7.1 Verification of the simplified dynamic clearance model

To verify the simplified dynamic clearance model (see Section 2), the following engine dynamics test case was prepared:


Total HPT disk displacements (mechanical and temperature-induced) were computed for this test case in ANSYS and by the proposed SDCM (see Section 2). As shown in Figure 10, the simulation curves practically coincide. The maximum difference observed at the mode change moment is about 0.05 mm and then it lessens. Thus, the simplified model can be considered accurate enough and can be used within ENDM of the turbofan engine under analysis.
