Airflow vs static pressure
Airflow vs static pressure
I'm trying to determine the classification of fans by examining measurements like CFM or mm/H20. Even though it's not the most ideal method, I want to understand what these values indicate.
I notice the fins clearly indicate the airflow characteristics. If there are many fins and the spaces between the blades are narrow or overlapping, it suggests static pressure. This design lets very little air escape backward behind the blades, increasing pressure where the air moves. Blades with higher angles move more air quickly, but they are placed farther apart, allowing air to spill backward if it encounters resistance or high pressure.