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本文分析了圆管中宾汉浆体和伪塑性浆体与气体混合物的轴对称层流。结果表明,由于掺入气体改善了浆体的流动性,浆体的流速和流量增加,而压力损失减小。该减阻效果随着宾汉屈服准数增大(或伪塑性幂指数减小)而更显著。同时由于掺气减少了静压差,管道上升坡度促使掺气浆体的总压降进一步减小,而当下降坡度超过某限度时,掺气反而使总压降增大。
In this paper, the axial symmetrical laminar flow of Bingham slurry and pseudo-plastic slurry and gas mixture in a round tube is analyzed. The results show that the flow rate and flow rate of the slurry increase and the pressure loss decreases due to the improved flowability of the slurry due to the incorporation of gas. The drag reduction effect is more significant as the Bingham yield quasi-number increases (or the pseudoplasticity power exponent decreases). At the same time, the static pressure difference is reduced due to the aeration, and the total pressure drop of the aerated slurry is further reduced by the rising gradient of the pipeline. When the descending gradient exceeds a certain limit, the total pressure drop increases.