【摘要】：集沙儀是研究土壤風蝕必不可少的儀器之一,為提高集沙效率和自動采集數(shù)據(jù)的準確性,需要不斷地對集沙儀進行優(yōu)化設(shè)計。該文以FLUENT軟件和微型風洞為試驗平臺,對分流對沖式集沙儀風沙分離器的排氣管直徑、排氣管長度、排沙口直徑、排沙口收縮高度進行了優(yōu)化設(shè)計。數(shù)值模擬和風洞試驗的結(jié)果顯示:改進型風沙分離器排氣口和排沙口的降速性能與原風沙分離器相比有了明顯的提高,強風條件(13.8 m/s)下,排氣管直徑、長度均為25 mm,排沙口直徑、收縮高度分別為75、15 mm時,氣流對集沙儀自動采集傳感器的沖擊力最小,排氣口最高風速比原風沙分離器降低了7.47%,排沙口最高風速比原風沙分離器降低了35.59%,改進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)大學機電工程學院;泰山學院機械與建筑工程學院;
【基金】：國家自然科學基金資助項目“分流對沖式集沙儀結(jié)構(gòu)參數(shù)及其內(nèi)流場特性研究”(41661058);國家自然科學基金資助項目“基于無線傳感網(wǎng)絡的土壤風蝕監(jiān)測系統(tǒng)及其關(guān)鍵技術(shù)研究”(41361058)
【分類號】：S157;S237
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本文編號：2522133