SpinOffs

A blog on what's new, notable, and next in turbomachinery

Posts about Cavitation

Getting Real – Advanced Real Gas Models

Getting Real – Advanced Real Gas Models

By Mark R. Anderson
May 3, 2019

The Refprop program The calculations in the National Institute of Standards and Technology (NIST) Refprop program are generally considered the most accurate thermo-fluid models available.  The...

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What Is Pogo and Why Is It Bad For Rockets?

What Is Pogo and Why Is It Bad For Rockets?

By Kerry Oliphant
Jun 28, 2018

Space launch vehicles can exhibit self-excited longitudinal oscillations, also known as “Pogo” — so named because the phenomenon vibrates the rocket up and down in a manner similar to bouncing on a...

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Optimizing the Screw Inducer for a Pump

Optimizing the Screw Inducer for a Pump

By Oleg Dubitsky
Feb 16, 2018

High-efficiency, low-cavitation pumps often require a screw type inducer to treat the inflow to the main radial/mixed flow pump blades. Efficiency and head rise, split between inducer and main pump,...

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How to Design a Pump for Reduced NPSH

How to Design a Pump for Reduced NPSH

By Kerry Oliphant
Jun 20, 2017

Cavitation occurs in a pump when the bulk liquid pressure starts to approach the vapor pressure of the liquid, and cavities of vapor form as seen in Figure 1.  This figure shows the inlet of a...

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