초록

film detonation 실험용 shock tube (길이 : 558㎝, 단면 : 4.16×4.16㎝)를 설계 ·제작하여, 저휘발성 oil인 n-octanol을 시료로 실험을 수행하였으며, High Speed Camera(max. 50만 fps)를 이용하여 폭발전파과정을 20만 fps의 속도로 촬영하였다. 또한, 압력, 전파속도등의 폭발특성도 조사하여 분석하였다.아울러, 본 연구에 이어서 전파기구의 규명 및 simulation을 위한 연구가 2차적으로 계속 진행될 것이다.

Abstract ▼

This report is devoted to the experimental study of film detonation wherein the fuel is in the form of a liquid layer on the wall of a tube and oxidizer is gaseous.The experiments were conducted in a shock tube with one wall coated with a thin layer of n-octanol, a very nonvolatile fuel. The oxidize

This report is devoted to the experimental study of film detonation wherein the fuel is in the form of a liquid layer on the wall of a tube and oxidizer is gaseous.The experiments were conducted in a shock tube with one wall coated with a thin layer of n-octanol, a very nonvolatile fuel. The oxidizer was gaseous oxygen. Initiation of detonation was accomplished by a shock wave from an initiator connected to the shock tube with the wetted wall. Piezoelectric pressure transducers were used to determine the pressure ratio of secondary shock wave to shock front, and the propagation velocity. The structure and propagation mechanism were investigated by means of high speed photography (schlieren, 2 ×10 5 fps).It was shown that the pressure of secondary shock wave was 1∼2 times the pressure of shock front, the propagation velocity was about 990 m/s and nearly plateau velocity was obtained where an increase in the fuel-to-oxygen mixture ratio did not influence the propagation velocity. By schlieren photograph, the process of transition to detonation was found to be similar to gaseous detonations but the process was repeated periodically, and it was different in this point from gaseous detonation.

목차 Contents

• 제1장 서 론...13
• 제2장 Film Detonation의 개요...15
• 2-1 정 의...15
• 2-2 전파조건...16
• 2-3 사고의 예...17
• 2-4 연구동향...19
• 제3장 실험장치 및 방법...20
• 3-1 Shock Tube...20
• 3-2 실험방법...23
• 제4장 실험결과 및 해석...25
• 4-1 압 력...25
• 4-2 전파속도...27
• 4-3 전파기구...30
• 제5장 결 론...35
• 참 고 문 헌...36