A low-pressure turbine within a turbofan jet engine consists of five repeating stages. It operates with a mass flow of
15k(g)/(s)and generates 6.64 MW of mechanical power. The stator in each turbine stage turns the flow from
15\deg at stator inlet to
70\deg at stator outlet. The turbine mean radius is 0.46 m and the rotational shaft speed is 5600 rpm . Calculate the turbine stage loading coefficient and flow coefficient. Hence, show that the reaction is 0.5 .
\alpha _(1)=15\deg ,\alpha _(2)=70\deg ,n_(stage )= five stages
P=6.64MW Stage loading \psi =
\Omega =5600rpm Flow coefficient \phi =
r_(m)=0.46m,
m=15k(g)/(s)