목차

국 문 요 약 ························································································· ⅳ
목 차 ··································································································· ⅴ
그 림 목 차 ························································································· ⅶ
1. 서 론 ······························································································ 1
1.1 Sparkjet actuator ·············································································· 1
1.2 연구 동향 ······················································································· 3
1.3 연구 동기 ······················································································· 4
2. 본 론 ······························································································ 5
2.1 실험 개요 ······················································································· 5
2.2 실험 환경 ······················································································· 6
2.3 실험 구성 ······················································································· 6
2.3.1 저압 환경 구성 ············································································ 6
2.3.2 신호 계측 장비 구성 ······································································ 7
2.3.3 고전압 직류 회로 구성 ··································································· 7
2.3.4 유동 가시화 실험 구성 ·································································· 8
2.3.5 액츄에이터 모델 제작 ···································································· 9
3. 실험 결과 ······················································································· 13
3.1 액츄에이터에 대한 기초실험 수행 ·························································· 13
3.1.1 제트 가시화 및 초기속도 측정 실험 결과 ············································ 13
3.1.2 제트 추력신호 수집 결과 ······························································· 15
3.2 Cavity 수렴영역 길이 변화에 따른 실험 ················································ 16
3.2.1 수렴영역 길이 변화에 따른 제트 속도 변화 ········································· 16
3.2.2 수렴영역 길이 변화에 따른 제트 추력 변화 ········································· 17
3.3 방전위치 변화에 따른 실험 결과 ·························································· 18
3.3.1 방전위치 변화에 따른 제트 속도 변화 ················································ 18
3.3.2 방전위치 변화에 따른 제트 추력 변화 ················································ 19
3.3.3 제트 충격량 측정 결과 ·································································· 20
3.4 Dual spark 방전에 따른 제트 속도 변화 실험 ·········································· 21
3.4.1 Dual spark에 의한 제트속도 변화 비교 (Concurrent) ······························ 22
3.4.2 Dual spark에 의한 제트속도 변화 비교 () ···································· 22
3.4.3 Dual spark에 의한 제트속도 변화 비교 () ···································· 23
3.4.4 Dual spark에 의한 제트속도 변화 비교 ( overlap) ····························· 24
3.4.5 방전 순서에 대한 방전 조건별 제트속도 비교 ······································· 25
4. 결 론 ····························································································· 28
참 고 문 헌 ··························································································· 31
영 문 요 약 ··························································································· 33
부 록 ··························································································· 34