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TPS 2020 Virtual Learning

(Virtual) Lecture: Understanding Uncertainties in Viscous Performance Predictions For Centrifugal Pumps

Colorado Springs, CO, USA -- November 23, 2020 -- Scott Lang, Engineering Software Developer for Applied Flow Technology, will present a lecture for the 2020 Virtual Turbomachinery and Pumps Symposia, "Understanding Uncertainties in Viscous Performance Predictions For Centrifugal Pumps."

The course will discuss how accurate predictions of centrifugal pump performance are critical in every fluid industry.

Many industries encounter situations where a fluid more viscous than water must be conveyed with a centrifugal pump. As liquid viscosity increases, losses in the pump increase and degrade its performance. Pumps are nearly always tested only with pure water, meaning some estimation of this performance degradation must be made for pump and motor selection. There are several ways to make this estimation, all of which carry uncertainty.

A widely adopted method is described in ANSI/HI 9.6.7-2015 Rotodynamic Pumps Guideline for Effects of Liquid Viscosity on Performance. Proper application and understanding of the uncertainties in HI 9.6.7-2015 are described here. The analysis herein shows that recent test data falls within reasonable uncertainty levels, and recommendations for pump and motor sizing accounting for these uncertainties are given. Finally, the HI 9.6.7-2015 method correlations are based on trustworthy but limited data a plea to the industry is made to provide the Hydraulic Institute with additional viscous pump measurements for the purposes of continually improving these correlations.

  • 8:45 am - 9:15 am (central time)
  • Tuesday 12/08/2020
  • Scott Lang Engineering Software Developer, Applied Flow Technology

 

  TPS 2020 Information  

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