Authors

Abstract

This paper introduces a cyclone separation sand sampler with diversion flow to enhance soil wind erosion monitoring accuracy. Using CFD simulations and orthogonal testing, the optimal structural parameters for improved sampling efficiency were determined. A response model showed strong predictive capability with a P-value less than 0.0001 and R² of 0.9482. Wind tunnel tests demonstrated that the new sampler achieved a 91.44% efficiency, surpassing the 90.81% of the traditional design. The research provides valuable data for more accurate wind-sand flow monitoring, aiding in desertification prevention and improving wind erosion assessments in grasslands.

Abstract in Chinese

集沙仪是进行土壤风蚀监测的主要设备，其分离效率是衡量设备精度的重要参数。基于引流的方法可以提高集沙仪气固分离颗粒的分离效率、减小“二次流”的影响，为实现集沙仪的高精度风蚀监测，本文设计出一款引流式旋风分离集沙仪。通过CFD模拟仿真对集沙单元的结构进行计算，运用正交试验获得集沙单元对应结构的最优尺寸参数，建立分离效率与试验因素之间的响应模型，分析变量间的相互影响。结果表明：二次方程模型的P小于0.0001、F值为12.36、R2值为0.9482，模型拟合近似度较理想，能够较准确的预测集沙单元的分离效率情况。经风洞试验验证，引流式旋风分离集沙仪的平均集沙率为91.44%，高于传统式旋风分离集沙仪的平均集沙率90.81%。数据表明，该研究结果有助于获取更加准确的风沙流数据，为防止土地荒漠化与改善草原的风蚀现状提供了技术参考。