Analysis of two-phase flow in cryogenic damper seals. Part I : Theoretical model
Analysis of two-phase flow in cryogenic damper seals. Part I : Theoretical model
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DOI：
10.1115/1.2834413
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发表时间：
1998-04
影响因子：
2.5
通讯作者：
G. Arauz;L. Andrés
中科院分区：
文献类型：
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作者：
G. Arauz;L. Andrés
低温流体阻尼器密封在接近液体-蒸汽区域（接近临界点或稍微过冷）操作时可能会形成两相流区域，这会影响密封性能和可靠性。全液体、液体-蒸气和全蒸气，即，提出了一种用于预测密封动态受迫响应的连续汽化整体流模型。连续性、动量和能量（焓）输运方程控制处于热力学平衡的均质饱和混合物的两相流。静态和动态的密封力的性能特性，从扰动分析的控制方程。理论预测和比较实验测量的液态和气态氮密封在第二部分。还讨论了两相流状态对氧气阻尼器密封的动态力系数和稳定性的影响。
Cryogenic fluid damper seals operating close to the liquid-vapor region (near the critical point or slightly sub-cooled) are likely to develop a two-phase flow region which affects the seal performance and reliability. An all-liquid, liquid-vapor, and all-vapor, i.e., a continuous vaporization bulk flow model is presented for prediction of the seal dynamic forced response. Continuity, momentum, and energy (enthalpy) transport equations govern the two-phase flow of a homogeneous saturated mixture in thermodynamic equilibrium. Static and dynamic force performance characteristics for the seal are obtained from a perturbation analysis of the governing equations. Theoretical predictions and comparisons to experimental measurements in a liquid and gaseous nitrogen seal are presented in Part II. The effects of two-phase flow regimes on the dynamic force coefficients and stability of an oxygen damper seal are also discussed.