基于數(shù)值模擬和風(fēng)洞試驗(yàn)的分流對(duì)沖式集沙儀結(jié)構(gòu)優(yōu)化設(shè)計(jì)
發(fā)布時(shí)間：2019-08-02 13:04
【摘要】：集沙儀是研究土壤風(fēng)蝕必不可少的儀器之一,為提高集沙效率和自動(dòng)采集數(shù)據(jù)的準(zhǔn)確性,需要不斷地對(duì)集沙儀進(jìn)行優(yōu)化設(shè)計(jì)。該文以FLUENT軟件和微型風(fēng)洞為試驗(yàn)平臺(tái),對(duì)分流對(duì)沖式集沙儀風(fēng)沙分離器的排氣管直徑、排氣管長(zhǎng)度、排沙口直徑、排沙口收縮高度進(jìn)行了優(yōu)化設(shè)計(jì)。數(shù)值模擬和風(fēng)洞試驗(yàn)的結(jié)果顯示:改進(jìn)型風(fēng)沙分離器排氣口和排沙口的降速性能與原風(fēng)沙分離器相比有了明顯的提高,強(qiáng)風(fēng)條件(13.8 m/s)下,排氣管直徑、長(zhǎng)度均為25 mm,排沙口直徑、收縮高度分別為75、15 mm時(shí),氣流對(duì)集沙儀自動(dòng)采集傳感器的沖擊力最小,排氣口最高風(fēng)速比原風(fēng)沙分離器降低了7.47%,排沙口最高風(fēng)速比原風(fēng)沙分離器降低了35.59%,改進(jìn)后的集沙儀集沙效率比原集沙儀提高了1.56%。
[Abstract]:Sand collector is one of the indispensable instruments to study soil wind erosion. In order to improve the efficiency of sand collector and the accuracy of automatic data collection, it is necessary to optimize the design of sand collector. Based on FLUENT software and micro wind tunnel as the test platform, the diameter of exhaust pipe, the length of exhaust pipe, the diameter of sand outlet and the shrinkage height of sand outlet are optimized in this paper. The results of numerical simulation and wind tunnel test show that the speed reduction performance of the improved air and sand separator is obviously higher than that of the original wind sand separator. Under the strong wind condition (13.8 m / s), the diameter and length of the exhaust pipe are 25 mm, sand outlet diameter, and the shrinkage height is 75, respectively. At 15 mm, the impact force of air flow on the automatic acquisition sensor of sand collector is the smallest. The maximum wind speed at the outlet is 7.47% lower than that of the original sand separator, and the maximum wind speed at the outlet is 35.59% lower than that of the original sand separator. The sediment collecting efficiency of the improved sand collector is 1.56% higher than that of the original sand collector.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)機(jī)電工程學(xué)院;泰山學(xué)院機(jī)械與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目“分流對(duì)沖式集沙儀結(jié)構(gòu)參數(shù)及其內(nèi)流場(chǎng)特性研究”(41661058);國(guó)家自然科學(xué)基金資助項(xiàng)目“基于無(wú)線傳感網(wǎng)絡(luò)的土壤風(fēng)蝕監(jiān)測(cè)系統(tǒng)及其關(guān)鍵技術(shù)研究”(41361058)
【分類號(hào)】：S157;S237
，
本文編號(hào)：2522133
[Abstract]:Sand collector is one of the indispensable instruments to study soil wind erosion. In order to improve the efficiency of sand collector and the accuracy of automatic data collection, it is necessary to optimize the design of sand collector. Based on FLUENT software and micro wind tunnel as the test platform, the diameter of exhaust pipe, the length of exhaust pipe, the diameter of sand outlet and the shrinkage height of sand outlet are optimized in this paper. The results of numerical simulation and wind tunnel test show that the speed reduction performance of the improved air and sand separator is obviously higher than that of the original wind sand separator. Under the strong wind condition (13.8 m / s), the diameter and length of the exhaust pipe are 25 mm, sand outlet diameter, and the shrinkage height is 75, respectively. At 15 mm, the impact force of air flow on the automatic acquisition sensor of sand collector is the smallest. The maximum wind speed at the outlet is 7.47% lower than that of the original sand separator, and the maximum wind speed at the outlet is 35.59% lower than that of the original sand separator. The sediment collecting efficiency of the improved sand collector is 1.56% higher than that of the original sand collector.
【作者單位】： 內(nèi)蒙古農(nóng)業(yè)大學(xué)機(jī)電工程學(xué)院;泰山學(xué)院機(jī)械與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目“分流對(duì)沖式集沙儀結(jié)構(gòu)參數(shù)及其內(nèi)流場(chǎng)特性研究”(41661058);國(guó)家自然科學(xué)基金資助項(xiàng)目“基于無(wú)線傳感網(wǎng)絡(luò)的土壤風(fēng)蝕監(jiān)測(cè)系統(tǒng)及其關(guān)鍵技術(shù)研究”(41361058)
【分類號(hào)】：S157;S237
，
本文編號(hào)：2522133
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