本文關(guān)鍵詞：海洋污損對(duì)螺旋槳葉切面性能影響的數(shù)值模擬　出處：《中國(guó)艦船研究》2016年03期 　論文類型：期刊論文

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【摘要】：通常情況下,艦艇螺旋槳槳葉表面為拋光金屬材質(zhì),沒(méi)有涂裝防污涂層,使得槳葉易受到海洋污損生物的附著和侵蝕,然而污損對(duì)螺旋槳性能的影響研究較少。采用CFD方法對(duì)污損螺旋槳葉切面流場(chǎng)分布進(jìn)行數(shù)值模擬,在污損生物群落中選取藤壺作為污損對(duì)象,并在幾何層面上進(jìn)行直接建模。計(jì)算結(jié)果表明,污損使得葉切面邊界層分離更早、分離區(qū)域更大,進(jìn)而使得葉切面升阻比顯著降低(最大降低了近90%),從而導(dǎo)致螺旋槳推進(jìn)效率大幅降低;當(dāng)藤壺高度超過(guò)一定閾值后,藤壺的繼續(xù)生長(zhǎng)對(duì)葉切面升阻力的影響變得較小。
[Abstract]:Usually, the surface of ship propeller blade is a polished metal material, without antifouling coating, which makes the propeller blade vulnerable to the adhesion and erosion of marine fouling organisms. However, the influence of fouling on propeller performance is less studied. The CFD method is used to simulate the flow field of the impeller blade, and the barnacles are selected as the fouling object in the fouling biota. The results show that the blade blade boundary layer is separated earlier and the separation area is larger, and the rise-to-drag ratio of the blade surface is significantly reduced (the maximum reduction is nearly 90%). As a result, the propeller propulsion efficiency is greatly reduced. When the barnacle height exceeds a certain threshold, the effect of the continued growth of barnacles on the resistance of leaf cut surface becomes smaller.
【作者單位】： 海軍工程大學(xué)艦船工程系;
【基金】：海軍工程大學(xué)自然科學(xué)基金資助項(xiàng)目(HGDQNJJ13038)
【分類號(hào)】：U664.33
【正文快照】： 0引言在海洋水生環(huán)境中附著和生長(zhǎng)于物體表面的微生物、植物和動(dòng)物稱之為海洋污損(簡(jiǎn)稱污損)[1]。當(dāng)一艘艦艇下水后污損便開始在艦艇上附著生長(zhǎng),在艦艇進(jìn)行清洗和重新涂裝之前污損將持續(xù)地生長(zhǎng)積累。艦艇的污損程度取決于艦艇在海上的時(shí)間、航行水域的溫度和鹽度以及防污漆的，

本文編號(hào)：1379971