The Development of Swirling Decaying Laminar Flow in an Annular Pipe
Work on the hydrodynamic entry length of pipe and duct flow has been well studied over the years. The assumption of fully developed flows is commonly used in many practical engineering applications (e.g. Moody's chart). For laminar axial pipe flow, the hydrodynamic entry length can be found thr...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
|
| Series: | E3S Web of Conferences |
| Online Access: | https://doi.org/10.1051/e3sconf/20185103001 |
| _version_ | 1818736122057981952 |
|---|---|
| author | Chen Baiman Qin Frank G.F. Shao Youyuan Xiao Hanmin Huang Simin Ho Kelvin |
| author_facet | Chen Baiman Qin Frank G.F. Shao Youyuan Xiao Hanmin Huang Simin Ho Kelvin |
| author_sort | Chen Baiman |
| collection | DOAJ |
| description | Work on the hydrodynamic entry length of pipe and duct flow has been well studied over the years. The assumption of fully developed flows is commonly used in many practical engineering applications (e.g. Moody's chart). For laminar axial pipe flow, the hydrodynamic entry length can be found through the monomial proposed by Kays, Shah and Bhatti (KSB) (Lh=0.056ReDh). In contrast, several approximations exist for fully turbulent flows (i.e. 10Dh-150Dh). Through theoretical and numerical investigations, the hydrodynamic entry length for swirling decaying pipe flow in the laminar regime is investigated. It was found that, the development length Lh for the axial velocity profile changes when a tangential component is added to the mean flow. The reduction in the hydrodynamic length was found to be dependent on the inlet swirl angle θ. The results indicate that a modification can be made on the KSB equation for two-dimensional swirling annular pipe flow. |
| first_indexed | 2024-12-18T00:32:07Z |
| format | Article |
| id | doaj.art-c49e655e7fb84a6e999a35be53de605e |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-18T00:32:07Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-c49e655e7fb84a6e999a35be53de605e2022-12-21T21:27:06ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01510300110.1051/e3sconf/20185103001e3sconf_icacer2018_03001The Development of Swirling Decaying Laminar Flow in an Annular PipeChen BaimanQin Frank G.F.Shao YouyuanXiao HanminHuang SiminHo KelvinWork on the hydrodynamic entry length of pipe and duct flow has been well studied over the years. The assumption of fully developed flows is commonly used in many practical engineering applications (e.g. Moody's chart). For laminar axial pipe flow, the hydrodynamic entry length can be found through the monomial proposed by Kays, Shah and Bhatti (KSB) (Lh=0.056ReDh). In contrast, several approximations exist for fully turbulent flows (i.e. 10Dh-150Dh). Through theoretical and numerical investigations, the hydrodynamic entry length for swirling decaying pipe flow in the laminar regime is investigated. It was found that, the development length Lh for the axial velocity profile changes when a tangential component is added to the mean flow. The reduction in the hydrodynamic length was found to be dependent on the inlet swirl angle θ. The results indicate that a modification can be made on the KSB equation for two-dimensional swirling annular pipe flow.https://doi.org/10.1051/e3sconf/20185103001 |
| spellingShingle | Chen Baiman Qin Frank G.F. Shao Youyuan Xiao Hanmin Huang Simin Ho Kelvin The Development of Swirling Decaying Laminar Flow in an Annular Pipe E3S Web of Conferences |
| title | The Development of Swirling Decaying Laminar Flow in an Annular Pipe |
| title_full | The Development of Swirling Decaying Laminar Flow in an Annular Pipe |
| title_fullStr | The Development of Swirling Decaying Laminar Flow in an Annular Pipe |
| title_full_unstemmed | The Development of Swirling Decaying Laminar Flow in an Annular Pipe |
| title_short | The Development of Swirling Decaying Laminar Flow in an Annular Pipe |
| title_sort | development of swirling decaying laminar flow in an annular pipe |
| url | https://doi.org/10.1051/e3sconf/20185103001 |
| work_keys_str_mv | AT chenbaiman thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT qinfrankgf thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT shaoyouyuan thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT xiaohanmin thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT huangsimin thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT hokelvin thedevelopmentofswirlingdecayinglaminarflowinanannularpipe AT chenbaiman developmentofswirlingdecayinglaminarflowinanannularpipe AT qinfrankgf developmentofswirlingdecayinglaminarflowinanannularpipe AT shaoyouyuan developmentofswirlingdecayinglaminarflowinanannularpipe AT xiaohanmin developmentofswirlingdecayinglaminarflowinanannularpipe AT huangsimin developmentofswirlingdecayinglaminarflowinanannularpipe AT hokelvin developmentofswirlingdecayinglaminarflowinanannularpipe |