scholarly journals Sliding discharge plasma actuation for forebody vortex control on a slender body at high angles of attack

AIP Advances ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 055103 ◽  
Author(s):  
Borui Zheng ◽  
Ming Xue ◽  
Chang Ge
Keyword(s):  
Discharge Plasma ◽  
Slender Body ◽  
Vortex Control ◽  
Plasma Actuation ◽  
Sliding Discharge ◽  
High Angles Of Attack

Strakes Effects on Asymmetric Flow Over a Blunt-Nosed Slender Body at a High Angle of Attack

2018 ◽  
Vol 141 (6) ◽  
Author(s):  
Qihang Yuan ◽  
Yankui Wang ◽  
Zhongyang Qi
Keyword(s):  
Angle Of Attack ◽  
Slender Body ◽  
Axial Position ◽  
High Angle ◽  
Asymmetric Flow ◽  
High Angle Of Attack ◽  
Side Force ◽  
Asymmetric Vortices ◽  
High Angles Of Attack ◽  
Blunt Nose

In general speaking, the missiles execute flight at high angles of attack in order to enhance their maneuverability. However, the inevitable side-force, which is caused by the asymmetric flow over these kinds of traditional slender body configurations with blunt nose at a high attack angle, induces the yawing or rolling deviation and the missiles will lose their predicted trajectory consequently. This study examines and diminishes the side-force induced by the inevitable asymmetric flow around this traditional slender body configuration with blunt nose at a high angle of attack (AoA = 50 deg). On one hand, the flow over a fixed blunt-nosed slender body model with strakes mounted at an axial position of x/D = 1.6–2.7 is investigated experimentally at α = 50 deg (D is the diameter of the model). On the other hand, the wingspan of the strakes is varied to investigate its effect on the leeward flow over the model. The Reynolds number is set at ReD = 1.54 × 105 based on D and incoming upstream velocity. The results verify that the formation of asymmetric vortices is hindered by the existence of strakes, and the strake-induced vortices develop symmetrically and contribute to the reduction in side-force of the model. In addition, the increase in strake wingspan reduces asymmetric characteristics of the vortex around the model and causes a significant decrease in side-force in each section measured. The strake with the 0.1D wingspan can reduce the sectional side-force to 25% of that in the condition without strakes.

Optimized plasma actuation on asymmetric vortex over a slender body

2018 ◽  
Vol 112 (1) ◽  
pp. 014101 ◽  
Author(s):  
Yuexiao Long ◽  
Huaxing Li ◽  
Xuanshi Meng ◽  
Haiyang Hu
Keyword(s):  
Slender Body ◽  
Asymmetric Vortex ◽  
Plasma Actuation

Experimental investigations of the asymmetric vortex formation over a slender body of revolution at high angles of attack

2020 ◽  
Vol 34 (14n16) ◽  
pp. 2040089
Author(s):  
Yiding Zhu
Keyword(s):  
Vortex Formation ◽  
The Body ◽  
Slender Body ◽  
Experimental Investigations ◽  
Initial Growth ◽  
Body Of Revolution ◽  
Momentum Exchange ◽  
Time Resolved ◽  
High Angles Of Attack ◽  
Slender Body Of Revolution

This paper describes an experimental investigation of the initial growth of flow asymmetries over a slender body of revolution at high angles of attack with natural and disturbed noses. Time-resolved particle image velocimetry (PIV) is used to investigate the flow field around the body. Flow visualization clearly shows the formation of the asymmetric vortices. Instantaneous PIV shows that the amplified asymmetric disturbances lead to Kelvin–Helmholtz instability appearing first on one side, which increases the momentum exchange crossing the layer. As a result, the separation region shrinks which creates the initial vortex asymmetry.

Experimental Investigation on the Characteristics of Sliding Discharge Plasma Aerodynamic Actuation

2011 ◽  
Vol 13 (5) ◽  
pp. 608-611 ◽  
Author(s):  
Huimin Song ◽  
Yinghong Li ◽  
Qiaogen Zhang ◽  
Min Jia ◽  
Yun Wu
Keyword(s):  
Experimental Investigation ◽  
Discharge Plasma ◽  
Sliding Discharge
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