TY - GEN
T1 - The study on the effect of inlet disturbance body insertion on the flow pressure drop in a 90°square elbow
AU - Putra, Randi Purnama
AU - Sutardi,
AU - Widodo, Wawan Aries
N1 - Publisher Copyright:
© 2018 Author(s).
PY - 2018/7/13
Y1 - 2018/7/13
N2 - Airduct system is not only a straight pipe, but there are also piping fittings/accessories such as 90°elbows. These pipe accessories work so air ducts can be installed as needed. However, the use of these piping accessories causes an increase in pressure drop due to friction loss, separation loss and secondary flow that occurs after the flow passes through the fittings. There is a considerable pressure drop on the ducting system, then the fluid flow will suffer a considerable energy loss as well. A method to reduce the pressure drop that occurs in the 90°elbow is by adding an inlet disturbance body (IDB). This study was conducted numerically and experimentally on a square duct with hydraulic diameter Dh = 125 mm and curvature ratio R/Dh = 1.5. Inlet disturbance body (IDB) is placed at the inner upstream side of the duct before the 90°inlet elbow with variation on distance l/Dh = 0.1 - 0.5, constant gap g/d = 0.2 and d/Dh = 0.1. Reynolds number (ReDh) is 3.97 × 104 < ReDh < 13.5 × 104. The turbulence model is k-ϵ realizable. From this research it can be obtained information that the use of IDB effectively recovers flows process and overcomes the negative effect of the secondary flow. IDB placement of the channel with distance l/Dh = 0.1 is the most effective distance to reduce pressure drop with decrease of 17.68%. While IDB with distance variation l/Dh = 0.5 has the highest pressure drop.
AB - Airduct system is not only a straight pipe, but there are also piping fittings/accessories such as 90°elbows. These pipe accessories work so air ducts can be installed as needed. However, the use of these piping accessories causes an increase in pressure drop due to friction loss, separation loss and secondary flow that occurs after the flow passes through the fittings. There is a considerable pressure drop on the ducting system, then the fluid flow will suffer a considerable energy loss as well. A method to reduce the pressure drop that occurs in the 90°elbow is by adding an inlet disturbance body (IDB). This study was conducted numerically and experimentally on a square duct with hydraulic diameter Dh = 125 mm and curvature ratio R/Dh = 1.5. Inlet disturbance body (IDB) is placed at the inner upstream side of the duct before the 90°inlet elbow with variation on distance l/Dh = 0.1 - 0.5, constant gap g/d = 0.2 and d/Dh = 0.1. Reynolds number (ReDh) is 3.97 × 104 < ReDh < 13.5 × 104. The turbulence model is k-ϵ realizable. From this research it can be obtained information that the use of IDB effectively recovers flows process and overcomes the negative effect of the secondary flow. IDB placement of the channel with distance l/Dh = 0.1 is the most effective distance to reduce pressure drop with decrease of 17.68%. While IDB with distance variation l/Dh = 0.5 has the highest pressure drop.
UR - http://www.scopus.com/inward/record.url?scp=85050481809&partnerID=8YFLogxK
U2 - 10.1063/1.5046212
DO - 10.1063/1.5046212
M3 - Conference contribution
AN - SCOPUS:85050481809
T3 - AIP Conference Proceedings
BT - Disruptive Innovation in Mechanical Engineering for Industry Competitiveness
A2 - Djanali, Vivien S.
A2 - Suwarno, null
A2 - Pramujati, Bambang
A2 - Yartys, Volodymyr A.
PB - American Institute of Physics Inc.
T2 - 3rd International Conference on Mechanical Engineering, ICOME 2017
Y2 - 5 October 2017 through 6 October 2017
ER -