Implementing a Rotating Surface to a 3D CFD Model of an Adaptive Seal

  • chair:Jet engines / Gas turbines / Numerical Simulation / CFD
  • type:numerical master thesis
  • tutor:

    James Lofts, M.Sc.

Task

Within modern gas turbines, contactless sealing mechanisms are necessary to seal the airflow between high-speed rotating and stationary surfaces. These seals operate with a minimum possible gap width between the rotor and the stator, so that the leakage is reduced and the maximum turbine inlet temperatures and pressure ratios can be increased. In the adaptive seals test rig at ITS, prototype adaptive seals are tested against a rotor and activated with controlled inlet and outlet pressurized air flow.

In this work, a pre-developed 3D model needs to be expanded by implementing a rotating surface, in order to simulate the influence of rotor surface speed on the performance of an adaptive seal. You will be using ANSYS CFD tools, first to understand the existing model, then to implement the required modifications. The final model should be easily adjustable, so that you can input a range of pressures, clearances and rotational speeds. Then you will investigate how the simulation results are influenced by changing rotational speed, and you will compare these findings to experimental results from the test rig.

This project offers a real-world application of CFD numerical modelling to calculate detailed flow pressure and velocity distributions based on experimental data. Prior experience with ANSYS or other CFD software is preferred.