本文選題：農(nóng)業(yè)退水 + 分流裝置　； 參考：《農(nóng)業(yè)機(jī)械學(xué)報(bào)》2017年06期

【摘要】：從理論可行性出發(fā),初步設(shè)計(jì)一種分流裝置,再?gòu)墓δ芎托实慕嵌葘?duì)其進(jìn)行改進(jìn),最后采用計(jì)算流體力學(xué)軟件Fluent對(duì)農(nóng)業(yè)退水分流過程進(jìn)行數(shù)值模擬,對(duì)比分析不同流速下的鹽度場(chǎng)和速度場(chǎng),結(jié)果表明該分流裝置可為最終設(shè)計(jì)提供參考。試驗(yàn)工況分3組進(jìn)行,設(shè)定入口流速作為唯一變量,3組試驗(yàn)均假定相同的入口鹽度分布函數(shù)。截取2個(gè)Y軸剖面的流速場(chǎng)云圖和4個(gè)X軸剖面的鹽度場(chǎng)云圖進(jìn)行對(duì)比分析。結(jié)果表明,分流裝置可以對(duì)不同鹽度的農(nóng)業(yè)退水進(jìn)行分流。上導(dǎo)流槽得到低鹽度農(nóng)業(yè)退水,下導(dǎo)流槽得到較高鹽度退水。分流的效率取決于裝置尺寸、分層流流速和鹽度分布等因素,可根據(jù)實(shí)際情況進(jìn)行調(diào)整和優(yōu)化。
[Abstract]:Based on the theoretical feasibility, a kind of diversion device was designed, and then improved from the angle of function and efficiency. Finally, the flow dynamics software fluent was used to simulate the process of agricultural water diversion. The salinity field and velocity field at different velocities are compared and analyzed. The results show that the distributor can provide reference for the final design. The test conditions were divided into three groups, and the inlet velocity was set as the only variable. The same inlet salinity distribution function was assumed in the three groups. The velocity field cloud maps of two Y-axis sections and the salinity-field cloud maps of four X-axis sections were taken for comparative analysis. The results show that the diverting unit can separate agricultural receding water with different salinity. The low salinity agricultural water was obtained in the upper channel and the higher salinity water was obtained in the lower channel. The efficiency of the distributary depends on the size of the unit, the velocity of the stratified flow and the distribution of salinity, and can be adjusted and optimized according to the actual situation.
【作者單位】： 浙江大學(xué)港口海岸與近海工程研究所;
【基金】：高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金項(xiàng)目(2120101110108) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2015XZZX002-01) 水體污染控制與治理科技重大專項(xiàng)(2009ZX07424-001)
【分類號(hào)】：S156.4
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本文編號(hào)：2032236