1. Parametric Study of Ejector-Cooled Turbine Engine Compartment Using CFD Mike Kazlauskas 12-3-2009

2. Overview Modeling turbine engine compartment using CFD Uses ejector arrangement for compartment cooling- High speed, primary flow entrains secondary flow Runs will be 2D, axisymmetric. Profile of compartment is created and virtually revolved around centerline Trying to determine effects of compartment cooling flow and exhaust loss on cooling inlet size, ejector gap size, and primary nozzle velocity

3. Compartment Schematic

4. Compartment Mesh and Control Volume

5. Mesh Closeup- Ejector Gap Detail

6. Compartment Geometry Turbine Exit Plane Primary Nozzle Mixing Duct Cooling Inlet

7. Geometry Sizes Mixing Duct Sizing Primary Nozzle Sizing

8. Sample Run- Contours of Velocity (ft/s)

9. Secondary Flow vs. Ejector Gap Size

10. Full Result Summary

11. Run Summary

12. Conclusions Smallest primary nozzle with large mixing duct produced highest overall secondary flow, however exhaust loss was twice as high as other configurations Constant area primary nozzle with large mixing duct produced relatively high secondary flow with significantly lower losses than small nozzle configuration Configurations with inadequate ejector gap area are limited to the maximum amount of secondary flow regardless of complartment cooling inlet area