Investigating the operation of the high-viscosity liquid leakproof pumps of low specific speed by means of hydrodynamic simulation methods

When the leakproof impeller pumps of low specific speed are operating in the wide range of hydraulic fluid viscosity values their characteristics vary considerably. There are no empirical relations of viscous effects on these characteristics for leakproof impeller pumps. In order to identify these changes we have developed 3D-models of different pumps flow parts; by means of hydrodynamic simulation methods we have obtained the pump characteristics for each model provided the pump is running on high-viscosity liquids. The article summarizes the obtained results in the form of pump head relation coefficients which are used to determine the operational characteristics of the leakproof pump for different working modes. We compare the obtained results with the previously known data.

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