Computational Fluid Dynamic Analysis of a Vibrating Turbine Blade
Table 1
Boundary conditions for the FSI model as shown in Figure 2.
Boundary
Description
Inlet
Inlet velocity = [44.38i − 61.08j + 0k] m/s, in which i, j, and k are the unit vectors for , and coordinates as shown in Figure 3.
Outlet
Average relative static pressure = 0.
Casing surface
Nonslip wall
Hub
Nonslip wall
Stator blade
Nonslip wall
Rotor blade
Nonslip wall with forced vibration added to represent the response to forces from the periodic traversing of high and low pressure regions from the preceding stator blade row. The displacement of the rotor blade is presented as a sinusoidal displacement as a function of time and position in the z-direction as follows: , in which there are 40 stator blades, = 1.2868 s is a phase offset calculated from the applied pressure, and = 0.1 m is the radius of the hub
