Experimental Research on Propeller-Hull Vortex Cavitation
スポンサーリンク
概要
- 論文の詳細を見る
When a ship propeller operates under a highly loaded condition, unsteady line vortex cavitation may occur between it and the nearby hull surface. This cavitation is known as propeller-hull vortex cavitation (PHVC) and its occurrence causes big stern vibration and noise. The author assumed the line vortex cavitation that occurs between the propeller and plate and is considered to be closely related to the PHVC and conducted two or three experimental researches in the IHI cavitation tunnel to clarify the causes of PHVC, phenomenal mechanism and growth process, and obtained the following results: 1) PHVC is a cavitation phenomenon of the vortex core or vortex tube of the PHV that is formed between the propeller and plate (or hull). The occurrence of the PHV is attributable to the intensity of the hydrodynamic interaction between the propeller and plate (hull) and it is promoted if a vortex-making flow field exists near the propeller. 2) PHVC and PHV can be experimentally controlled as a series of phenomena of PHVC→←PHV→←NON-PHV, if the propeller load coefficient C_T, tip clearance-diameter ratio C/D and flow caviation number σ_0 are properly used as the control factors. 3) The pressure in the center (or core) of the PHV decreases earlier near the propeller side than the plate side. Therefore, the PHVC occurs from the propeller side and grows toward the plate side. When the PHVC disappears, it decreases and disappears from the plate side to the propeller side. 4) PHVC characteristically repeats an occurrence period and non-occurrence period. The occurrence period can be divided into the inception period, growth period and decrease period and desinence.
- 社団法人日本船舶海洋工学会の論文
- 1986-03-01
著者
関連論文
- Experimental Research on Propeller-Hull Vortex Cavitation
- Cavitation Erosion Test on a Solder Coated Model Propeller
- Full Scale Propeller Cavitation Observations and Model Experiments
- プロペラの設計法に関する研究
- 均一流の中の螺旋推進器の流場について