13

pressure, which is the pressured difference between the total pressure (po) and static pressure in wind tunnel, is obtained by a Dwyer Microtector manometer with a precision of 0MmmH2O.

The density of air in the wind tunnel can be calculated from the ideal gas law:

MmrP RT

in which the P and T are the static pressure and temperature of the incoming flow in the wind tunnel.

The incoming main flow velocity and Reynolds number at the cascade exit based on chord and exit velocity can then be obtained from:

AR is the area ratio of inlet to exit of the blade passage (=2.72).

The static pressures measured on the pressure blade is read from a manometer system with a precision of 1.3mm water height.

0 0

Post a comment