Dynamic solutions for a fluid world™

AFT President & Founder | ASME Fellow - Trey founded AFT in 1993. He was the original developer of AFT Fathom (including the GSC and XTS modules), AFT Arrow and AFT Impulse. He was active in software development until 2011 and still works with the development team in addition to managing AFT. He has taught hundreds of training classes on AFT’s ...software products in twelve countries across every populated continent. He worked previously for General Dynamics in cryogenic rocket design and Babcock & Wilcox in steam/water equipment design. He holds a BSME (1985) and MSME (1986), both from the University of California, Santa Barbara. He is a registered Professional Engineer.   More
Trey Walters

Did you know that New Jersey is a barrier in Spain?

It is true. New Jersey is a barrier in Spain. I saw it with my own eyes. Bear with me and I will explain.

When I travel internationally I find the people, cultural and language differences fascinating. Last month I was fascinated once again. My blog last month was written while on an airplane as I travelled to Europe (see my July blog When Pipe Stress Analysis Meets Waterhammer Hydraulics: New Waterhammer Guidelines for Engineers). Before going to the ASME PVP conference in Prague (check out this video one of our staff made) I stopped in Spain for 4 days. While there I was fortunate to visit the location of an AFT Impulse project by one of our customers that was a Platinum Pipe Award Winner this year. This case study was published in April. See AFT Impulse™ Matches Data For Pumping Station Check Valve Closure. That pump station photo in the case study is where I visited. Below is a photo of me and the PPA winner David Lozano Solé of AQUATEC – SUEZ Group. For those interested, this project is being presented as a technical paper by David at the 2018 Pressure Surges Conference in Bordeax, France in November. I will be there to help and also present two other papers of my own. So where does New Jersey come into this?

Continue reading
Recent Comments
Nicholas Matthews
I grew up in Nebraska, far from the influences of Spain and from as far back as I can remember, we called those blocks "Jersey Bar... Read More
Thursday, 23 August 2018 17:17
Trey Walters
Wow, I have lived in California, Ohio and now Colorado and this is news to me! I am sure Pedro will be happy to here this!
Thursday, 23 August 2018 17:36
Trey Walters
Thank you Javier! That is very interesting. To other blog readers, Javier works with David Lozano at AQUATEC - SUEZ Group and I me... Read More
Thursday, 23 August 2018 20:50
  993 Hits
  4 Comments
Trey Walters

When Pipe Stress Analysis Meets Waterhammer Hydraulics: New Waterhammer Guidelines for Engineers

I am sitting on an airplane at this moment somewhere over the Atlantic Ocean and I am excited. Something that has been in the works for 22 years will happen next Monday, July 16 in Prague, Czech Republic. That is where the ASME PVP 2018 Conference will happen and I get to make a presentation.

Last year I helped AECOM, an AFT customer and AFT Impulse user, develop a set of pragmatic internal design documents for their project on handling radioactive fluid transport. Two of these documents provided their engineers guidance on interpreting and applying transient cavitation predictions. 

We proposed these two documents to the ASME PVP Division and they liked them enough to allow us to publish two new papers at their conference. I will be presenting these papers on behalf of AECOM and AFT.

But why I am so excited about this?
Continue reading
Recent Comments
Trey Walters
Yes, the link in the blog now points to the full papers here: http://www.aft.com/learning-center/technical-papers... Read More
Tuesday, 24 July 2018 14:47
  965 Hits
  2 Comments
Trey Walters

Where the Jobs Are(n’t)

It's time again for that discussion. Which discussion, you ask? I am talking about the discussion regarding the onward march of technology, automation and job creation and destruction. If international observers are mystified by President Trump, know you are in good company because he also mystifies many Americans. But he represents a trend that is not just American as seen by the Brexit vote and similar "national interest first" thinking in other parts of Europe and the world. 

A large concern in America is the perceived decline of manufacturing in the USA. An article last month in Mechanical Engineering magazine "The State of American Manufacturing 2018" brings up some complicated issues that got me thinking.

So, let's start at the beginning.  

Continue reading
  712 Hits
  0 Comments
Trey Walters

Reaching to the Sky in Dubai

Until a week ago, when I thought of Khalifa Tower, I thought of the Mission Impossible (Ghost Protocol) movie with Tom Cruise' death-defying action scenes hanging off the outside of the building. Now, I think of my visit there a week ago. 

At 828 meters (2,717 ft) tall, Burj Khalifa (also known as Khalifa Tower) in Dubai, UAE, is the tallest building in the world – at the moment (more on that later).

As Khalifa Tower reaches to the sky physically, Dubai reaches to the sky metaphorically. I have visited about 30 countries and have never seen anything like it. Twenty years ago, there was mostly sand. And now?

Continue reading
  784 Hits
  0 Comments
Trey Walters

We Have Some Really Kewl New Stuff For You in AFT Fathom 10!

We at AFT work hard. Why?

We put a lot of thought into our software features. Why?

We try hard to listen to what you, our customers, tell us you want. Why?

The answer to all three questions is the same... 

Continue reading
  1410 Hits
  0 Comments
Trey Walters

How a Russian Hydraulics Handbook Gained the Respect of the American Nuclear Industry

We are all shaped by our experiences as engineers. Our early experiences as young engineers are especially influential. 

I first worked in the aerospace industry for five years and then the nuclear industry for two years. At each of these companies we relied heavily on a handbook written originally in Russian by a Russian engineer. I am talking about the Handbook of Hydraulic Resistance by I.E. Idelchik. This book is my "go to" book on any unusual pipe system configuration hydraulic calculations and, especially, with calculations at tees and wyes.

Continue reading
  1956 Hits
  1 Comment
Trey Walters

What is Pogo and Why On Earth Would Anyone Want To Suppress It?

The time was almost 30 years ago and it is fair to say I was not quite out of the "still wet behind the ears" stage for an engineer. I had been working in industry for about three years and I was just given a project that would change my career direction and, in fact, my life. The project? I was assigned to evaluate a new concept Pogo suppressor on a cryogenic rocket engine liquid oxygen (LOX) feedline. 

How did I end up getting assigned this project? Well, I had a few things going for me at that stage of my career. Firstly was that my company division was on a massive hiring spree. Since I had been hired three years earlier my division had doubled in size. Fortuitously for me, that meant I was now in the upper 50% of seniority. Secondly, I had just had a performance review and I had casually told my immediate supervisor during the review that I would be interested in learning about waterhammer should the opportunity arise. Thirdly and finally, I had demonstrated a knack for solving tough analytical problems. What that meant is that I was in the enviable position of having my supervisors assign me to any problem that was out-of-the-ordinary and otherwise unusually difficult. The new Pogo suppressor was such a problem.

Continue reading
  1404 Hits
  0 Comments