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为了研究供油压力和滑油温度对喷嘴射流扩散角和射流流量的影响,采用基于FLUENT软件的大涡数值模拟方法对喷嘴三维射流流场进行了两相流仿真和单相流仿真,分别通过高速可视化和喷射滑油称重的方法测量了喷嘴射流扩散角和射流流量,并用测量结果对两相流仿真和单相流仿真进行了合理性验证.当供油压力和滑油温度作为多因素单变量分别在0.1~1.0MPa,50~110℃范围内增加时,射流扩散角在沿喷孔轴线距喷孔出口100mm范围内近似为零,并且射流流量非线性增加.结果表明:在喷嘴实际使用工况范围内,供油压力和滑油温度的变化对射流扩散角的影响很小;供油压力和滑油温度的交互作用对射流流量的影响较大;射流流量等值线上存在使供油压力和滑油温度的波动对射流流量的影响最小的供油压力和滑油温度组合.
In order to study the effect of oil supply pressure and oil temperature on nozzle jet divergence angle and jet flow, a large-eddy numerical simulation method based on FLUENT software was used to simulate the three-phase jet flow field of nozzle. Speed visualization and jetting oil weighing method were used to measure the nozzle jet divergence angle and jet flow rate.The results of two-phase flow simulation and single-phase flow simulation were verified rationally.When the oil supply pressure and oil temperature were taken as a multi-factor When the univariate increases in the range of 0.1 ~ 1.0MPa and 50 ~ 110 ℃ respectively, the jet divergence angle is approximately zero within 100mm along the jet axis from the exit of the jet orifice, and the jet flow rate increases nonlinearly.The results show that when the nozzle actual The change of oil supply pressure and oil temperature has little effect on the jet diffusion angle under the working conditions. The interaction between oil supply pressure and oil temperature has a great influence on the jet flow. Supply pressure and oil temperature fluctuations on the jet flow Minimum oil supply pressure and oil temperature combination.