螺槳表面 的英文怎麼說
中文拼音 [luójiǎngbiǎomiàn]
螺槳表面
英文
propeller surface- 螺 : 1. [動物學] (軟體動物) spiral shell; snail; conch 2. (螺旋形的指紋) whorl (in fingerprint)
- 槳 : 名詞1. (劃船用具) oar; paddle 2. (螺旋槳) propeller
- 表 : Ⅰ名詞1 (外面;外表) outside; surface; external 2 (中表親戚) the relationship between the child...
- 面 : Ⅰ名詞1 (頭的前部; 臉) face 2 (物體的表面) surface; top 3 (外露的一層或正面) outside; the ri...
- 螺槳 : screw propeller
- 表面 : surface; superficies; boundary; face; rind; sheet; skin; outside; appearance
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The surface of propeller, hub and the vortex of blade is discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution
槳葉、槳轂表面和螺旋槳尾渦面採用四邊形雙曲面元離散,以消除面元間的間隙。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
兩種理論預報的滬東型( hd )螺旋槳和mau圖譜槳的葉切面壓力分佈比較,結果表明,滬東型( hd )螺旋槳葉切面的壓力分佈較mau圖譜槳均勻。Comparisons made among the calculated data of above two methods for open - water performance of the hd propeller and the test results shown that surface panel method is in good agreement with test results
兩種理論預報的滬東型( hd )螺旋槳敞水性能結果與試驗值比較表明:面元法計算結果與試驗值的吻合良好。When the propeller operates in the spatially non - uniform velocity field behind the ship, the unsteady cavitation on the blades often causes the vibration of ship structure, the propeller noise and the cavitation erosion on the blade
在船尾非均勻流場中工作的螺旋槳,常常由於槳葉上產生了非定常空泡,導致船尾振動和螺旋槳噪聲,致使槳葉表面出現空泡剝蝕。Presently most of the theoretical method to predict the propeller - induced hull pressure fluctuation is based on the calculation method in which the pressure is induced by pulsating source in infinite flow. the calculation method is adopted and the corresponded computer program is complied. the propeller - induced hull pressure fluctuation due to blade thickness, blade load, cavity thickness and the change of the cavity volume can be analyzed respectively in the computer program
目前,螺旋槳誘導的船體表面脈動壓力的理論預報方法,大多是以無限流場中點脈動源誘導的周圍流場的脈動壓力的計算方法為基礎的,本文採用該方法編制了計算程序,可以分別考慮槳葉厚度、槳葉負荷、槳葉上空泡厚度及其體積變化在船體表面指定位置上產生的脈動壓力。The prediction of propeller - induced hull pressure fluctuation in non - uniform flow is studied by using theoretical calculation and model experiment systematically. an intact method and computer program for the prediction of unsteady cavitating propeller - induced hull pressure fluctuation in non - uniform flow is set up in this paper. the measurement of propeller induced hull pressure fluctuation in depressurized towing tank carried out in this paper is the first time inland
本文從理論計算和模型試驗兩個方面系統地研究了不均勻流場中螺旋槳空泡誘導的船體表面脈動壓力的預報問題,建立了一套完整的預報非定常空泡螺旋槳誘導的船體表面脈動壓力的方法和程序,並在國內首次完成了在減壓拖曳水池中進行空泡螺旋槳誘導的船體表面脈動壓力測試。The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller. the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution. for highly skewed propeller, the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface, which result easily in incorrect calculation results of velovity on blade surface, even in iteration divergence and calculation failure. a “ non - conventional grid ” is developed to acoid these problems. this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller. the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure. by sample calculating, the obtained results are satisfied the experimental data
採用面元法預報大側斜螺旋槳水動力性能,螺旋槳表面及尾渦面離散為四邊形雙曲面元,每個面元上布置等強度源匯和偶極子分佈.對于大側斜螺旋槳而言,槳葉表面採用常規的等半徑網格劃分方法在近葉梢處將導致大展弦比、大側斜和扭曲面元,這容易使槳葉表面速度的計算結果不正確,甚至會導致迭代過程發散及計算失敗.文中建立了一種「非常規網格」劃分方法,能有效地解決大側斜螺旋槳的計算和收斂問題.槳葉隨邊處通過迭代實現非線性等壓庫塔條件The computer program has following advantage : the solution of main blade is by iterative scheme in time domain, the kutta condition is used by explicit equal pressure condition, the jacobian matrix which can reflect the influence on the difference between the upper and lower surface at trailing edge by dipole is calculated in each iterative procedure, in order to improve the convergence of iteration
本文編制的螺旋槳非定常性能預報程序是針對主葉在時域中迭代求解的, kutta條件採用的是顯式的等壓條件,求解中為了提高迭代的收斂性,在每次迭代中都重新計算反映偶極子強度對尾緣處上下表面壓力差影響的jacobi矩陣。Through the verification calculations on various types of propeller, the numerical method and computer program presented in this paper can give a satisfied result of open water performance of propeller, unsteady forces, pressure distribution of blade surface
通過對各種類型螺旋槳的校核計算,表明本文提出的計算程序在螺旋槳敞水性能、非定常力、槳葉表面壓力分佈等方面均能取得令人滿意的計算結果。The two - phase flow on blade surface by means of charging air is one of technical manners to improve the cavitation performance for marine propellers
在槳葉表面充氣,以氣液二相流代替單相流動,實現擴大空泡斗,是當前船舶螺旋槳減振降噪措施之一。In this thesis we have get the profile of the shroud, the shroud is simulated by circle source and sink series, and the propeller is simulated by a actuating disk
在計算螺旋槳與函道的相互影響時,只考慮螺旋槳在函道表面任一點上誘導速度的平均值,即軸對稱。This dissertation use a high - order surface panel method based on b - spline for predicting the hydrodynamic performance of the propeller in steady flow. the b - splme is applied not only to representation of the propeller ' s geometry, but also to represent the doublet strength distribution on the surface of the propeller, which makes the geometry representation and the doublet strength distribution of the propeller more precise
本文採用了一種基於b樣條的高階面元法預報螺旋槳的定常水動力性能,不但用b樣條表達螺旋槳表面的幾何形狀,而且還用其表示螺旋槳表面的偶極子分佈, b樣條的應用提高了螺旋槳的幾何以及偶極子密度表達的精度。分享友人