CAJ | 학술논문

通过建立1000MW及1400MW汽轮发电机径向轴承的轴瓦-润滑油-轴径的流固热耦合系统，应用流固热三场耦合技术(TFSI)方法求解该耦合系统的连续性方程、能量方程和 Navier-Stokes 方程组，得到耦合系统的温度场、压力场等参数。比较了CFD-TFSI方法与Reynold方程计算结果。结果表明：CFD-TFSI方法和Reynold方程计算结果基本相同。CFD-TFSI方法直接求解N-S方程，可以更准确地反应轴承动特性。轴承上油沟改变了空穴产生的位置和程度；下油沟降低了油膜温度，改变了温度分布，增加了油膜稳定性。
통과건립1000MW급1400MW기륜발전궤경향축승적축와-윤활유-축경적류고열우합계통，응용류고열삼장우합기술(TFSI)방법구해해우합계통적련속성방정、능량방정화 Navier-Stokes 방정조，득도우합계통적온도장、압력장등삼수。비교료CFD-TFSI방법여Reynold방정계산결과。결과표명：CFD-TFSI방법화Reynold방정계산결과기본상동。CFD-TFSI방법직접구해N-S방정，가이경준학지반응축승동특성。축승상유구개변료공혈산생적위치화정도；하유구강저료유막온도，개변료온도분포，증가료유막은정성。
A fluid/solid coupled heat transfer system for 1000MW and 1400MW turbo generator journal bearing was built, including bearing bush, lubricating oil and journal the mass conservation equation ,energy equation and navier-stokes equations of the coupled system were solved by cfd-tfsi method ,the temperature field and pressure field were obtained. CFD-TFSI method and Reynold method were compared, the result turned to be almost the same. CFD-TFI method can solve N-S equation directly and can display the dynamic characteristics of bearing more accurately. Grooving in upper pad can change the position and extent of cavitation;lower pad of bearing has decreased the temperature obviously, changing the distribution of the temperature and enhancing the stability of bearings.