TY - JOUR
T1 - Flow separation control on a race car wing with vortex gnerators in ground effect
AU - Kuya, Yuichi
AU - Takeda, Kenji
AU - Zhang, Xin
AU - Beeton, Scott
AU - Pandaleon, Ted
PY - 2009/12
Y1 - 2009/12
N2 - Flow separation control using vortex generators on an inverted wing in ground effect is experimentally investigated, and its performance is characterized in terms of forces and pressure distributions over a range of incidence and ride height.Counter-rotating and co-rotating rectangular-vane type vortex generators are tested on the suction surface of the wing.The effect of device height and spacing is investigated.The counter-rotating sub-boundary layer vortex generators and counter-rotating large-scale vortex generators on the wing deliver 23% and 10% improvements in the maximum downforce, respectively, compared with the clean wing, at an incidence of one degree, and delay the onset of the downforce reduction phenomenon.The counter-rotating sub-boundary layer vortex generators exhibit up to 26% improvement in downforce and 10% improvement in aerodynamic efficiency at low ride heights.Chordwise pressure measurement confirms that both counter-rotating vortex generator configurations suppress flow separation, while the corotating vortex generators exhibit negligible effectiveness.This work shows that a use of vortex generators, notably of the counter-rotating sub-boundary layer vortex generator type, can be effective at controlling flow separation, with a resultant improvement in downforce for relatively low drag penalty.
AB - Flow separation control using vortex generators on an inverted wing in ground effect is experimentally investigated, and its performance is characterized in terms of forces and pressure distributions over a range of incidence and ride height.Counter-rotating and co-rotating rectangular-vane type vortex generators are tested on the suction surface of the wing.The effect of device height and spacing is investigated.The counter-rotating sub-boundary layer vortex generators and counter-rotating large-scale vortex generators on the wing deliver 23% and 10% improvements in the maximum downforce, respectively, compared with the clean wing, at an incidence of one degree, and delay the onset of the downforce reduction phenomenon.The counter-rotating sub-boundary layer vortex generators exhibit up to 26% improvement in downforce and 10% improvement in aerodynamic efficiency at low ride heights.Chordwise pressure measurement confirms that both counter-rotating vortex generator configurations suppress flow separation, while the corotating vortex generators exhibit negligible effectiveness.This work shows that a use of vortex generators, notably of the counter-rotating sub-boundary layer vortex generator type, can be effective at controlling flow separation, with a resultant improvement in downforce for relatively low drag penalty.
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U2 - 10.1115/1.4000420
DO - 10.1115/1.4000420
M3 - Article
AN - SCOPUS:77955286807
VL - 131
SP - 1211021
EP - 1211028
JO - Journal of Fluids Engineering, Transactions of the ASME
JF - Journal of Fluids Engineering, Transactions of the ASME
SN - 0098-2202
IS - 12
ER -