| Autor: |
Tabish Alam, R. P. Saini, J. S. Saini |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Advances in Mechanical Engineering, Vol 6 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1687-8132 |
| DOI: |
10.1155/2014/948313 |
| Popis: |
This paper presents the thermohydraulic performance of rectangular solar air heater duct equipped with V-shaped rectangular perforated blocks attached to the heated surface. The V-shaped perforated blocks are tested for downstream (V-down) to the air flow at Reynolds number from 2000 to 20000. The perforated blocks have relative pitch ratio ( P/e ) from 4 to 12, relative blockage height ratio ( e/H ) from 0.4 to 1.0, and open area ration from 5% to 25% at a fixed value of angle of attack of 60 ∘ in a rectangular duct having duct aspect ratio ( W/H ) of 12. Thermohydraulic performance is compared at different geometrical parameters of V-shaped perforated blocks for equal pumping power which shows that maximum performance is observed at a relative pitch of 8, relative rib height of 0.8, and open area ration of 20%. It is also observed that the performance of V-shaped perforated blocks was better than transverse-perforated blocks. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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