Investigation of the Effect of Pipeline Size on the Cross Flow Injection Process

  • M. Elashmawy Department of Mechanical Engineering, University of Hail, Saudi Arabia | Department of Engineering Science, Suez University, Egypt
  • A. Alghamdi College of Engineering, University of Hail, Hail, Saudi Arabia
  • I. Badawi Mechanical Engineering Department, Engineering College, University of Hail, Saudi Arabia
Volume: 6 | Issue: 3 | Pages: 1023-1028 | June 2016 |


Injection pumps constitute an essential component for many industrial applications. The main focus of this study is to predict the effect of the size of the pipeline on the cross flow injection process. A test-rig was designed, built and equipped with three different pipelines, 1½", ¾" and ½" diameters. Comparison was made under constant line pressure of 40-bar and line flow rate of 5 liter/min, with a fixed injection pump rotational speed of 100 rpm. The main parameter tested was the injection dose capacity at different pump displacements. Cross flow mixing process is also theoretically studied using 3D-CFD analysis to show the injection cross flow behavior for the same geometry and parameters used for experimental test. Results show that increasing the size of the pipeline increases injection pump doses ability. This effect is insignificant at lower injection pump displacements, while the effect of the size of the pipeline becomes dominant when increasing the displacement. By changing the size of the pipeline from ½" to 1½" diameter injection pump dose capacity increases by 3.24% at 100% pump displacement. Selecting larger pipe sizes for injection ports is recommended whenever possible.

Keywords: injection, mixing, cross-flow, CFD, receprocating


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R. Lachenmann, J. Dirscherl, “Advanced performance of small diaphragm vacuum pumps through the use of mechatronics”, Applied Physics A-Material Science & Processing, Vol. 78, pp. 671-673, 2004 DOI:

X. Hai-bo, F. Xin, Y. Hua-yong, “Effects of structural parameters and rigidity of driving diaphragm on flow characteristics of micro valveless pump”, Journal of Zhejiang University SCIENCE, Vol. 4 No. 1, pp. 53-57, 2003 DOI:

A. Kurteev, “Diaphragms for pneumatic pumps, Chemical and Petroleum Engineering”, Vol. 47, No. 7-8, pp. 550-556, 2011 DOI:

A. Ratka, H. Berndt, “A novel analytical low-cost flow system based on a 0.6 MPa (84 psi) diaphragm pump applied to on-line trace pre-concentration in flame AAS and ICP-OES”, Anal Bioanal Chem, Vol. 375, No. 2, pp. 275-280, 2002 DOI:

H. Murrenhoff, Grundlagen der fluidtechnik teil 1: Hyraulik. Umdruck zur Vorlesung, Shaker Verlag GmbH, Germany, 2005

S. M. Hosseini, K. Yuki, H. Hashizume, “Classification of Turbulent Jets in a T-Junction Area With a 90-deg Bend Upstream”, Int. J. Heat Mass Transfer, Vol. 51, No. 9-10, pp. 2444–2454, 2008 DOI:

S. M. Hosseini, K. Yuki, H. Hashizume, “Experimental Investigation of Flow Field Structure in Mixing Tee”, ASME J. Fluids Eng., Vol. 131, No. 5, p. 051103, 2009 DOI:

S. Qian, J. Frith, N. Kasahara, “Classification of Flow Patterns in Angled T-Junctions for the Evaluation of High Cycle Thermal Fatigue”, ASME J. Pressure Vessel Technol., Vol. 137, No. 2, p. 021301, 2014 DOI:

Bosch, CHP 12V 42W DC motor, Data sheet, 2016, URL:


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