Numerical Research on Effect of Base Bleed Type on ‎Operation Process of Base Bleed Projectile

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Wang M.; Zhuo C.

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Journal Paper

Paper Information

Journal: JOURNAL OF APPLIED FLUID MECHANICS (JAFM) Year:2021 | Volume:14 | Issue:5 Page(s): 1583-1591

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Information Journal Paper

Title

Numerical Research on Effect of Base Bleed Type on ‎Operation Process of Base Bleed Projectile

Author(s)

Wang M. | Zhuo C. | Issue Writer Certificate

Keywords

Base bleed projectile

Computational fluid dynamics

Base bleed type

Firing range.‎

Abstract

The edge Base bleed type is presented in this paper. Based on the advantages of Computational fluid dynamics ‎and the firing range prediction of Base bleed projectile, the flight ballistic of Base bleed projectile with two kinds ‎of Base bleed type is solved by using the computational aerodynamics coupled with particle trajectory, obtained ‎the change laws of operation parameter, flow filed of Base bleed projectile with time. The results show that: The ‎performance of the edge Base bleed type is better than that of the traditional center Base bleed type, and the ‎fire range of the Base bleed projectile with edge type is about 2 km higher than that of the center type. The base ‎bleed parameter of the two kinds of Base bleed type at the state of drag reduction increase first and then ‎decrease with the increase of time. For the center Base bleed type, the drag coefficient increases with time. For ‎the edge Base bleed type, the drag coefficient is nearly stable at the reduction state, and is always smaller than ‎that of the center Base bleed type. The base flow structure of the edge Base bleed type does not change with ‎both the time and base bleed parameter. The base bleed gas always forms the main recirculation zone at the ‎bottom of projectile and plays the role of drag reduction‎‎.

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