SpinOffs

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

Posts about Compressors

Which Type of Turbomachinery is Aerodynamically Easier to Design, a Compressor or Turbine?

Which Type of Turbomachinery is Aerodynamically Easier to Design, a Compressor or Turbine?

By Daniel V. Hinch, Corporate VP Sales and Marketing, Concepts NREC
Oct 29, 2021

In the world of aerodynamics, there are several branches and sub-branches of different types of aerodynamics. In the big picture the field of aerodynamics can be broken down into external and...

Continue
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...

Continue
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...

Continue
Performance Corrections for Compressor Maps

Performance Corrections for Compressor Maps

By Mark R. Anderson
Mar 29, 2019

Turbomachinery performance is almost always analyzed and tested with a fixed inflow condition. In other words, the assumption is that the inflow fluid temperature and pressure is defined and...

Continue
Radial Compressor Geometry Primer - Video Blog

Radial Compressor Geometry Primer - Video Blog

By Mark R. Anderson
Nov 30, 2018

Below is a 4 minute video blog from Mark Anderson, Concepts NREC's Chief Technology Officer, on the geometry of radial compressors. In it, he details the various parts of the compressor wheel,...

Continue
Splitter Design for Radial Compressors  - Video Blog

Splitter Design for Radial Compressors  - Video Blog

By Mark R. Anderson
Oct 19, 2018

Below is 3 minute video blog from Mark Anderson, Concepts NREC's Chief Technology Officer, on splitter design for radial compressors. Click on the small thumbnail image below to launch the full-size...

Continue
Extending the Operating Range of Centrifugal Compressors

Extending the Operating Range of Centrifugal Compressors

By Adam Weaver
Sep 28, 2018

Extending the operating range of centrifugal compressors has been a highly sought-after goal for several decades. In fact, the potential benefits have motivated researchers to develop and put into...

Continue
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...

Continue
Engine-Driven Compressor for Maintaining Aircraft Cabin Pressure

Engine-Driven Compressor for Maintaining Aircraft Cabin Pressure

By Dan Hinch
Jul 11, 2018

Commercial and military aircraft require that preset levels be maintained for aircraft cabin pressure, airflow, temperature, and humidity — regardless of flight altitude and aircraft speed. To...

Continue
A Small Taste of Two Papers from Turbo Expo 2018 in Norway

A Small Taste of Two Papers from Turbo Expo 2018 in Norway

By Barbara Shea
Jun 14, 2018

The 2018 ASME Turbo Expo in Lillestrøm, Norway was, as always, a smorgasbord of papers and presentations on the latest and greatest ideas in turbomachinery and gas turbines. Two of our favorites were...

Continue
Optimizing the Radial-to-Axial Duct Geometry for a Gas Turbine Radial Compressor Impeller

Optimizing the Radial-to-Axial Duct Geometry for a Gas Turbine Radial Compressor Impeller

By Oleg Dubitsky
Apr 13, 2018

Many gas turbines with radial compressors utilize a radial-to-axial inlet duct upstream of the first compressor stage. Aside from the fact that flow in the duct generates aerodynamic losses, the flow...

Continue
Flow Coefficient and Work Coefficient Applications

Flow Coefficient and Work Coefficient Applications

By Mark R. Anderson
Mar 29, 2018

In my last blog, I explored the concept of the flow and work coefficient. In this blog, I will explore the practical application of the two parameters in machine selection and optimization.

Continue
Flow Coefficient and Work Coefficient

Flow Coefficient and Work Coefficient

By Mark R. Anderson
Mar 22, 2018

Two often used quantities to characterize turbomachinery are flow coefficient and work coefficient. The two are generally represented as Φ for flow coefficient and φ for work coefficient. The...

Continue
Compressor Design: Influence of the Impeller Exit Blade Angle

Compressor Design: Influence of the Impeller Exit Blade Angle

By Dimitri Deserranno
Jan 19, 2018

During the compressor design process, one of the key optimization steps is to adjust the impeller exit blade angle with the goal of achieving the desired pressure ratio, efficiency and range. When we...

Continue
Getting Something for Nothing – Extending Compressor Operating Range Without an Efficiency Penalty

Getting Something for Nothing – Extending Compressor Operating Range Without an Efficiency Penalty

By George C. Zitka, P.E.
Dec 8, 2017

Can you really get something for nearly nothing? In many cases, a properly-designed compressor casing treatment can extend compressor operating range without having to pay an appreciable efficiency...

Continue
What Next for Wider Flow Range Centrifugal Compressors?

What Next for Wider Flow Range Centrifugal Compressors?

By Dr. Colin Osborne
Sep 21, 2017

Flow range is an essential consideration in the design of any centrifugal compressor system, regardless of the application. Adequate flow range is necessary, not only to assure that various...

Continue
Shrouded or Open Impellers for Compressor Chillers - That is the Question

Shrouded or Open Impellers for Compressor Chillers - That is the Question

By Steve Kohr
Aug 2, 2017

One of the most important design choices facing a chiller compressor designer is whether to utilize open or shrouded impellers. The impacts of this verdict are wide ranging, which arguably makes this...

Continue
Converting Chiller Compressors to the New Generation of Low GWP Refrigerants

Converting Chiller Compressors to the New Generation of Low GWP Refrigerants

By Dan Hinch
Jun 8, 2017

The chiller industry is under tremendous pressure to convert to new, more environmentally friendly refrigerants. This change is driven by new global regulations including, the Montreal Protocol and...

Continue
The Need for Computational Tools for Predicting Compressor Performance in Supercritical CO2 Power Cycles

The Need for Computational Tools for Predicting Compressor Performance in Supercritical CO2 Power Cycles

By Mark R. Anderson
Feb 7, 2017

Supercritical CO2 cycles have the potential to significantly improve efficiency and reduce emissions in power generation. However, the unique fluid dynamic properties of supercritical CO2 that enable...

Continue

Subscribe to SpinOffs