| The Reynolds Number Effects on the Projectile with an Altitude Change |
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Young-Rok Yang, Sang-Bum Hu, Young-Min Lee, Tae-Hwan Cho, Rho-Shin Myong, Chan-Woo Park |
1GNU
2KAI
3GNU & Research Center for Aircraft Parts Technology |
| 고도에 따른 발사체의 레이놀즈수 영향성 연구 |
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양영록, 허상범, 이영민, 조태환, 명노신, 박찬우 |
1경상대학교
2한국항공우주산업주식회사
3경상대학교 & 항공기부품기술연구소 |
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| Abstract |
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A research was conducted about the Reynolds number effect on the projectile with an altitude change. The atmosphere conditions change in accordance with an altitude change. It effects the Reynolds number. To confirm how the phenomena affect the trajectory of the projectile, a computer program is designed with an altitude and a range considered. The MISSILE DATCOM which is based on the semi-empirical method was utilized to get aerodynamic coefficients. The result shows that the Reynolds number considerably changes as the altitude change. It causes to change the drag coefficient of the projectile. As the Reynolds number decreases, the skin friction drag increases significantly. It causes to decrease the maximum altitude and the range. |
| Key Words:
Altitude Effects, Ballistic Trajectory, Reynolds Number Effects, Skin Friction Drag |
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