Draft Tube Surges. A Review of Present Knowledge and an Annotated Bibliography.

摘要

A literature survey and a review of material related to draft tube surges is presented. The literature survey consists of an annotated bibliography of 68 articles published between 1910 and 1970. The review is restricted to three major areas: experiments with elementary models, experiments with model and prototype turbines, and field expedients to reduce surging. Velocity distributions and surge frequencies are given special attention in the first two areas. Present knowledge is sufficient for predicting the order of magnitude of draft tube surge frequencies and relative surge amplitudes. (Author)