Study on oil film characteristics of disc surface in a disc skimmer

Abstract

The spinning disc is a key component of the disc skimmer, and its oil carrying characteristics directly affect the performance of the oil skimmer. For a long time, the design of disc skimmer mainly relies on experiences and experiments, which limits the upgrading and optimization of disc skimmer. In this paper numerical simulation research on oil film characteristics of disc surface in skimmers was made by the VOF model, and the influence of disc radius, rotational speed, immersion depth, and oil viscosity and density on the surface oil film characteristics of the spinning disc was analyzed. The results show that the oil film thickness increases and then decreases as the radius of the turntable increases. And the deeper the immersion, the higher the oil film coverage on the disc surface. And the larger the rotational speed, the thicker the oil film on the disc surface within a certain range. As the viscosity of the oil increases, the oil film thickness on the disc surface also increases. When the viscosity is less than 30mPa·s, it is difficult to form an oil film on the surface of the spinning disc. The influence of oil density on the thickness of the oil film is relatively small. The research results of this paper have certain guiding significance for the optimization design of disc oil skimmer.