纳米流体两相流磨削区压力场建模与实验

主要对纳米粒子射流微量润滑磨削砂轮与工件界面压力场进行理论建模与数值仿真。建立了纳米粒子射流微量润滑磨削区两相流压力场的数学模型，并进行了仿真。结果表明：磨削区动压力随着砂轮转速的增加，射流速度的增大而增大；随着最小间隙的增大急剧减小；3种喷嘴角度下，当喷嘴位置角度为15°时，磨削区沿砂轮进给方向的压力大于其他2种位置。在KP-36精密磨床以及纳米粒子射流供给装置构建的实验平台上，利用CY3018型压力传感器测试压力场变化规律，研究了砂轮转速、最小间隙、射流速度以及喷嘴角度对磨削区压力场的影响，实验测得的数据与仿真数据基本吻合，验证了理论研究的正确性。

Simulation and experimental investigation in pressure field of grinding zone with nanofluid

The modeling and numerical simulation was conducted on nano particle jet flow of MQL（minimal quantity lubrication） grinding pressure field at the wedge shaped zone between the grinding wheel and the workpiece surface. The results show that with the higher wheel speed, the pressure of the wedge shaped gap is larger. The pressure of the wedge shaped gap grows larger with a smaller wedge shaped gap. During the three nozzle positions, the pressure of the wedge shaped gap is greater than the other two positions when the angle is 15°. On the experimental platform constructed by the KP 36 precision grinder and nanoparticles jet supply device, using CY3018 type pressure sensor, the pressure field test system was established. The experimental data fits the simulation results well, which shows the correctness of the theoretical research.