CFX Results of Alstom Blade Boundary Conditions Inlet

CFX Results of Alstom Blade Boundary Conditions: Inlet: Total pressure -- 103383. 34 Pa Total temperature -- 300 K Inflow direction -- normal to boundary condition Outlet: Static pressure Initial Conditions: The initial conditions of flow velocity, pressure, temperature, turbulence kinetic energy, turbulence eddy dissipation are all set by system. Fluid: Ideal air gas: Specific Heat Capacity – 1004. 4 J/Kg. K Euler and N-S equations are both chosen as the flow equation. Back pressure varies from 50000 Pa to 98000 Pa. Total pressure losses, entropy production and adiabatic efficiency are all shown following.

Contour Plots This report mainly shows the contour plots of three cases with different back pressure. And the back pressure is chosen as following: 55000 Pa, 75000 Pa, 98000 Pa The plots are about the distribution of Mach number on the surfaces, which are chosen from the hub to shroud and five different spans are chosen as following: 0. 1, 0. 3, 0. 5, 0. 7, 0. 9

Plots with Back pressure = 55000 Pa Span = 0. 1 Euler equation N-S equation

Span = 0. 3 Euler equation N-S equation

Span = 0. 5 Euler equation N-S equation

Span = 0. 7 Euler equation N-S equation

Span = 0. 9 Euler equation N-S equation

Plots of Back Pressure = 75000 Pa Span = 0. 1 Euler equation N-S equation

Span = 0. 3 Euler equation N-S equation

Span = 0. 5 Euler equation N-S equation

Span = 0. 7 Euler equation N-S equation

Span = 0. 9 Euler equation N-S equation

Plots of Back Pressure = 98000 Pa Span = 0. 1 Euler equation N-S equation

Span = 0. 3 Euler equation N-S equation

Span = 0. 5 Euler equation N-S equation

Span = 0. 7 Euler equation N-S equation

Span = 0. 9 Euler equation N-S equation

Results of Euler The results are all obtained as the residual decreased for about 5 orders. total pressure at outlet total pressure losses

entropy production adiabatic efficiency

Results of N-S These results are obtained as residual decreased for about 6 orders. total pressure at outlet total pressure losses

entropy production adiabatic efficiency

Comparisons of Results 1. Total pressure at outlet

2. Total pressure losses

3. entropy production

4. Adiabatic efficiency