | 1.1 | 0.8 | | Horizontal | Single-stage and two-stage conventional Savonius turbine with an overlap ratio of 0.36 | Cp, flow visualisation | of 0.275 for two-stage with 90° phase shift compared to 0.25 for single-stage turbine and flow visualisation gives the torque generation mechanism |
| Golecha et al. [12] | 0.70 | 1.32 | 0.45 | | Vertical | Single-stage, two-stage and three-stage modified Savonius turbine with and without deflector plate | Cp, Ct | 50% improvement in the for single-stage modified Savonius with deflector plate at optimal position |
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