単螺旋船の旋回性能についての一考察(日本航海学会第7回講演会)
スポンサーリンク
概要
- 論文の詳細を見る
It is well known that, when a single-screw ship goes on ahead by keeping the rudder amidships, synthetic action of screw current, wake current, and sidewise pressure appon the proppeller blades causes her course deviation. In this paper the author investigated the effects of above actions to the turning circle of a ship by means of model experiment and turning trials of cargo and fishing boats. Therefore the results tested on the right handed single-screw vessels are as follows: (1) Generally the turning circle with starboard helm is larger than other circle with port helm. And this was remarkably perceived in small ships which have large R.P.M. of propeller. (2) The difference between above both turning circles is incrsased relative to small helm angle, large velocity and rudder area. According to the above mentsoned results, moreover, the forces causing the ship's course deviation are considered as follows ; (1) The sidewise forces upon propeller blades. a) If the propeller is nearer to the water surface, the differnce of pressure on the upper and lower halves of propeller disc, being caused by air suction, exerts the sidewise force on it. b) Sidewise component forces are generated upon the rotating blades, due to non-homogeneous suction current drawn in from both isles of the run. (2) The sidewise force upon rudder plate. The screw current that is influenced wake current striks both sides of the rudder plate asymmetrically, and then by the sidewise force is exerted on it.
- 社団法人日本航海学会の論文
- 1952-09-20
著者
関連論文
- 定常旋回直径の計算図表について(日本航海学会第33回講演会)
- 旋回圏の算定式について : 第3報 実船に対する実用算定式(日本航海学会第21回講演会)
- 旋回圏の算定式について : 第2報 模型実験による算定係数(日本航海学会第18回講演会)
- 旋回圏の算定式について(日本航海学会第16回講演会)
- トリム及び吃水の図的計算法について(日本航海学会第12回講演会)
- 単螺旋船の旋回性能についての一考察(日本航海学会第7回講演会)