Numerical Study of Sabot Position Effects on Projectile Aerodynamics

脫殼彈護殼位置的氣動力效應

林晃(Huang Lin) ； 賴君亮(Chun-Liang Lai)

《中國航空太空學會學刊》 27卷4期 (1995/12) Pp. 355-363

https://doi.org/10.6124/TAASRC.199512_27(4).08

摘要

本文以TVD有限差分法，有系統的求解出無黏生流體在流經不同護殼位置的脫殼穿甲彈時，彈體四週的流場狀況。結果顯示，當護殼位置夠前移時，弧形震波將在彈體的圓錐面生成，否則，弧形震波將位於彈體的圓柱面。對於這兩種因不同護殼位置所造成的流場，彼此間的流場狀態，震波位置，以及沿彈體和護殼表面的壓力分佈都有很大的不同。當弧形震波的位置靠近彈體間錐面與圓柱面相交的位置時，流場的計升將變得不穩定而不易預期。

關鍵字

護殼 ； 弧形震波 ； 前置位置 ； 後置位置 ； 全變量消失法

並列摘要

Euler calculations based on the TVD method are performed in the present study to investigate systematically the geometrical effect on the saboted projectile aerodynamics due to the different sabot positions. When the sabot is located frontward enough, a bow shock may exist at the conical part of the penetrator. Otherwise, the bow shock wil1 occur at the cylindrical part of the penetrator. As a result, the flow field, shock position, and pressure distribution along the body surface are quite different from each other for these two kinds of sabot position. Unsteady flow may exist when the position of the bow shock at the penetrator is located quite close to the juncture of the conical and the cylindrical parts of the penetrator.

並列關鍵字

sabot ； bow shock ； afore-sited ； aft-sited ； TVD method