SUBOFF 모형 후방 난류항적 계측 및 실험식 유도

Abstract

This paper presents the experimental result to investigate the characteristics of turbulent wake generated by submarine. A SUBOFF nude model which was ssumed as an axial-symmetric body was used to create wake, and a thin strut was mounted on the top of the model. The experiments were conducted in a cirrculating water channel (CWC), and a hot-film was used to measure the turbulence in wake cross-section at the distance range of 0.0∼2.0L from the model. The hot film anemometer measured turbulent velocity fluctuations, and the time-averaged mean velocity and turbulent intensity are obtained from the acquired time-series data. Measurements were performed for two cases, without propeller and with propeller, respectively. Both measured results show well the general characteristics of turbulent intensity, kinetic energy and mean velocity distribution. Also, experimental equations are derived. These experimental equations show well the general characteristics of the turbulent wake behind the submerged body with simple configuration.