CAJ | 학술논문

早期弹体滚转力矩和马格努斯效应数值计算中多采用简化弹体模型，没有考虑膛线沟槽的影响。但对小口径弹体而言，分析亚音速条件下膛线沟槽的影响对弹道计算至关重要。文中采用Fluent[1]软件对不同攻角和不同滚转速度的流场进行计算，对比光滑弹体和带沟槽弹体的流场差异，得到膛线沟槽对流场的影响规律。分析发现膛线沟槽使得滚转力矩和马格努斯力矩减小。结论认为弹体上的膛线沟槽影响较大，需要在实际工程计算中给予考虑。
조기탄체곤전력구화마격노사효응수치계산중다채용간화탄체모형，몰유고필당선구조적영향。단대소구경탄체이언，분석아음속조건하당선구조적영향대탄도계산지관중요。문중채용Fluent[1]연건대불동공각화불동곤전속도적류장진행계산，대비광활탄체화대구조탄체적류장차이，득도당선구조대류장적영향규률。분석발현당선구조사득곤전력구화마격노사력구감소。결론인위탄체상적당선구조영향교대，수요재실제공정계산중급여고필。
In previous studies, rifling grooves generally ignored in simplified model of ammunition when calculating Magnus effect and roll-ing moment of ammunition. However, due to high requirement trajectory of small caliber ammunition, effect of rifling grooves should be studied. With the help of Fluent software, the effect of rifling groove on flow field over small caliber ammunition by comparing CFD results of smooth bullet and rifling grooves bullet. Flow fields for three different angles of attack and three different rolling rates were studied. Re-sults show that the rolling moment and Magnus moment of the bullet smaller if the effect of rifling grooves considered. So the effect of rifling grooves should be considered in practical engineering calculation.