The relationship between mean inlet drop size and separation efficiency of reducing section,tapered section,parallel section and the whole hydrocyclone is discussed in this paper.The effect of operation parameters suc...The relationship between mean inlet drop size and separation efficiency of reducing section,tapered section,parallel section and the whole hydrocyclone is discussed in this paper.The effect of operation parameters such as feed flowrate, split ratio on mean oil drop size in the wall of each part in hydrocyclone is also investigated.The result suggests that separation efficiency of the reducing section,tapered section and the whole hydrocyclone increased with increasing inlet droplet size,whereas the separation efficiency of parallel section does not vary very much.When inlet flowrate is high enough,mean droplet sizes in the wall of hydrocyclone decreases with increasing feed flowrate.The split ratio has little influence on mean droplet sizes on the wall of hydrocyclone,and mean oil droplet diameters decreases along the axial direction under same operation condition.展开更多
为了验证试验得到的最佳喉管进出口直径之比λ的准确性,并进一步研究所对应模型的优越性与相关参数变化规律,采用软件Solidworks以及CFD对8种不同模型进行建模并计算,得出喉管压差与出口雷诺数、吸肥量、最小压力的变化规律,以及在相同...为了验证试验得到的最佳喉管进出口直径之比λ的准确性,并进一步研究所对应模型的优越性与相关参数变化规律,采用软件Solidworks以及CFD对8种不同模型进行建模并计算,得出喉管压差与出口雷诺数、吸肥量、最小压力的变化规律,以及在相同工况下,8种不同λ值对文丘里施肥器的流场特性影响.结果表明:计算得到的最佳λ值与试验得到的λ值误差为8.6%,进口流量与试验对比误差为10.0%左右;压差与出口雷诺数呈幂函数变化规律,与最小压力呈线性变化规律;计算得到了该系列施肥器产生负压的必要条件,当λ=1.27时,产生负压条件的压差为4.3 k Pa;提出当1.00≤λ<1.27时,初始压差随λ增大而减小,当1.27≤λ<1.68时,初始压差随λ增大而增大,增大趋势逐渐变大,当1.68≤λ<2.00时,初始压差随λ增大而减小;λ=1.27时比其他7种型号吸肥性能好,可靠性高,是ATP 3,4,5,6系列施肥器λ的最优值.展开更多
文摘The relationship between mean inlet drop size and separation efficiency of reducing section,tapered section,parallel section and the whole hydrocyclone is discussed in this paper.The effect of operation parameters such as feed flowrate, split ratio on mean oil drop size in the wall of each part in hydrocyclone is also investigated.The result suggests that separation efficiency of the reducing section,tapered section and the whole hydrocyclone increased with increasing inlet droplet size,whereas the separation efficiency of parallel section does not vary very much.When inlet flowrate is high enough,mean droplet sizes in the wall of hydrocyclone decreases with increasing feed flowrate.The split ratio has little influence on mean droplet sizes on the wall of hydrocyclone,and mean oil droplet diameters decreases along the axial direction under same operation condition.
文摘为了验证试验得到的最佳喉管进出口直径之比λ的准确性,并进一步研究所对应模型的优越性与相关参数变化规律,采用软件Solidworks以及CFD对8种不同模型进行建模并计算,得出喉管压差与出口雷诺数、吸肥量、最小压力的变化规律,以及在相同工况下,8种不同λ值对文丘里施肥器的流场特性影响.结果表明:计算得到的最佳λ值与试验得到的λ值误差为8.6%,进口流量与试验对比误差为10.0%左右;压差与出口雷诺数呈幂函数变化规律,与最小压力呈线性变化规律;计算得到了该系列施肥器产生负压的必要条件,当λ=1.27时,产生负压条件的压差为4.3 k Pa;提出当1.00≤λ<1.27时,初始压差随λ增大而减小,当1.27≤λ<1.68时,初始压差随λ增大而增大,增大趋势逐渐变大,当1.68≤λ<2.00时,初始压差随λ增大而减小;λ=1.27时比其他7种型号吸肥性能好,可靠性高,是ATP 3,4,5,6系列施肥器λ的最优值.
