Experimental and Numerical Investigation of Flow in ‎Hydraulic Elbows

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Selim Korkmaz Y.; Kiba A.; Suleyman Yigit K.

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Journal Paper

Paper Information

Journal: JOURNAL OF APPLIED FLUID MECHANICS (JAFM) Year:2021 | Volume:14 | Issue:4 Page(s): 1137-1146

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Title

Experimental and Numerical Investigation of Flow in ‎Hydraulic Elbows

Author(s)

Selim Korkmaz Y. | Kiba A. | Suleyman Yigit K. | Issue Writer Certificate

Keywords

HydraulicQ4

Minor lossQ4

Pressure propQ4

Banjo elbowQ4

Numerical study‎Q4

Abstract

Elbow fittings are common in Hydraulic and pipeline systems. These components cause a significant ‎pressure drop in the total pressure of a system. The Banjo elbow is advantageous in areas low to the ‎ground and where flexible connection angles are needed. However, this elbow yields a larger pressure ‎drop than a standard elbow. Additionally, the position of the internal bolt in the Banjo elbow cannot be ‎determined prior to installation, which corresponds to a wide range of possible pressure drop. In this ‎study, the pressure drop through a 3/8” Banjo elbow is investigated for different positions of the internal ‎bolt, experimentally and numerically. Experiments and simulations were carried out on Hydraulic oil with ‎four different Reynolds numbers ranging from 3111 to 6222 and at nine bolt connection angles ranging ‎from 0° to 60°. Experiments were repeated with the standard elbow of the same size to compare the ‎pressure drops to those of the Banjo elbow. Pressure was measured at both the inlets and outlets of the ‎elbows. The results suggest that the connection angle of the internal bolt is an important factor in the ‎pressure drop and minor head loss through a Banjo elbow. For Reynolds numbers of 3111 and 6222, an ‎improvement in minor head loss by 33% and 58%, respectively, was achieved by adjusting the ‎connection angle of the internal bolt in the Banjo elbows.

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