Numerical Investigations of Unsteady Flow in a Centrifugal Pump with a Vaned Diffuser

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="961580.fig.009a" src="https://static.hindawi.com/articles/ijrm/volume-2013/961580/figures/961580.fig.009a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>  Experimental</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="961580.fig.009b" src="https://static.hindawi.com/articles/ijrm/volume-2013/961580/figures/961580.fig.009b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Unsteady <svg height="12.4375" id="M88" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 33.174999 12.4375" width="33.174999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<table>Experimental and calculated tangential velocities in the radial gap for the unsteady simulation using the <svg height="12.4375" id="M87" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 33.174999 12.4375" width="33.174999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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l5 26q38 4 74 13.5t57 17t25 7.5q12 0 4 -32l-104 -443h2q35 38 97 93q39 35 65.5 56t62 41.5t58.5 20.5q19 0 30.5 -10t11.5 -22z" id="x1D458"></path></g><g transform="matrix(.017,-0,0,-.017,12.387,12.162)"><path d="M535 230h-483v50h483v-50z" id="x2212"></path></g><g transform="matrix(.017,-0,0,-.017,26.139,12.162)"><path d="M387 375q0 -16 -17 -31t-29 -15q-9 0 -12 13q-13 74 -80 74q-36 0 -61 -24.5t-25 -56.5t24 -51.5t68 -19.5q33 0 47 2l2 -7l-32 -42q-20 2 -54 2q-45 0 -74 -21.5t-29 -60.5q0 -41 28 -65.5t73 -24.5q78 0 145 67l17 -23q-33 -47 -84.5 -75t-111.5 -28q-70 0 -114.5 35.5
t-44.5 92.5q0 46 38 78t95 45v2q-35 10 -54.5 33t-19.5 52q0 55 53 88.5t122 33.5q67 0 98.5 -23.5t31.5 -49.5z" id="x1D700"></path></g>
</svg> turbulence model.</table>

International Journal of Rotating Machinery

fig9

Figure 9

Figure 9: Numerical Investigations of Unsteady Flow in a Centrifugal Pump with a Vaned Diffuser 