The effect of the entrance hub geometry on the efficiency in an axial flow fan

Jae Hyuk Jung, Won Gu Joo

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The improvement in efficiency of axial flow fans is major concern in turbomachinery industries including outdoor units of air conditioners. The end wall region is responsible for losses in axial flow fan. Researches on the relationship between the efficiency and the vortex occurring on the hub with a short length have been little found in the literature. Variations of the vortical flow field and the effects on the efficiency have been investigated with the entrance hub length and corner shape of the axial flow fan. The losses and the efficiency were evaluated by the stagnation pressure loss coefficient distribution calculated using commercial CFD solver SC/Tetra v12. The results show the efficiency was improved at specific entrance hub length due to the interaction between the hub vortex and the blade.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalInternational Journal of Refrigeration
Publication statusPublished - 2019 May

Bibliographical note

Funding Information:
This work was supported by the Korea Evaluation Institute of Industrial Technology (KEIT) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 10084659) . Author is enrolled in Ph.D. course as dispatched from LG electronics with tuition provided by LG electronics.

Publisher Copyright:
© 2019 Elsevier Ltd and IIR

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering


Dive into the research topics of 'The effect of the entrance hub geometry on the efficiency in an axial flow fan'. Together they form a unique fingerprint.

Cite this