Optimized Blade Design of Counter-Rotating-Type Pump-Turbine Unit Operating in Pump and Turbine Modes

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/ijrm/volume-2018/6069780/figures/6069780.fig.0015a.svgz" name="6069780.fig.0015a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Pump mode</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/ijrm/volume-2018/6069780/figures/6069780.fig.0015b.svgz" name="6069780.fig.0015b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Turbine mode</td></tr></table>

<div>Variation of the pump and turbine mode efficiencies with flow rate.</div>

International Journal of Rotating Machinery

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Figure 15

Figure 15: Optimized Blade Design of Counter-Rotating-Type Pump-Turbine Unit Operating in Pump and Turbine Modes 