인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
A novel cryogenic pneumatic launcher for remote avalanche initiation has been developed and experimentally investigated. The system uses liquid nitrogen as a working medium, with its explosive evaporation triggered by the heat of a thermite reaction. The rapid phase transition of the cryofluid generates high pressure without sharp shock waves and enables smooth acceleration of soft-bodied projectiles without structural damage. This approach eliminates key drawbacks of conventional avalanche control methods, such as artillery and gas-dynamic Avalauncher systems. A laboratory-scale prototype was built (a 4-meter-long steel barrel with an outer diameter of 89 mm) equipped with an optical chronograph to measure projectile velocity (~ 1 kg). The internal ballistics were studied for thermite charges of 3-6 g and liquid nitrogen volumes of 0-200 ml. It was found that with 3 g of thermite, the optimal performance was achieved by adding ~ 100 ml of liquid N₂, resulting in a projectile speed of ~ 55 m/s, maintained up to barrel exit. Increasing the charge to 6 g of thermite and 200 ml of liquid N₂ raised the peak velocity to over 90 m/s and extended the acceleration phase. The results confirm the feasibility and advantages of the proposed. Method projectiles accelerate without damage, and the system ensures high mobility, environmental safety (no fragments), and a controlled pressure profile with sufficient delivery range. The combination of gentle acceleration and operational mobility makes the launcher promising for avalanche control and other applications.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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