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ichthyoid adj.像魚的,魚狀的。n.魚形脊椎動物。

ichthyol

Compared to an ordinary rudder , the value of lift coefficient of ichthyoid rudder is about 30 % higher and the maximum rudder angle of it nearly reaches 45 degrees . ichthyoid rudder is a design under such a conception as to effectively utilize the propellers slipstream for rudder action , and featured by having a fish - shaped one - piece construction that is to say - no part of ichthyoid rudder can move in the water 其研究的魚形舵是一個沒有在水下移動的魚尾形剖面單片結構,增加了全舵的剖面拱度,使螺旋槳尾流的折射水量增強,進而增大了水動力的作用,使之比普通流線形舵的升力提高30左右。

The results of the lift interference are given here as a result of a series of rudder of different aspect ration fitted to different location of the fornication . in the second part , the device of open water experiment of ichthyoid rudder is present 提出了一個估算魚形舵定常升力的方法,計算了一系列不同展弦比、不同翼型、不同位置分叉點及尾緣剖分角對魚形舵影響下的升力。

In the first part , the steady nonlinear vortex lattice method is adopted to calculate the hydrodynamic characteristics of open water ichthyoid rudder , and the induced velocity of ichthyoid rudder is calculated using panel method 本文理論計算部分,采用定常非線性渦格法計算魚形舵的水動力性能,用面元方法計算舵流場的誘導速度。

In addition , the data needed to survey and the equation concerned is given . the elements that affect the hydrodynamic characteristics of ichthyoid rudder are analyzed 在試驗設計部分,給出了魚形舵敞水試驗的具體思路,有關設備、裝置,需要測量的主要數據,處理數據所要用到的主要公式等。

The theoretical calculation method about how to predict the hydrodynamic characteristics of ichthyoid rudder is proposed in this paper 本文提出了一種魚形舵定常升力的水動力性能預報的理論預報方法。