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**Harvard**

Han, X. och Krajnovic, S. (2012) *Large eddy simulation of ﬂow control around a cube subjected to momentum injection*.

** BibTeX **

@conference{

Han2012,

author={Han, Xingsi and Krajnovic, Sinisa},

title={Large eddy simulation of ﬂow control around a cube subjected to momentum injection},

booktitle={7th International Symposium on Turbulence, Heat and Mass Transfer, 24-27 Sep. 2012, Palermo, Sicily, Italy},

abstract={The concept of Momentum Injection (MI) through Moving Surface Boundary-layer Control
(MSBC) applied to a cubic structure is numerically studied using large eddy simulation at a Reynolds num-
ber of 6.7 × 104 . Two small rotating cylinders are used to add the momentum at the front vertical edges
of the cube. Two conﬁgurations are studied with the yaw angle of 0◦ and 30◦ , respectively, with ratio of
the rotation velocity of cylinders and the freestream velocity of 2. The results suggest that MI delays the
boundary layer separation and reattachment, and thus reduces the drag. A drag reduction of about 6.2% is
observed in the 0◦ yaw angle case and about 45.3% reduction in the 30◦ yaw angle case. In the case of 0◦
yaw angle, the main change of the ﬂow ﬁeld is the disappearance of the separation regions near the rotating
cylinders and the wake region is slightly changed due to MI. In the 30◦ yaw angle case, the ﬂow ﬁeld is
changed a lot. Large ﬂow separations near one rotating cylinder and in the wake is signiﬁcantly reduced,
which results in the large drag reduction. Meanwhile, the yaw moment is increased about 44.7%.},

year={2012},

}

** RefWorks **

RT Conference Proceedings

SR Print

ID 160678

A1 Han, Xingsi

A1 Krajnovic, Sinisa

T1 Large eddy simulation of ﬂow control around a cube subjected to momentum injection

YR 2012

T2 7th International Symposium on Turbulence, Heat and Mass Transfer, 24-27 Sep. 2012, Palermo, Sicily, Italy

AB The concept of Momentum Injection (MI) through Moving Surface Boundary-layer Control
(MSBC) applied to a cubic structure is numerically studied using large eddy simulation at a Reynolds num-
ber of 6.7 × 104 . Two small rotating cylinders are used to add the momentum at the front vertical edges
of the cube. Two conﬁgurations are studied with the yaw angle of 0◦ and 30◦ , respectively, with ratio of
the rotation velocity of cylinders and the freestream velocity of 2. The results suggest that MI delays the
boundary layer separation and reattachment, and thus reduces the drag. A drag reduction of about 6.2% is
observed in the 0◦ yaw angle case and about 45.3% reduction in the 30◦ yaw angle case. In the case of 0◦
yaw angle, the main change of the ﬂow ﬁeld is the disappearance of the separation regions near the rotating
cylinders and the wake region is slightly changed due to MI. In the 30◦ yaw angle case, the ﬂow ﬁeld is
changed a lot. Large ﬂow separations near one rotating cylinder and in the wake is signiﬁcantly reduced,
which results in the large drag reduction. Meanwhile, the yaw moment is increased about 44.7%.

LA eng

OL 30