旋风分离式集沙仪性能试验研究

集沙仪是用于采集土壤风蚀过程中的风蚀物来测定风沙流结构的仪器。旋风分离式集沙仪在0FDY-1.2型移动式风蚀风洞内的等动力性试验和单个分离器沙尘采集试验表明:该集沙仪满足等动力性要求,单个分离器对0.3～0.076mm的土样进行收集,不同风速下其收集效率均在96.24%,土样粒径d<0.076mm时的平均收集率为92.44%。旋风分离式集沙仪可用于保护性耕作抗风蚀效果的测试,为其有效实施提供科学依据。

Experimental Study on the Performance of the Whirling Separation Sand Sampler

Sand sampler is used to collect the aeolian sediment in the soil aeolian erosion and to measure the structure of the sand flow.The equal-ability experiments done with the 0FDY-1.2 type movable wind tunnel and the sand collection experiments of the single separator show that the whirling separation sand sampler meets the requirement of equal-ability.Using single separator to collect the sand grains with diameter 0.3~0.076 mm,the sand collection rates are all about 96.24% in different wind velocities.When the diameter of sand grains is less than 0.076mm,the average sand collection rate is 92.44%.The whirling separation sand sampler can be used for anti-erosion effect measurement in the conservation tillage and provide the scientific basis for it.