【摘要】 为了研究润滑油黏度随含气率变化的特性,以汽轮机油和氮气作为试验材料制备气油两相流,分别采用称质量法和旋转黏度计测量不同通气流量下两相流的含气率和黏度,并对试验数据进行了回归分析,建立了两相流的黏度计算模型。试验结果表明:油温在30℃条件下,气油两相流的含气率随着通气流量的增大而增大,试验测量所得含气率最大值为2. 557%。气油两相流的黏度随着含气率的增加而增加。更多还原

【Abstract】 Turbine oil and Nitrogen gas were mixed to produce a gas-oil two-phase flow to study the effect on viscosity of the lubricating oil of the variation of the gas void fraction under different ventilation flow. The gas void fraction and dynamic viscosity of the two-phase flow were measured separately by means of weight variation and rotational viscometer. A numerical model was built to approximate the viscosity of the two-phase flow by regression analysis of experimental data. The results indicate that gas void fraction increases with the increasing flow rate of the gas at 30 ℃ of oil temperature. The maximum gas void fractions measured is 2. 557%. The viscosity of the two-phase flow increases with the increasing of gas void fraction.更多还原