Hi pechan and welcome to the forum.
I made a couple assumptions... low carbon steel pipe... and babies and puppies playing directly below this... and sorry to say... The pipe you selected won't handle your load. I didn't go full out calculating this because I can be a little lazy sometimes. I just took a quick look at the stress and deflection with just the turbine thrust load you gave, and your tube or pipe doesn't come close to cutting it. Add to that the tower weight and drag etc. and the numbers will only get worse.
You should contact the manufacturer of your turbine and tell them how how high you need to go and have them tell you how much tower or post you're going to need. Better check with your local building codes to be sure you're even going to be allowed to put the thing up. A lot of places frown on them?
Good Luck,
Bob