Highly Skewed Propellerの研究 : 第4報前後進時の翼面上流線とクラッシュアスターン性能

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In the previous papers the authors presented experimental and theoretical data on prope1ler open characteristics, propulsive performance characteristics, cavitation characteristics, propeller-induced fluctuating pressures and blade stresses of MAU type Conventional Propeller (CP) (MPNO.80-3), conventional 90°Highly Skewed Propeller (HSP) (MPNO.80-4) and theoretically designed 72°HSP (MPNO.80-5). Presented paper studies flows on HSP blade at ahead and astern conditions and crash astern performance of the ship equipped with HSP. First, flow visualization tests which examined flows on the blades of CP, 90°HSP and 72°HSP were carried out using depth tuft method and oil film method in order to check up the applicability of propeller theory for estimating performance characteristics of HSP and the difference between flows on the blades of CP and HSP. Second, crash astern performance simulation for a prototype container ship (SR183) equipped with CP or 72°HSP was carried out using theoretical method in order toforce taking account of characteristics of the wake distribution, is presented. Finally, examples for calculation of surface force by using the estimation method are shown. As a conclusion, it may be said that a accurate surface force can be obtained from the estimation method of surface force dealt with, from a strength or vibration point of view.
社団法人日本船舶海洋工学会の論文