@Article{fdmp.2021.012108,
AUTHOR = {Zihai Geng, Jinsheng Cai, Yubiao Jiang, Weiguo Zhang},
TITLE = {On Aircraft Lift and Drag Reduction Using V Shaped Riblets},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {17},
YEAR = {2021},
NUMBER = {5},
PAGES = {899--915},
URL = {http://www.techscience.com/fdmp/v17n5/43055},
ISSN = {1555-2578},
ABSTRACT = {Reducing drag during take-off and nominal (cruise) conditions is a problem of fundamental importance in aeronautical engineering. Existing studies have demonstrated that v-shaped symmetrical riblets can effectively be used for turbulence control, with those with dimensionless depth <i>h</i><sup>+</sup> = 15 and dimensionless width <i>s</i><sup><i>+</i></sup> = 15 having the best drag reduction effect. In the present study, experimental tests have been conducted considering two models of the same size, one with smooth surface, the other with v-shaped riblets of the <i>h</i><sup>+</sup> = 15 and <i>s</i><sup><i>+</i></sup> = 15 type. The results show that for an angle of attack in the 8°~20° range (take-off stage), the maximum lift coefficient can be increased by 22%. For angle of attack between 8° and 14°, a drag reduction effect can be produced using riblets, which increases with the Reynolds number, leading to a decrease in the drag coefficient maximum of 36%. Flow visualization experiments have been carried out by means of Laser Induced fluorescence.},
DOI = {10.32604/fdmp.2021.012108}
}