TY - JOUR
ID - 14241
TI - Effect of Delta–Winglet Vortex Generators on a Forced Convection Heat Transfer in an Asymmetrically Heated Triangular Duct
JO - Anbar Journal of Engineering Sciences
JA - AENGS
LA - en
SN - 1997-9428
AU - E.Zangana, Hamid
AU - A. Abdul-Rassol, Adnan
AU - A. Al-Taher, Mohanad
AD -
Y1 - 2008
PY - 2008
VL - 1
IS - 1
SP - 31
EP - 44
KW - Heat transfer enhancement
KW - Noncircular ducts
KW - Delta
KW - Winglet Vortex Generators
KW - Turbulent flow
DO - 10.37649/aengs.2007.14241
N2 - An experimental investigation is performed to study the friction factor ( f ) and convection heat transfer coefficient (h) behavior in an asymmetrically heated equilateral triangular duct by using delta–winglets vortex generators which are embedded in a turbulent boundary layer. Two side walls of the heated test section are electrically heated with a constant heat flux, whereas the lower wall is indirectly heated. Reynolds number (Re) is ranged from (23,000) to (58,000). Two sizes and three attack angles of vortex generators are studied here for three cases; single, double, and treble pairs of generators. Each pair was supported in one wall of the test section at the various locations from the leading edge. The indicated results that friction factor ( f )and Nusselt number (Nu) are relatively proportion with the size, number and the inclination angle of the generators. The ( f ) decreases as airflow rate increases whereas Nu number increases. The present data of ( f ) is less than the data of Chegini by about (6.5 %) and overpredicts the data of Altemani by about (1.7 %).
UR - https://ajes.uoanbar.edu.iq/article_14241.html
L1 - https://ajes.uoanbar.edu.iq/article_14241_d7f43e3cf6cc81cf0a4019b6f5392b88.pdf
ER -