Table 1: Experimental results.

Width of the annular gap12 mm6 mm2.5 mm

Mass flow rate at the outlet, kg/sEntrance is opened experiment0.921.071.23
Entrance is opened calculations1.191.612.51
Entrance is closed experiment0.870.73
Entrance is closed calculations0.700.700.70
Entrance is opened swirling jet calculations1.621.522.83

Ejection coefficient Entrance is opened experiment0.350.570.81
Entrance is opened calculations0.751.372.69
Entrance is closed experiment0.280.07
Entrance is closed calculations0.000.000.00
Entrance is opened swirling jet calculations1.311.173.04