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《Power Engineering》 1990-05
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Determination of Cavitation Property of Variable Speed Feedwater Pumps with Guide Wheels

Hu Hong-hua, Ma Wen-zhi,  
From the viewpoint of cutting down the elevation of the deaerator and to comply with the sliding pressure operation requirements, the paper advises to resort to variable speed feedwater pumps with guide wheels in order to cut the required NPSH margin of the pump. The matching test of six guide wheels (with different design parameters) with a 100 D 16 type multistage centrifugal pump showed that the best combination among those tested can cut the necessary NPSH margin to one fifth its original value, increase pump efficiency by 6% and expand operation range by 24.6%.
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