If the air is traveling into the chimney at such high speed, would not it produce hurricane winds right next to the chimney?
There is a problem of high winds of air coming inside the chimney. There are two solutions to this: either to make the chimney shorter and less powerful, or make a wider lower end rim. For example, if the chimney is 1 km in diameter, we can make a lower base/ rim 3 km in diameter, which will reduce the speed of the wind on the entrance 10 times.