Blade section designed based on equivalent operating curve can effectively control the cavitaion area and type , and the desired cavitation performance can obtained 基于等效運(yùn)轉(zhuǎn)曲線設(shè)計(jì)的槳葉剖面能有效地控制空泡范圍和空泡類型,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 摘要給出了非均勻流場(chǎng)中螺旋槳槳葉剖面的設(shè)計(jì)方法,提出了保持剖面空泡特征不變的等效運(yùn)轉(zhuǎn)曲線的思想,并創(chuàng)建了等效運(yùn)轉(zhuǎn)曲線的確定方法。
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系列病床電梯以人性化的設(shè)計(jì),超平穩(wěn)的運(yùn)行,給予病患者最大程度的安靜舒適增添溫馨的色彩。采用先進(jìn)vvvf調(diào)頻調(diào)壓調(diào)速裝置,按人體生理要求由電梯優(yōu)化產(chǎn)生最佳的運(yùn)行曲線,使電梯的起動(dòng)加速減速停止過程處處體現(xiàn)安全舒適平穩(wěn)的卓越性能。根據(jù)用戶要求可選裝停電應(yīng)急平穩(wěn)裝置,確保以外停電時(shí),被困電梯內(nèi)的乘客能及時(shí)獲得解困。
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 該控制系統(tǒng)有友好的界面,便利的菜單選擇式操作方式,直觀的填表式的設(shè)定工藝參數(shù)和顯示工藝曲線的的能力,自動(dòng)運(yùn)行時(shí)能顯示出運(yùn)行曲線和各種運(yùn)行狀態(tài),并對(duì)各種異常情況進(jìn)行報(bào)警及處理。
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 本文把升力線和升力面設(shè)計(jì)方法、基于面元法預(yù)報(bào)螺旋槳非定常性能的諧調(diào)分析方法,新剖面設(shè)計(jì)方法、有效運(yùn)轉(zhuǎn)曲線計(jì)算方法組合為一套完整的非均勻流場(chǎng)中螺旋槳設(shè)計(jì)計(jì)算系統(tǒng),經(jīng)實(shí)例設(shè)計(jì)和模型試驗(yàn)及實(shí)船的應(yīng)用,該設(shè)計(jì)系統(tǒng)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變的有效運(yùn)轉(zhuǎn)曲線的思想和確定方法,在升力線和升力面的基礎(chǔ)上,應(yīng)用有效運(yùn)轉(zhuǎn)曲線控制空泡類型,采用“新剖面”設(shè)計(jì)方法擴(kuò)大空泡斗寬度,其空泡斗寬度比常規(guī)剖面增加近30左右。