a veriable density wind tunnel is pressurized to 20 atmosphe

a veriable density wind tunnel is pressurized to 20 atmospheres and used to test an airfoil. the tunnel air temperature is standard at sea level and the test section velocity is 50 m/s. find the reynolds number of a model airfoil having 0.3 m chord.

Solution

Reynolds no= VD/v

Given V= 50 m/sec D=0.3m

v value at 2o atm = 1.5111E-5 m2/sec

Re = 50*0.3/(1.5111E-5)

RE = 992720