SpinOffs

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

Posts about Pumps

How Many Pieces of Turbomachinery (Fans, Blowers, Compressors, Turbines, Pumps) Do You Have in Your House? Part 2

How Many Pieces of Turbomachinery (Fans, Blowers, Compressors, Turbines, Pumps) Do You Have in Your House? Part 2

By Daniel V. Hinch, Corporate VP Sales and Marketing, Concepts NREC
May 14, 2021

In my last blog I wrote about visiting a local middle school to give a talk on ‘What is Turbomachinery, and How Does It Work?’   The quiz at the end of the talk was for the students to list all the...

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How Many Pieces of Turbomachinery do You Have in Your House?  (and a Pop Quiz)

How Many Pieces of Turbomachinery do You Have in Your House?  (and a Pop Quiz)

By Daniel V. Hinch, Corporate VP Sales and Marketing, Concepts NREC
Apr 16, 2021

On occasion I’m invited to a local middle school to give a talk to one of the science classes about ‘What Is Turbomachinery, and How Does It Work?’.   I teach in several of the turbomachinery design...

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What’s So Hard About Designing A Pump?

What’s So Hard About Designing A Pump?

By Daniel V. Hinch, Corporate VP Sales and Marketing, Concepts NREC
Oct 6, 2020

Here at Concepts NREC, we work on a wide range of turbomachinery components designed for fluids ranging from gases to liquids, including supercritical fluids like supercritical CO2 which have...

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Entropy Happens… Deal with It!

Entropy Happens… Deal with It!

By Francis A. Di Bella, P.E.
Jul 19, 2019

If there’s one thing good about sitting in snarled traffic in Boston, it’s that you get to see some very original bumper stickers. The most recent bumper sticker I saw was probably the strangest one,...

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In Thermodynamics: “What Goes Around-Comes Around” is a Good Thing

In Thermodynamics: “What Goes Around-Comes Around” is a Good Thing

By Francis A. Di Bella, P.E.
Jun 28, 2019

When discussing the efficiency of transforming one form of energy to another, circularity is the way to go. Anyone who has spent even a little time studying engineering thermodynamics knows that the...

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The Tesla Turbine – A Solution Looking for the Right Problem

The Tesla Turbine – A Solution Looking for the Right Problem

By Barbara Shea
May 17, 2019

The great engineer, Dr. Nikola Tesla, is best known for his work with alternating current (AC) electricity, but, did you know that he patented a bladeless type of turbomachinery in 1913? Called the...

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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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Going Through a Phase – Modeling Phase Change with Cubics

Going Through a Phase – Modeling Phase Change with Cubics

By Mark R. Anderson
Apr 26, 2019

When fluids undergo a phase change (see Phase Change - Make Mine a Double), it typically has a very significant effect of the flow behavior and energy level of the system.  Some examples of this are:...

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Specific Speed Demystified

Specific Speed Demystified

By Mark R. Anderson
Jan 11, 2019

In my blog Flow Coefficient and Work Coefficient, I outlined the basic concept behind the flow and work coefficient. These nondimensional parameters are widely used to characterize axial and radial...

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Top Five Coolest Turbomachinery Applications

Top Five Coolest Turbomachinery Applications

By Barbara Shea
Oct 4, 2018

Most people have no idea what turbomachinery is, but some of the coolest things on (or off) this planet involve turbomachines.  Here are my picks for the top 5. 

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Designing Turbomachinery is like Solving a Rubik's Cube

Designing Turbomachinery is like Solving a Rubik's Cube

By Barbara Shea
Sep 21, 2018

I think we can all agree that designing turbomachinery is hard. There are just so many moving parts (pun intended) in the design process, and they are all interconnected.  When you change the blade...

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Early Water Handling

Early Water Handling

By Mark R. Anderson
Aug 24, 2018

I am fascinated by ancient cultures. After my recent visits to Roman ruins in Central Europe (see  A Turbomachinery Engineer's Summer Vacation), I began to wonder how far back mankind’s mastery of...

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The Slip Factor Model for Axial, Radial, and Mixed-Flow Impellers

The Slip Factor Model for Axial, Radial, and Mixed-Flow Impellers

By Mark Anderson and Chanaka Mallikarachchi
Jul 20, 2018

Ideally, the exit flow angle for an impeller should be the same as the exit blade metal angle. However, the exit flow angle deviates from the blade guidance at the impeller exit due to the finite...

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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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Electric Pumps for Space Propulsion

Electric Pumps for Space Propulsion

By Kerry Oliphant
Apr 5, 2018

The recent success of Rocket Lab, putting small satellites into orbit with its Electron rocket, is a significant milestone in the evolution of space flight.  The Electron rocket is powered by a set...

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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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Getting to the Root Cause of a Catastrophic Impeller Failure

Getting to the Root Cause of a Catastrophic Impeller Failure

By George C. Zitka, P.E.
Oct 27, 2017

Finding the root cause of a failure by narrowing down multiple overlaid symptoms can be a long and tedious process—and very often the true underlying problem is not what one might expect by a casual...

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Turbomachinery in Fire Fighting

Turbomachinery in Fire Fighting

By Mark R. Anderson
Oct 5, 2017

I was a firefighter (we never call ourselves firemen) for more than ten years.  While this was only a part time, volunteer gig, I was a turbomachinery developer and modeler as my full-time job. ...

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Important Considerations When Designing a Volute

Important Considerations When Designing a Volute

By Jamin Bitter
Jul 26, 2017

When designing a new compressor or pump, most of the focus is put on the impeller and diffuser because they are the elements that are responsible for the work input and its conversion from kinetic...

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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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Current Issues Facing the Global Pump Industry

Current Issues Facing the Global Pump Industry

By Robert Platt
Nov 3, 2016

The Global Pump Industry

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Extremely High Suction Performance Pump Inducers

Extremely High Suction Performance Pump Inducers

By Concepts NREC
Sep 1, 2016

The path to better operation stability and robustness High suction performance pump inducers are critical to important industrial and advanced aerospace applications where the required inlet pressure...

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