函道螺旋桨 meaning in Chinese
ducted propeller
Examples
- In the other hand , the shroud designed properly can decrease the noise of the propeller system . so it is used widely in ships , aircraft , and is developing all along
正是由于它的这些显著的优点，函道螺旋桨被广泛的用于轮船、特种飞行器(如地效飞行器) 、潜艇等的推进系统中，而对它的研究也在不断发展中。 - The former is used widely because it avoids complex calculations . the later is used more widely with the developing of the cfd , and it can get more detail data and higher precise result for the propeller design
前者由于没有复杂的运算，也具有一定的工程实用性而被广泛应用，而后者随着计算机的发展而逐步完善，可以的来分析和计算函道螺旋桨的性能。 - In the present work , there are two methods to design the shrouded - propeller . one is based on the blade element and momentum theory , the other is based on the ufbng - line ( surface ) theory derived from circumfluence theory
在实际工作中，函道螺旋桨的设计有两种方法，一种是基于叶素理论与动量定理的工程方法；另一种是基于升力线(面)方法的环流理论方法。 - In the 1960 ' s , the circumfluence theory has been used to design the shroud - propeller , and it can be divided to two methods , one is that the profile of die shroud is provided , the other is that the pressure distribution of the shroud is provided .
到六十年代，函道螺旋桨的环流理论就可用来计算这种推进器的设计问题。本文中使用的方法是：函道用圆环涡系和圆环源、汇系模拟，用线性理论计算；螺旋桨用一个变负载的鼓动盘模拟。