cavitations 中文意思是什麼
cavitations
解釋
孔蝕現象；穴蝕現象-
Cavitations of water pump and its installation level
離心式水泵的汽蝕與安裝高度 -
But the general used ski - jump energy dissipation scheme often causes a series of insurmountable difficulties, such as fogging, cavitations demolition, and bank scouring
而常規的挑流消能方案，又常出現象霧化、空蝕破壞、岸坡沖刷等較難以克服的問題。 -
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中螺旋槳槳葉剖面的設計方法，提出了保持剖面空泡特徵不變的等效運轉曲線的思想，並創建了等效運轉曲線的確定方法。 -
Cavitations in foreign hydraulic turbines appear in clear water condition, so its destructive extent is not far more serious than in yellow river in our country. stronger stiffness and more agility are required for special - purpose robot for hydraulic turbine repair used in our country, especially robot for polishing after weld. foreign robot for hydraulic turbine repair could not satisfy our working require, so we develop special - purpose robot system that is used to polish and weld repair cavitated flow path surfaces of hydraulic turbines on all locations
國外水電站的水輪機汽蝕是在清水條件下產生的，其破壞程度遠不及我國黃河等水域嚴重，用於我國水輪機修復工作的專用機器人，特別是補焊后承擔打磨的機器人，要求有更強的剛度和更大的靈活性，國外水輪機修復機器人滿足不了我國水輪機修復工作要求，因此我們開發了用於在機坑內對水輪機空蝕磨損破壞表面進行修復的「水輪機修復專用機器人」 。 -
In order to increase the energy dissipation of stepped spillway at iarge unit discharge, the integhty dissipater of aerated splitter pier and steppe characteristics is studied. because of verticaj diffhaion now by aerated splitter and impachng steppe 3 by drop flow, the air concentration and the energy dissipation efficiency are greatly increased ; the potentiality of cavitations is decrease. in special at large unit discharge, this effect is more obvious
摻氣分流墩的增加，明顯地改善了階梯面上的壓強分佈，消除或減小了階梯凹角內和立面上部的負壓；由於摻氣分流墩使水流縱向擴散以及挑流落下后在階梯上的撞擊，使水流的摻氣濃度和消能率都得到較大的提高，降低了階梯面空蝕的可能性，特別是在大單寬流量時，這種效果更為明顯。 -
The numerical simulation and experimental research made on the characteristics of the clearance cavitations in kaplan turbine are described herein ; in which the analysis mainly is concentrated on the characteristics of leakage - vortex caused by the flow of the clearance between blade tip and blade chamber, that occurs at the front - pressure side of the blade, and the intensity of the secondary - flow - vortex ; furthermore, the relationship in between the leakage - vortex, secondary flow vortex, cavitations and erosion are analyzed as well
摘要對軸流轉槳式水輪機輪緣間隙流動及空化特性進行數值模擬和試驗研究，重點分析輪緣間隙流動在正面頭部泄漏流動所引起的泄漏渦帶、二次流動的漩渦強度和空化特性，以及泄漏渦帶旋轉、二次流動的漩渦與空蝕和磨損之間的關系。 -
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徵不變的有效運轉曲線的思想和確定方法，在升力線和升力面的基礎上，應用有效運轉曲線控制空泡類型，採用「新剖面」設計方法擴大空泡斗寬度，其空泡斗寬度比常規剖面增加近30左右。 -
Based on the comparison made among the characteristics of different kinds of the blade materials, the relationship between the material characters and the flow attack angle is explained, and then the breakage mechanism of the combined effects from both the clearance - cavitations and the erosion of leakage flow are expounded comprehensively
通過對不同材料的特性比較，解釋了材料特性與沖角之間的關系，綜合闡述了泄漏流動所引起葉片正面頭部空蝕與磨損聯合作用產生破壞的機理。
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