| 摘要 |
Provided is an erosion characteristics database for the purpose of quickly predicting the amount of erosion for a wide range of construction objects such as fluid machinery, without requiring the operation of a virtual machine or an actual machine. Also provided are a method for constructing said database, and an erosion prediction method and erosion prediction system using said database. In this method for predicting erosion due to fluid machinery surface cavitation, an erosion intensity distribution is calculated for each site on a fluid machinery surface, from cavitation flow field characteristics in the flow path formed by the fluid machinery, said characteristics being obtained using a cavitation CFD method; on the basis of the erosion intensity distribution, the radius distribution and the center position distribution of a representative sphere, and the number of shape deformations by the representative sphere, are determined, for the purpose of assuming an erosion surface having a porous surface property; the fluid machinery surface for which a prediction is to be made is determined as an approximate erosion surface; and the shape of the approximate erosion surface after deformation is calculated on the basis of the radius distribution and the center position of the representative sphere and the number of shape deformations by the representative sphere. |
