TY - JOUR
T1 - Experimental and numerical studies of pressure drop reduction in a 90° square elbow with the addition of circular turbulators
AU - Putra, Randi Purnama
AU - Sutardi,
AU - Widodo, Wawan Aries
N1 - Publisher Copyright:
© 2019 Praise Worthy Prize S.r.l.-All rights reserved.
PY - 2019
Y1 - 2019
N2 - – Ducting system has two major components: straight ducts and fittings (sudden enlargement, sudden contraction, elbow, etc.). Pressure drop in the ducting system is caused mostly by friction loss, separation loss, and secondary flow. The aim of this study is to propose a method for reducing the pressure drop in the ducting system by installing a circular turbulator (CT) inside the 90° elbow. This research has been carried out experimentally and numerically with the test section consist of upstream duct, 90° square elbow with R/Dh=3, CT, and downstream duct. Experimental research has used a Pitot tube, an inclined manometer, and a pressure transducer. The research has been also conducted using turbulent simulation in 3D using the k-ɛ standard turbulence model. Reynolds number (ReDh) used has been 1.6×104, 4.8×104 and 9.5×104 respectively based on hydraulic diameter. CT has been added inside the 900 elbow with angular positions (α)=5°, 10°, 15°, 20°, respectively. The gap ratio and the diameter ratio of CT have been g/Dh=0.02 and d/Dh=0.1, respectively, where g is the gap between CT with the elbow wall and d is the diameter of CT. The results have showed that the addition of CT has been able to reduce the pressure drop on square duct with 90° elbow. The effect of CT at α = 15° and Reynolds number 4.8×104 can reduce the overall pressure drop of the ducting system, about 22.14 % compared to ducting without CT.
AB - – Ducting system has two major components: straight ducts and fittings (sudden enlargement, sudden contraction, elbow, etc.). Pressure drop in the ducting system is caused mostly by friction loss, separation loss, and secondary flow. The aim of this study is to propose a method for reducing the pressure drop in the ducting system by installing a circular turbulator (CT) inside the 90° elbow. This research has been carried out experimentally and numerically with the test section consist of upstream duct, 90° square elbow with R/Dh=3, CT, and downstream duct. Experimental research has used a Pitot tube, an inclined manometer, and a pressure transducer. The research has been also conducted using turbulent simulation in 3D using the k-ɛ standard turbulence model. Reynolds number (ReDh) used has been 1.6×104, 4.8×104 and 9.5×104 respectively based on hydraulic diameter. CT has been added inside the 900 elbow with angular positions (α)=5°, 10°, 15°, 20°, respectively. The gap ratio and the diameter ratio of CT have been g/Dh=0.02 and d/Dh=0.1, respectively, where g is the gap between CT with the elbow wall and d is the diameter of CT. The results have showed that the addition of CT has been able to reduce the pressure drop on square duct with 90° elbow. The effect of CT at α = 15° and Reynolds number 4.8×104 can reduce the overall pressure drop of the ducting system, about 22.14 % compared to ducting without CT.
KW - 90° Elbow
KW - Angular Position
KW - Circular Turbulator
KW - Pressure Drop Reduction
KW - Square Duct
UR - http://www.scopus.com/inward/record.url?scp=85079443421&partnerID=8YFLogxK
U2 - 10.15866/ireme.v13i10.18148
DO - 10.15866/ireme.v13i10.18148
M3 - Article
AN - SCOPUS:85079443421
SN - 1970-8734
VL - 13
SP - 608
EP - 618
JO - International Review of Mechanical Engineering
JF - International Review of Mechanical Engineering
IS - 10
ER -