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。
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。
Win2000 bed lift is of personalized design , ultra - stable operation , to offer quietness and comfortableness to the greatest extent to patients with warm colors . it is provided with variable voltage variable frequency device , to produce the best operating curve in accordance with the physiological requirements of human body , to show make the safe , comfort , stable and excellent perfomance in the whole process during the operation of the lift from start , acceleration , deceleration to stop . optional cut - off emergency leveling device may be equiooed at the demand of user to ensure that the passengers inside the lift can be rescued in case of power cut - off accident Win2000系列病床电梯以人性化的设计,超平稳的运行,给予病患者最大程度的安静舒适增添温馨的色彩。采用先进vvvf调频调压调速装置,按人体生理要求由电梯优化产生最佳的运行曲线,使电梯的起动加速减速停止过程处处体现安全舒适平稳的卓越性能。根据用户要求可选装停电应急平稳装置,确保以外停电时,被困电梯内的乘客能及时获得解困。
It can automatically run in line with technical parameters , and at the same time show the operating curve and varieties of operating condition . this control system has friendly user interface , simple operating method of menu choice , and visualized method to establish technical data . it can warn and process all kinds of abnormal condition in the working procedure 该控制系统有友好的界面,便利的菜单选择式操作方式,直观的填表式的设定工艺参数和显示工艺曲线的的能力,自动运行时能显示出运行曲线和各种运行状态,并对各种异常情况进行报警及处理。
The lifting - line and lifting - surface design method , the harmonic analysis method based on the panel method , new section design ways , the effective operating curves are integrated into a whole design system of the unsteady propeller , the design system is effective and reliable by the design example , the model test and the application to the full scale ship 本文把升力线和升力面设计方法、基于面元法预报螺旋桨非定常性能的谐调分析方法,新剖面设计方法、有效运转曲线计算方法组合为一套完整的非均匀流场中螺旋桨设计计算系统,经实例设计和模型试验及实船的应用,该设计系统是可靠且有效的。
This paper present an ideal and calculation method of the effective operating curve where cavitations characteristic is not change . based on the lifting - line and lifting - surface method , using effective operating curve to control the cavitation type and " new section " design method to extend the width of cavitation bucket . the width will almost increase 30 % than the common section 提出了保持剖面空泡特征不变的有效运转曲线的思想和确定方法,在升力线和升力面的基础上,应用有效运转曲线控制空泡类型,采用“新剖面”设计方法扩大空泡斗宽度,其空泡斗宽度比常规剖面增加近30左右。