Theory Bites: Cavitation/Pumps

Engineering & Design
Theory Bites_ Cavitation Pumps

Theory Bites: Cavitation/Pumps

Theory bites are a collection of basic hydraulic theory and will touch upon pump design and other areas of pump industry knowledge.

Cavitation is the Phase change from liquid to vapor brought about by reducing the local pressure anywhere in a pump below the vapor pressure.

Simply defined, cavitation is the formation of bubbles or cavities in a liquid, developed in areas of relatively low pressure. The imploding or collapsing of these bubbles trigger intense shock waves inside the pump, causing significant damage to the impeller and/or the pump housing.

Cavitation is a significant concern in several application areas, including pumps, inducers, marine propellers, water turbines, and fuel injectors. One of the major problems caused by cavitation is a loss of pressure rise across a pump. Other problems include noise, vibration, and damage to metal components.

The simplest model of cavitation onset requires the local static pressure to drop below the vapor pressure in the fluid being pumped. Although this would be expected to happen principally at the inlet of the first stage, for example in a multistage pump, and while this is generally true, it also can occur at numerous other locations.

Check Stepanoff 1597, Centrifugal and Axial Flow Pumps for more details.

Source: Centrifugal Pump Design and Performance, 1997 D. Japikse

Read more Theory Bites!

Related Articles

Related Whitepapers

Impeller Selection Guide for Submersible Pumps

When selecting a submersible pump model, the question may arise of what type of impeller is best for the application. Many manufacturers offer a variety…

The AVANT™ MQ Series Brochure

The AVANT™ MQ Series is a new line of submersible pumps developed by Tsurumi Pump, an industry leader in submersible pumps for over 95 years.…

Blackmer® MAGNES Series Sliding Vane Pumps Solve Legacy Pain Points

Introduction There are some things you just can’t avoid: death, taxes, and a pump’s common operational pain points- leaks, dry run, solids handling, cavitation-causing NPSH…

Buffer & Barrier Fluids

Author: Mark Savage, FSA Member As operators of pumping equipment become more focused on the safety, reliability and environmental impact resulting from shaft seal leakage,…

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Sign up for our Newsletter


By submitting this form, you are consenting to receive marketing emails from: Empowering Pumps & Equipment, 2205-C 7th Street, Tuscaloosa, AL, 35401, http://www.empoweringpumps.com. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact