The study on the effect of inlet disturbance body insertion on the flow pressure drop in a 90°square elbow

Randi Purnama Putra*, Sutardi, Wawan Aries Widodo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationDisruptive Innovation in Mechanical Engineering for Industry Competitiveness
Subtitle of host publicationProceedings of the 3rd International Conference on Mechanical Engineering, ICOME 2017
EditorsVivien S. Djanali, Suwarno, Bambang Pramujati, Volodymyr A. Yartys
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416994
DOIs
Publication statusPublished - 13 Jul 2018
Event3rd International Conference on Mechanical Engineering, ICOME 2017 - Surabaya, Indonesia
Duration: 5 Oct 20176 Oct 2017

Publication series

NameAIP Conference Proceedings
Volume1983
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Conference on Mechanical Engineering, ICOME 2017
Country/TerritoryIndonesia
CitySurabaya
Period5/10/176/10/17

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