| 1. | Blade section designed based on equivalent operating curve can effectively control the cavitaion area and type , and the desired cavitation performance can obtained
基于等效运转曲线设计的桨叶剖面能有效地控制空泡范围和空泡类型，得到期望的空泡性能。 |
| 2. | By a typical example of blade measurement , the software gets a higher efficiency , the measurement of each blade section costs 1 minute in average
以3 . 4223x型叶片为例进行了现场实验测试,软件具有较高的测量效率,平均测量一个叶片的截面只需1分钟时间。 |
| 3. | The blade section can be designed by parent section , thereby its chordwis circulation distributions can be worked out , and then lifting surface theory is used to design the three dimension blade geometry
剖面采用母型剖面方法来设计，进而可确定桨叶弦向环量分布，然后由升力面理论设计三维桨叶的几何形状。 |
| 4. | Hd propellers are a type of marine propellers having new blade sections , moderate skew and a small area - ratio , with the virtues of higher efficiency , lower vibration and noise and lighter weight
沪东型( hd )螺旋桨是一种新型的叶剖面、中等侧斜、小盘面比的螺旋桨。它具有效率高、振动和噪音低、重量轻等优良性能。 |
| 5. | This paper presents a design method of propeller blade section operating in non - uniform flow field and an idea of equivalent operating curve with unchanged cavitations characteristic on blade section , the method for selecting the curve is set up
摘要给出了非均匀流场中螺旋桨桨叶剖面的设计方法，提出了保持剖面空泡特征不变的等效运转曲线的思想，并创建了等效运转曲线的确定方法。 |
| 6. | Comparisons also made among the calculated data of above two methods for the pressure distribution on blade section of the hd propeller and mau propeller , the results shown that the pressure distribution of the hd propeller is much uniform than the those of mau propeller
两种理论预报的沪东型( hd )螺旋桨和mau图谱桨的叶切面压力分布比较，结果表明，沪东型( hd )螺旋桨叶切面的压力分布较mau图谱桨均匀。 |
| 7. | To avoid or reduce these trouble induced by the unsteady cavitation , the theoretical design method for propeller and the blade section with the good cavitation performance are adopted to enlarge the cavitation bucket width and control the range and type of the cavitation on the blade . this enables propeller to operate in the non - uniform ship wake rather well
为了避免或减缓空泡带来的危害，采用螺旋桨理论设计方法和空泡性能优良的桨叶剖面来增加空泡斗宽度和控制桨叶空泡范围及空泡类型，以适应非均匀流场中螺旋桨工作的需要。 |
