Abstract:The sealed gas of the dry gas seal is generally considered as an ideal-gas when the dry gas seal is investigated and designed. However, some gases performance may be quite different from the ideal-gas at the high pressure. Some familiar gases, such as air, carbon dioxide(CO2), hydrogen(H2)and nitrogen(N2)were studied. As to the widely used spiral groove dry gas seal, the three-dimensional numerical simulations were performed by a CFD software. The effect of real gas on the performance of the spiral groove dry gas seal, such as the opening force and the leakage, has been investigated, and the fact that the gas film temperature varies along the seal face when the gas flows through the seal faces is considered at the same time. The results show that in the range of pressure no more than 4.6 MPa, the sealing performance of air and N2 real gas is basically the same as that of ideal-gas. The opening force and the leakage of CO2 real gas in spiral groove dry gas seal are greater than those of ideal-gas, while the opening force and the leakage of H2 real gas are slightly less than those of ideal-gas. The real gas behaviour has obvious effects on the leakage of the dry gas seal, but little effects on the opening force.
宋鹏云, 产文, 毛文元, 焦凤. 实际气体效应对螺旋槽干气密封性能影响的数值分析[J]. 排灌机械工程学报, 2015, 33(10): 874-881.
Song Pengyun, Chan Wen, Mao Wenyuan, Jiao Feng. Numerical analysis on effect of real gas on spiral groove dry gas seal performance. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(10): 874-881.
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