The invention relates to a ship dynamic differential pressure propeller. A propeller blade (type) of the ship dynamic differential pressure propeller comprises an upper airfoil and a lower airfoil. The section lines of the airfoils are all composed of curves of a monotonically decreasing function from the front edge to the rear edge. The structure is simple, and when the lower wing surface acts on water, the flow speed is reduced, the static pressure is increased, and upward thrust is generated; the upper airfoil does not do work, water flows back, static pressure is reduced, the airfoils generate upward pulling force, and therefore lift force of the upper airfoil and the lower airfoil is consistent and upward, the sum of the lift force is larger than that of an existing single-face airfoil, and the efficiency of the propeller wing is improved.
本发明涉及一种船动压差螺旋桨,其桨叶(型)包括上翼面和下翼面组成。其翼面截线均由前缘至后缘单调下降函数的曲线组成。本发明结构简单,在下翼面对水做功下,流速减慢,静压强增高,产生向上的推力;上翼面不做功,水流倒流,静压强减小,翼面产生向上的拉力,从而构成上、下翼面升力一致向上,二者升力之和大于现有的单面翼型升力,提高桨翼效率。
Ship dynamic differential pressure propeller
一种船动压差螺旋桨
2022-12-13
Patent
Elektronische Ressource
Chinesisch
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |
SHIP PROPELLER MOUNTING BRACKET, SHIP PROPELLER AND SHIP
Europäisches Patentamt | 2023
|Pressure field near ship propeller
Engineering Index Backfile | 1958
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