압축센싱 기법을 이용한날개끝 보텍스 캐비테이션 발생위치 및 강도 추정 연구

Abstract

Currently, in propeller performance evaluation, localization and source-strength estimation of propeller cavitation are emphasized. To change this, in the current investigation, a practical estimation method using a compressive sensing framework with a hydrophone array was established. Since the signal produced by the propeller cavitation can be regarded as cyclostationary, we use the spectral kurtosis for the provision of an appropriate frequency band where the minimization problem in CS is resolved. The proposed scheme is verified through a model-scale test conducted in the large cavitation tunnel at Korea Research Institute of Ships and Ocean Engineering. For an incipient case, the localization of cavitation exhibited fairly good correlation with high-speed images. In addition, consistent increments in the estimated strength were observed with the development of cavitation.