Material Properties  - What Really Matters?

by Kevin Fairman on Nov 9, 2018 10:36:00 AM

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 and deflection of the parts we have so carefully designed. But sometimes, we lose track of what matters. We know that material strength, weight, stiffness, toughness, thermal conductivity and thermal growth all matter. They are in a material database, so they must.

Gas Turbine Automobiles - Yesterday, Today and Tomorrow

by Francis A. Di Bella, P.E. on Nov 2, 2018 9:58:38 AM

Credit for the first gas turbine engine used in flight is given to Dr. Frank Whittle.  Dr. Whittle maintained a steadfast commitment to developing gas turbine-powered aircraft in the midst of World War II when England was being attacked by Germany’s conventional aircraft bombers. While the gas turbine aircraft wasn’t developed early enough to impact WW ll, the interest in increasing the speed of aircraft continued to spur development for use in commercial as well as military planes. The advancements in gas turbines, combined with rapid advances in several technologies, including rocketry, computers and material sciences, contributed to the dawn of the Space Age.

There is No Such Thing as a Design Point

by Dr. Peter Weitzman on Oct 26, 2018 10:00:00 AM

Most turbomachines need to operate across a range of fluid flow rates and speeds. This is obvious in transportation applications where gas turbine engines and turbochargers need to operate at all of the speeds, altitudes and temperatures that the vehicles they power will encounter. In industrial and refrigeration applications, turbomachines need to have a wide operating range to make them appealing to end users who want efficiency under many operating conditions.

Splitter Design for Radial Compressors  - Video Blog

by Mark R. Anderson on Oct 19, 2018 9:34:49 AM

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 video.

Why are Turbine Blades Twisted?

by Dan Hinch on Oct 12, 2018 10:09:00 AM

It’s a straightforward question, but many turbomachinery engineers can’t easily explain the physics behind blade twist. Some shorter high-pressure turbine (HPT) blades appear nearly 2D in shape (little or no twist). Blade twist is more commonly seen in taller turbine blades, which should give an immediate clue as to origin of blade twist.

Top Five Coolest Turbomachinery Applications

by Barbara Shea on Oct 4, 2018 4:21:33 PM

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. 

Extending the Operating Range of Centrifugal Compressors

by Adam Weaver on Sep 28, 2018 10:36:51 AM

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 practice many pieces of technology, including full span inlet guide vanes (IGV’s), complex multistage systems with interstage bleed, passive casing treatment, and many others.

Designing Turbomachinery is like Solving a Rubik's Cube

by Barbara Shea on Sep 21, 2018 10:01:00 AM

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 shape, it changes the aerodynamics, and could impact manufacturability. Everything you change has a cascading effect across many different areas, because all of the areas are linked; just like a Rubik's® cube! Only, in turbomachinery design, you are not always trying to get all of the sides to be one color. Heck, even a 3-year old can do that

Investing in Designing Gas Turbines for Power Generation

by David Teal on Sep 14, 2018 11:46:08 AM

Gas turbines (or GTs) are important in the power generation sector due to their high efficiency, cleaner emissions and faster startup than old coal-powered plants. These power generators can range from small, local power supplies to huge units, large enough to power a city.  Even with the surge in renewable energy sources, there will always be a need for power when the sun goes down, on a windless day or when power peaks are expected. GTs fill this power gap. GTs are very power dense, meaning they can produce a lot of power in a relatively small footprint. This is very useful in a city, offshore, or where vast landmasses are unavailable. 

Trends in Composite Materials for Turbomachinery Applications

by Arsalan Adil on Sep 7, 2018 8:54:51 AM

The advancement of composite material technologies over the past few decades has contributed to their widespread use in a vast array of aerospace applications. Most applications target weight reduction without compromising the strength and endurance capabilities of the metallic structures being replaced. The high-strength composite materials used in advanced applications involving elevated temperature conditions are, typically, continuous fibrous material embedded in a matrix material that acts to hold the fibers together. The fibers in the matrix material can be oriented in various directions to achieve the desired mechanical properties in any specific direction. Weight reduction is achieved by eliminating redundant fiber material for the directions in which material strength and stiffness are not required by the design.

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