高比速度遠心ポンプに生じる激しい壊食性キャビテーションの高速写真観察

概要

論文の詳細を見る
In order to clarify severe pump erosion practically, cavitation aspects are precisely measured at a specific speed N_s=300 (m, m^3/min, rpm) under various test conditions, especially at low flow rates, through a clear-lucite front shroud of the test impeller and the lucite casing, by means of instantaneous photography and a high-speed video camera, the maximum framing rate of which is 40500 frames per second. Erosion tests are also carried out using three-dimensional impellers made of aluminum alloy. Severe erosion takes place on several parts of the test impeller, i.e., on the main shroud and on the suction side. At a low flow rate, severe erosion occurs on the pressure side near the leading edge. This results from a vortex cavitation arising in the reverse flow region near the pump inlet.
一般社団法人日本機械学会の論文
1995-11-25