More than paper performance

Using any design method for complicated problems such as fan design, it is possible to come up with a number of solutions that appear to give good results. The problem is that a lot of these are just ‘paper performance’ and dont necessarily work in real life.

These arise because all design methods have to use simplifying assumptions to make them manageable. Even using the latest technology, Rolls-Royce does not create a model to work out the airflow around an entire jet engine taking everything into account. Instead the problem must be broken down into lots of bitesize pieces and analysed one at a time. Typically you have one model dealing with the aerodynamic side, and another with the structure which you need to go back and forth until you find what you need.

Posted in: Fan design on July 25th by admin

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  • Pingback by The new fan design (aero) - Hovercraft Racing — July 28, 2013 @ 4:19 pm

    […] just work on paper! For a few of the captivating nuances of the various approaches i have tried see this page. For a shed builder it may be necessary to sacrifice a bit of performance to get to a blade without […]

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