Petroleum Science

, Volume 8, Issue 1, pp 108–113

A criterion for flow mechanisms through vertical sharp-edged orifice and model for the orifice discharge coefficient

Authors

  • Rui Cao
    • State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum
    • State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum
  • Chaoyu Yan
    • State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum
Article

DOI: 10.1007/s12182-011-0122-4

Cite this article as:
Cao, R., Liu, Y. & Yan, C. Pet. Sci. (2011) 8: 108. doi:10.1007/s12182-011-0122-4

Abstract

According to the experimental data of the orifice discharge coefficient for the flow through a vertical sharp-edged orifice obtained in the previous study of this work, a theoretical criterion for flow mechanisms of small orifice (viz. thick-walled orifice and nozzle) and large orifice (viz. thin-walled orifice) was proposed based on the ratio of orifice diameter to plate thickness. It can help explain the dissipation of the mechanical energy loss in the flow process for the two flow mechanisms under different operating regimes. The main parameters such as orifice diameter, plate thickness and liquid head were correlated, and a semi-empirical model for orifice coefficient and an empirical model with high precision at the stable region were developed.

Key words

Orifice discharge coefficienttheoretical criterionmodelratio of orifice diameter to plate thicknessReynolds numberliquid head

Copyright information

© China University of Petroleum (Beijing) and Springer-Verlag Berlin Heidelberg 2011