Aero Engine Triple Spool Design minimize Engine Surges is the majar advantage of 3 Spool Concept

Major advantage of triple spool design is it’s ability to minimize engine surges thus they are the most efficient engine flying.

As mentioned by JETPILOT, namely that the more spools you have, the better because then they will be allowed to spin at their own speed given their spool mass.

Let’s say you’re at takeoff power with for example a double spool engine. The heavy N1 spool is turning at it’s own RPM and so is the lighter N2. Now you chop off the power. The lighter N2 will drop in RPM much quicker then the heavy N1 with it’s huge fan. So what happens is that the N1 compressors are feeding way too much air to the second (HP) compressor.

Where is all that excess air gonna go ?
Well in extreme cases you can have a very damaging engine surge in which air will flow in the wrong way through the engine. Most of todays engines have very sophisticated computer controlled “bypass doors” that let the air escape from the compressor casing.
But the chance of engine surges always remains. If you have three spools, the weight difference is spread over 3 spools thus drastically reducing the chance of engine surges


7 comments on “Aero Engine Triple Spool Design minimize Engine Surges is the majar advantage of 3 Spool Concept

  1. Hmm it looks like your blog ate my first comment (it was extremely long) so
    I guess I’ll just sum it up what I submitted and say, I’m thoroughly enjoying your blog.
    I as well am an aspiring blog blogger but I’m still new to everything. Do you have any recommendations for novice blog writers? I’d definitely appreciate it.
    Much appreciated!

  2. Hi, I think that I visited this blog before thus I am back to enjoy
    the good reading. I am attempting to find good information to improve my site!
    I suppose its ok to use a few of your great ideas!
    You really have a talent for writing. Many thanks, to you!

  3. It sounds like you are creating problems yourself by attempting to solve
    this issue rather than looking at why their is a problem in the first place.

    Very much appreciated!

  4. Hey! Do you know if they make any plugins to help with Search Engine Optimization?
    I’m trying to get my blog to rank for some targeted keywords but I’m not seeing very
    good gains. If you know of any please share. Many thanks, to you!

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s