One of the important technologies to design the turbocharger is to reduce the resonance stress of the turbine blade. The resonance stress is greatly influenced by the fluctuating total pressure. In this study, we have tried to examine the relation between fluctuating total pressure and resonance stress and measured the total pressure distribution for circumference angle in a mixed-flow type turbine casing. From measurement data, we calculated the excitation force component of fluctuating total pressure by Fourier analysis. And also we carried out resonance stress measurements for the turbine blade. Through the experiments, it was found that the resonance stress was higher as the fluctuating total pressure was higher.
