Please explain or share if you have any articles regarding the wind force affect the Fin fan coolers. We have huge number of Fin fan coolers in our LNG plant. Some of the Fans particularly making lot of troubles and We suspect the wind force is the cause for this high vibration.
The Maximum Wind velocity is 40 m/s. We have both Induced and forced draught Air coolers (Fin fans). But Forced draught fan has the history of more high vibration and broken blade history. It is onshore and wind velocity is considerable. The blade pass frequency is in uptrend, last reading was 8.5 mm/s RMS. Post inspection of broken blades, catastrophic damage, we noticed that the blade tip rubbed on the cowling. But fan did not trip, senors are good. might be vibration not transmitted to the bearing housing where permanent velometer is fixed. This blade rub on cowling is noted in the wind flow direction.
1. Could you please refer me an articles on Fin fan vibrations caused by Wind force.
2. How, the process of wind force affecting the fan vibration , technically, engineering?
3. How we can solve the issue.
4. Also other fans are noted that beat phenomenon is major issue and I have noticed that the fan been designed such that Motor speed and the fan blade pass frequency match. Can wind force stall or increase the the blade speed and 10% difference make beat?