Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Do Dyson's bladeless fans produce enough air pressure to cool say an air conditioning unit and do they produce a vortex pressure like a bladed fan?

share|cite|improve this question

closed as off-topic by jinawee, Brandon Enright, John Rennie, WetSavannaAnimal aka Rod Vance, Jim Apr 1 '14 at 20:00

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question appears to be about engineering, which is the application of scientific knowledge to construct a solution to solve a specific problem. As such, it is off topic for this site, which deals with the science, whether theoretical or experimental, of how the natural world works. For more information, see this meta post." – jinawee, Brandon Enright, John Rennie, WetSavannaAnimal aka Rod Vance, Jim
If this question can be reworded to fit the rules in the help center, please edit the question.

More on Dyson fan: – Qmechanic Mar 31 '14 at 22:07
up vote 3 down vote accepted

Don't get too confused by the "bladeless fan" marketing babble. Something, probably a traditional blower, is pushing air around inside the device. This is ducted so that the flow blows in one direction from little nozzles on the inside of a ring. That causes a lot more air to be moved by Bernoulli's principle. Basically, the ring and nozzles converts high pressure low flow air into low pressure high flow air.

Overall, this system is likely to be (I don't have any numbers, just a guess on my part) less efficient than a traditional fan. The claimed advantage is that you don't feel pulses as individual fan blades spin around. I find that argument rather hard to swallow since I never noticed pulses from a traditional fan. After a relatively short distance the flow will break up and become turbulent anyway, even if it started out perfectly smooth, so this whole issue smells strongly of marketing BS to me.

share|cite|improve this answer
If you have ever seen a Dyson on display, working, you will find that the fan does produce significantly less turbulent air flow. Wither that is worth the $200 price tag is up to you. But yes, it IS a highly inefficient fan. – Aron Nov 26 '14 at 5:42