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Propeller pumps design issue

Propeller pumps design issue

(OP)
Recently , I'm trying to design a propeller pump, and I have refer to some product manuals from some pump manufacturer. Now I have a question: why some pump have a stator/ guide vanes behind propeller but some not? In terms of cost, if such a big pump running at 4500m3/h x 4m don't need a stator, it goanna be very cheaper. But what the disadvantage it will have if no stator mounted?

Any comments will be very appreciated! Thanks a lot.

RE: Propeller pumps design issue

Why bother, many already available to order.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

RE: Propeller pumps design issue

It could be a manufacturer proprietary design. And, it's the customer's choice to use either one.

RE: Propeller pumps design issue

It is a tradeoff between making some components stronger or weaker versus the selling cost. Agree with Artisi.

RE: Propeller pumps design issue

A propeller introduces rotation into the flow, which causes energy losses and other potential problems downstream. Vanes convert the rotation into more axial flow and improve energy efficiency.

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