Abstract
Injection process into a confined cross flow is quite important for many applications including chemical engineering and water desalination technology. The aim of this study is to investigate the performance of the injection process into a confined cross-flow of a round pipe using a single piston injection pump. A computational fluid dynamics (CFD) analysis has been carried out to investigate the effect of the locations of the maximum velocity and minimum pressure on the confined cross-flow process. The jet trajectory is analyzed and related to the injection pump shaft angle of rotation during the injection duty cycle by focusing on the maximum instant injection flow of the piston action. Results indicate a low effect of the jet trajectory within the range related to the injection pump operational conditions. Constant cross-flow was used and injection flow is altered to vary the jet to line flow ratio (QR). The maximum jet trajectory exhibits low penetration inside the cross-flow. The results showed three regions of the flow ratio effect zones with different behaviors. Results also showed that getting closer to the injection port causes a significant decrease on the locations of the maximum velocity and minimum pressure.
Highlights
Cross-flow Injection is an important process for many applications
In order to better understand the behavior of the JICCF, a 3D-computational fluid dynamics (CFD) study is performed for the maximum jet action case (QR=8.25%) occurring at shaft angle α =113o to evaluate how the velocity and static pressure behave along the axial flow at 3-different radial distances
CFD analysis of the jet action into a confined cross-flow has been performed and related to instantaneous flow rates indicated by shaft angle variation of a single piston injection pump
Summary
Cross-flow Injection is an important process for many applications. The most widely used type worldwide is the diaphragms pump type because of its simple and compact design with relatively low cost compared to other types. The disadvantage of this type is mainly due to its diaphragm material which subjected to intensive cyclic fatigue at certain points. Results provided optimum operating conditions of the Tjunction in a real field of Phoenix reactor showing the importance of a 90° bend component which enhances the mixing process mechanism. The cross-flow angle with injection direction significantly affected the velocity ratio and it is important for improving the design of piping systems [12]. The results show that the geometry of the mixing region strongly affects the www.etasr.com
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