SpinOffs

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

Posts about Radial Turbines

7 Turbomachinery Themed Valentine’s Day Cards – Which is Your Favorite?

7 Turbomachinery Themed Valentine’s Day Cards – Which is Your Favorite?

By Barbara Shea
Feb 8, 2019

Valentine’s Day is February 14, and while some cynics refer to it as a “Hallmark holiday”, most people commemorate the day in some way. One of the biggest challenges is finding a card that perfectly...

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Increases in Temperature Envelopes and Its Implications on Material Selection

Increases in Temperature Envelopes and Its Implications on Material Selection

By Arsalan Adil
Feb 1, 2019

Temperature envelopes in the turbomachinery industry are constantly increasing as the state of the art evolves in pursuit of better performance. This means engineers need to design compressors with...

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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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Material Properties  - What Really Matters?

Material Properties  - What Really Matters?

By Kevin Fairman
Nov 9, 2018

As an engineer in the rotating machinery world, it is my job to design things that work for a very long time. To help ensure this, we have evolved the best analytical tools to calculate the stresses...

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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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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...

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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...

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Turbomachinery Textbooks Focused on Engineering Design

Turbomachinery Textbooks Focused on Engineering Design

By Barbara Shea
Jul 14, 2017

The vast majority of turbomachinery textbooks emphasize analysis when the heart of engineering is based in design. Concepts NREC is uniquely qualified to share the nature and process of engineering...

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Multidisciplinary Optimization of Turbocharger Turbine with Non-Radial Blades for Two Operating Points

Multidisciplinary Optimization of Turbocharger Turbine with Non-Radial Blades for Two Operating Points

By Dr. Nicholas C. Baines and Oleg Dubitsky
May 25, 2017

The turbine of an automotive turbocharger is subject to a wide and demanding range of requirements and constraints. High efficiency is required to reduce the pumping work of the engine that can make...

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Manufacturing Methods Used for Turbomachinery

Manufacturing Methods Used for Turbomachinery

By Mark R. Anderson
Feb 22, 2017

There are two dominant manufacturing methods used to produce turbomachinery parts – Casting and 5-axis machining. This blog will explore some of the applications and restrictions of these two methods.

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