The Open Mechanical Engineering Journal

2015, 9 : 77-79
Published online 2015 February 20. DOI: 10.2174/1874155X01509010077
Publisher ID: TOMEJ-9-77

Research on the Flow Characteristics of Sudden-Reduction Oil Tube

Zhibin Zhang , Chunxi Lin , Weiqiang Ye , An Wei , Leming Xiao and Wanzheng Ai
Guangzhou Maritime Institute, Hongshan San Road, Huangpu, Guangzhoux, Postcard: 510725, China.

ABSTRACT

The backflow region length in sudden-reduction oil tube is not only closely associated with its energy loss, but is also closely related to the partition between orifice plate and plug. In this paper, the characteristics of backflow region length in sudden-reduction oil tube are researched. The results illustrated that backflow region length decreases with the increase in the contraction ratio. Moreover, when Reynolds number is more than 105, Reynolds number has little impact on backflow region length. Empirical expression about backflow region length in sudden-reduction oil tube is also discussed in this paper.

Keywords:

Backflow region, Contraction ratio, Reynolds number, Simulations, Sudden-reduction..