基于数值模拟和风洞试验的分流对冲式集沙仪结构优化设计
发布时间：2019-08-02 13:04
【摘要】：集沙仪是研究土壤风蚀必不可少的仪器之一,为提高集沙效率和自动采集数据的准确性,需要不断地对集沙仪进行优化设计。该文以FLUENT软件和微型风洞为试验平台,对分流对冲式集沙仪风沙分离器的排气管直径、排气管长度、排沙口直径、排沙口收缩高度进行了优化设计。数值模拟和风洞试验的结果显示:改进型风沙分离器排气口和排沙口的降速性能与原风沙分离器相比有了明显的提高,强风条件(13.8 m/s)下,排气管直径、长度均为25 mm,排沙口直径、收缩高度分别为75、15 mm时,气流对集沙仪自动采集传感器的冲击力最小,排气口最高风速比原风沙分离器降低了7.47%,排沙口最高风速比原风沙分离器降低了35.59%,改进后的集沙仪集沙效率比原集沙仪提高了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.
【作者单位】： 内蒙古农业大学机电工程学院;泰山学院机械与建筑工程学院;
【基金】：国家自然科学基金资助项目“分流对冲式集沙仪结构参数及其内流场特性研究”(41661058);国家自然科学基金资助项目“基于无线传感网络的土壤风蚀监测系统及其关键技术研究”(41361058)
【分类号】：S157;S237
，
本文编号：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.
【作者单位】： 内蒙古农业大学机电工程学院;泰山学院机械与建筑工程学院;
【基金】：国家自然科学基金资助项目“分流对冲式集沙仪结构参数及其内流场特性研究”(41661058);国家自然科学基金资助项目“基于无线传感网络的土壤风蚀监测系统及其关键技术研究”(41361058)
【分类号】：S157;S237
，
本文编号：2522133
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