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Explanation: The maximum air passage per second along with the peripheral speed is
calculated. On substitution the area of outlet opening is obtained
The formula to calculate the area of an outlet opening depends heavily on the shape of the outlet opening. There isn’t a singular formula that applies universally because outlets can vary in shape (circular, square, rectangular, etc.), and each shape has its own area calculation formula. I’ll provide formulas for the area of some common shapes of outlet openings:
1. Rectangular Outlet: If the outlet is rectangular, the area ((A)) is calculated as the length ((l)) times the width ((w)):
[A = l times w]
2. Circular Outlet: If the outlet is circular, the area ((A)) is calculated using the radius ((r)) of the circle with the formula:
[A = pi r^2]
where (pi) is approximately (3.14159).
3. Square Outlet: If the outlet is square, the area ((A)) is calculated as the side length ((s)) squared:
[A = s^2]
4. Elliptical Outlet: If the outlet has an elliptical shape, the area ((A)) is determined by multiplying the semi-major axis ((a)) by the semi-minor axis ((b)) and then by (pi):
[A = pi ab]
These formulas represent some of the most common outlet opening shapes. It’s important to use the formula