本文選題：波浪破碎 + 壁面剪應(yīng)力傳感器��； 參考：《實(shí)驗(yàn)流體力學(xué)》2017年03期

【摘要】：破波區(qū)床面剪應(yīng)力的正確認(rèn)知對(duì)于揭示海岸泥沙輸運(yùn)以及地貌演變的機(jī)理具有重要意義。波浪破碎以后帶來(lái)的紊動(dòng)和渦旋會(huì)對(duì)床面剪應(yīng)力產(chǎn)生顯著的影響。采用MEMS柔性熱膜式壁面剪應(yīng)力傳感器在波浪水槽中開(kāi)展了破碎波作用下的床面剪應(yīng)力測(cè)量應(yīng)用測(cè)試。實(shí)驗(yàn)結(jié)果表明該壁面剪應(yīng)力傳感器可以應(yīng)用于破碎波作用下的床面剪應(yīng)力測(cè)量。在破波點(diǎn)之前可以根據(jù)近底流速輔助該傳感器判斷床面剪應(yīng)力的方向。床面剪應(yīng)力在波浪破碎之前變化較為平緩,在波浪破碎之后床面剪應(yīng)力的波動(dòng)和極值都會(huì)增大。斜坡上沿程最大床面剪應(yīng)力均值的極值出現(xiàn)于卷破水舌入射點(diǎn)之后。
[Abstract]:The correct understanding of the shear stress on the bed surface in the broken wave area is of great significance for revealing the mechanism of coastal sediment transport and geomorphologic evolution. The turbulence and vortex after wave breaking will have a significant effect on the shear stress of bed surface. The MEMS flexible hot-film wall shear stress sensor was used to measure the shear stress of bed surface in a wave flume. The experimental results show that the wall shear stress sensor can be applied to the measurement of bed shear stress under the action of broken wave. The direction of bed shear stress can be determined by the near bottom velocity before breaking point. The variation of bed shear stress is relatively gentle before wave breaking, and the fluctuation and extreme value of bed shear stress will increase after wave breaking. The extreme value of the mean value of the maximum bed shear stress along the slope appears behind the incident point of the cracked tongue.
【作者單位】： 南京水利科學(xué)研究院;河海大學(xué)港口海岸與近海工程學(xué)院;水文水資源與水利工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;港口航道泥沙工程交通行業(yè)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重大科學(xué)儀器設(shè)備開(kāi)發(fā)專(zhuān)項(xiàng)項(xiàng)目(2013YQ040911) 國(guó)家自然科學(xué)基金項(xiàng)目(51309158)
【分類(lèi)號(hào)】：TV148
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本文編號(hào)：1957063