Cavitation occurring in inducer-equipped turbopumps causes unstable phenomena such as rotating cavitation and cavitation surge, leading to problems of vibration and noise. In this study, we focused on the camber line, which affects the suction performance and cavitation characteristics. Numerical analyses were conducted on two-dimensional cascades, assuming inducer blade tips with several types of camber lines that differed in the ratio between a straight section with a constant blade mounting angle and a curved section with camber. By investigating the dynamic characteristics of cavitation volume, we analyzed the conditions under which cavitation instability phenomena occur. As a result, we confirmed that there are differences in the phase lag of dynamic characteristics at the onset of cavitation surge.
Mori et al. (Wed,) studied this question.