Abstract
Aiming at the high-temperature strain gauge on the turbine blade of aero-engine, which needs to bear the high-temperature effect and reliably carry out the strain test, the turbine blades and adhesive strength of rubber layer of adhesive strain gauge were studied by the theoretical analysis, software simulation and experimental verification method. Three-dimensional model of turbine blade was built firstly. And then, the CFD of the blade fluid domain was analyzed. The bonding position of the strain gauge was determined under the actual working condition by the coupling analysis of hydrodynamics, centrifugal force, thermal stress and aerodynamic force. The reliability of strain position simulation of turbine blade was verified by dynamic strain contact measurement experiment. The effect of high temperature and CFD analysis of turbine blades with rubber layer was carried out. The effects of different rotational speeds on the adhesive strength of the adhesive were studied. It was shown that the strain and stress distribution of the blade’s pressure surface was more uniform than the suction surface.
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