Petroleum Science >2011,??Issue 1:??108-113 DOI: https://doi.org/10.1007/s12182-011-0122-4
A criterion for flow mechanisms through vertical sharp-edged orifice and model for the orifice discharge coefficient Open?Access
文章信息
作者：Cao Rui,Liu Yansheng and Yan Chaoyu
作者单位：
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
投稿时间：2010-01-05
引用方式：Cao, R., Liu, Y. & Yan, C. Pet. Sci. (2011) 8: 108. https://doi.org/10.1007/s12182-011-0122-4
文章摘要
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.
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.
关键词
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Orifice discharge coefficient, theoretical criterion, model, ratio of orifice diameter to plate thickness, Reynolds number, liquid head