초록
본 연구는 Weis-Fogh형 추진기구를 장착한 모형선을 제작하여, 정지 및 주행하는 모형선에 대해 열림각 변화에 따른 주행특성과 진동특성을 조사한 것이다. 그 결과를 요약하면 다음과 같다. 추력 및 선속은 열림각이 자동 조절되는 스프링형이 가장 컸으며, 열림각 ${\alpha}=30^{\circ}$, ${\alpha}=15^{\circ}$순으로, 약 4%정도씩 작게 나타났다. 또한 모형선의 최대 진동진폭 및 RMS 값은 열림각 ${\alpha}=30^{\circ}$일 때가 가장 작게, 스프링형이 가장 크게 나타났고, 열림각이 같은 경우 정지 때보다 주행 시가 작게 나타났다.
A model ship equipped with the Weis-Fogh type ship's propulsion mechanism, which is consisted of one wing in a squared channel, was constructed. Sailing and vibration tests of the model ship were performed with the opening angles in a pool. The results are summarized as follows. The thrust and the speed of model ship were the highest for the spring-type wing of which the opening angle is automatically controlled in one stroke. Moreover, these values were approximately reduced by 4% from $30^{\circ}$ opening angle to $15^{\circ}$ in order. The maximum amplitude and RMS values of the model ship were the lowest for the wing having the opening angle of $30^{\circ}$, but were the largest for spring-type wing. And in case of the same opening angle, these values were lower for the ship on sailing than that on stationary.
