TY - JOUR
ID - 2403
TI - Aerodynamic Characterization of Bullet Heads with Different Arcuate Curves
JO - Journal of Applied Fluid Mechanics
JA - JAFM
LA - en
SN - 1735-3572
AU - Hao, B.
AU - Jiang, Q.
AU - Xu, C.
AU - Liu, L.
AD - School of Mechanical Engineering and Automation, Northeastern University, Shenyang110819, China
AD - School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao066004, China
Y1 - 2024
PY - 2024
VL - 17
IS - 5
SP - 1015
EP - 1026
KW - Arcuate Curve
KW - Drag coefficient
KW - Lift Coefficient
KW - Power exponent
KW - Computational fluid dynamics
DO - 10.47176/jafm.17.05.2333
N2 - The bullet shape is critical in efficient bullet design because it affects the lift and drag forces. This paper proposes a new bullet shape with a logarithmic curve and analyzes the lift and drag coefficients of bullets with different curves under different angles of attack. The results are compared with a bullet whose shape is described by the power law curve. Fluent simulations demonstrate that the optimal power exponent values are 0.65, 0.6, and 0.65 for the bullet with the power law curve and 1.3, 1, and 1 for the bullet with the logarithmic curve at 0°, 30°, and 40° angles of attack, respectively. At a 0° angle of attack, the lift coefficient of the logarithmic curve is the largest. The lift force of the bullet with the logarithmic curve is 129.4% higher than that with the von Karman curve. The drag coefficient is the largest for the bullet with the rectilinear curve; it is 1.30% larger than that of the bullet with the logarithmic curve. At 30° and 40° angles of attack, the lift coefficient of the bullet with the power law curve is larger. The difference in the lift coefficients between the two angles of attack is 18.47%. The bullet’s drag coefficient is the largest for the logarithmic curve, and the difference in the drag coefficients between the two angles of attack is 18.59%.
UR - https://www.jafmonline.net/article_2403.html
L1 - https://www.jafmonline.net/article_2403_c47a87f576b5d1e06766d5de69205d0a.pdf
ER -