Bullet Turning at Trajectory Apex

Timo Sailaranta; Tomi Honkanen; Arttu Laaksonen; Ari Siltavuori

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Bullet Turning at Trajectory Apex

机译：弹道转向尖顶

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A numerical study is carried out to investigate a 7.62-mm bullet turning at the trajectory apex, particularly when fired vertically. The bullet model includes an aerodynamic model, which basically covers angles of attack up to 180°. Computational fluid dynamics are used to estimate the aerodynamic properties at the high angles of attack. The role of aerodynamic moment, and particularly Magnus phenomena, in turning at the apex is studied. A positive Magnus moment tilts the total aerodynamic moment vector clockwise and generally drives the bullet turning nose down. The bullet turning was detected through a flat spin-type maneuver. The Magnus-moment oscillatory behavior and/or the Magnus-moment-caused bullet instability may occur during the turning at the trajectory apex. These were found to have a negligible effect on the bullet-turning launch angle, but they may contribute considerably to the bullet falling-phase behavior. Possibilities to affect the bullet descending part of the flight are also shortly considered.

机译：进行了数值研究，以研究在弹道顶点处7.62毫米子弹的转动，尤其是垂直发射时。子弹模型包括空气动力学模型，该模型基本上涵盖了高达180°的迎角。计算流体动力学用于估计大迎角的空气动力学特性。研究了空气动力力矩，尤其是马格努斯现象，在转弯顶点时的作用。正的马格努斯力矩使总空气动力学力矩矢量顺时针倾斜，并通常使子弹朝下旋转。通过扁平旋转式机动检测到子弹转向。在轨迹顶点转弯期间可能会发生马格努斯矩的振荡行为和/或马格努斯矩引起的子弹不稳定性。发现这些对子弹转弯发射角的影响可忽略不计，但它们可能对子弹落相行为有很大影响。不久还将考虑影响飞行中子弹下降部分的可能性。

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来源
《Journal of aerospace engineering》 |2014年第5期|04014030.1-04014030.11|共11页
作者
Timo Sailaranta; Tomi Honkanen; Arttu Laaksonen; Ari Siltavuori;
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作者单位

Dept. of Applied Mechanics, Aalto Univ., P.O. Box 14400, FI-00076 Aalto, Finland;

Dept. of Applied Mechanics, Aalto Univ., P.O. Box 14400, FI-00076 Aalto, Finland;

Dept. of Applied Mechanics, Aalto Univ., P.O. Box 14400, FI-00076 Aalto, Finland;

Dept. of Applied Mechanics, Aalto Univ., P.O. Box 14400, FI-00076 Aalto, Finland;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Bullet; Ballistics; Magnus effect; Trajectory; Computational fluid dynamics (CFD);

机译：子弹;弹道;马格努斯效应;弹道;计算流体动力学（CFD）;

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专利

1. Upwards fired bullet turning at the trajectory apex [J] . T. Sailaranta, A. Pankkonen, A. Siltavuori Applied mathematical sciences . 2011,第25a28期

机译：向上发射的子弹在轨迹顶点处转弯
2. Upwards fired bullet turning at the trajectory apex [J] . T. Sailaranta, A. Pankkonen, A. Siltavuori Applied mathematical sciences . 2011,第25a28期

机译：向上发射的子弹在轨迹顶点处转弯
3. Synergy of CT and MRI in detecting trajectories of lodged bullets in decedents and potential hazards concerning the heating and movement of bullets during MRI [J] . Gascho Dominic, Tappero Carlo, Zoelch Niklaus, Forensic science, medicine, and pathology . 2020,第1期

机译：CT和MRI的协同作用在人们在DECENEN中提取的子弹的轨迹和潜在的危险中MRI期间的加热和运动
4. STUDY ON THE METHOD OF TERMINAL TRAJECTORY TO EXTERNAL BALLISTICS TO TERMINAL TRAJECTORY OF BULLET PENETRATING GLASS [C] . Jin-ming Li, Yong-jie Qu, Hai-tao Lu, International symposium on ballistics . 2019

机译：子弹对玻璃弹射的终端弹道对外部弹道的方法研究
5. Trajectory reconstruction by analysis of trace evidence on spent bullets fired through building materials: Analysis by microscopy and direct analysis in real time. [D] . Edison, William James. 2014

机译：通过对通过建筑材料发射的用过的子弹的痕迹证据进行分析来重建弹道：通过显微镜分析和实时直接分析。
6. Is estimated bullet trajectory a reliable predictor of severe injury? Case report of a thoraco-abdominal gunshot with a protracted trajectory managed nonoperatively [O] . Muhammad Sohaib Khan, Bilal Masood Khan, Sumbul Naz, 2013

机译：估计的子弹轨迹是严重伤害的可靠预测指标吗？胸腹开火轨迹延长治疗不全的病例报告
7. Is estimated bullet trajectory a reliable predictor of severe injury? Case report of a thoraco-abdominal gunshot with a protracted trajectory managed nonoperatively [O] . Muhammad Sohaib Khan, Bilal Masood Khan, Sumbul Naz, 2013

机译：估计的子弹轨迹是严重伤害的可靠预测指标吗？胸腹开火轨迹延长治疗不全的病例报告

Bullet Turning at Trajectory Apex

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