TIP LEAKAGE FLOW SIMULATION

IN AFTRF BLADE PASSAGES

Levent Kavurmacioglu, Debashis Dey & Cengiz Camci

Department of Aerospace EngineeringTurbomachinery Heat Transfer Laboratory

The Pennsylvania State UniversityUniversity Park, PA 16802

cxc11@psu.eduhttp://www.personal.psu.edu/cxc11/vki.html

Figure 1, 3D computational grid for the AFTRF turbine rotor flow simulations

Figure 2, Grid structure near the baseline tip configuration

130x65x88105x51x74

75x65x2650x51x26

GOVERNING EQUATIONS

Ui,i 0

U j

Ui

x j

p

x i

2U i

x jx j

R i j

x j

Rij uiu j 23

k ij tUi

x j

Uj

x i

2/iiuuk

t C k 2

U i

k

x i

t

U j

x i

U i

x j

U j

x i

x i

( t k)k

x i

U i

x i

C1kt

U j

x i

Ui

x j

U j

x i

C22

k

x i

(t )x i

Up C1 4 k p

1 2

w 1

Ln Ey p*

GOVERNING EQUATIONS

Figure 3 Tip leakage visualization planes(cross-stream direction & blade height)

Figure 4, Turbine rotor inlet flow conditions

•

Figure 6, Velocity vectors at various planes in the tip gap (BASELINE TIP - full cover)

Figure 7 , Leakage Flow Patterns in the tip gap space inside cross stream planes(BASELINE TIP, full cover)

Figure 7 , Leakage Flow Patterns in the tip gap space inside cross stream planes(BASELINE TIP, full cover)

Figure 8, Leakage flow patterns in planes parallel to the tip surface,(BASELINE TIP, full cover)

Figure 8, Leakage flow patterns in planes parallel to the tip surface,(BASELINE TIP, full cover)

Figure 8, Leakage flow patterns in planes parallel to the tip

surface,(BASELINE TIP,

full cover)

TIP LEAKAGE FLOW SIMULATION

IN AFTRF BLADE PASSAGES

Levent Kavurmacioglu, Debashis Dey & Cengiz Camci

Department of Aerospace EngineeringTurbomachinery Heat Transfer Laboratory

The Pennsylvania State UniversityUniversity Park, PA 16802

cxc11@psu.eduhttp://www.personal.psu.edu/cxc11/vki.html