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液氢在绝热管路中流动,由于周围介质的传热和克服流动阻力等因素的作用,会不可避免地被加热。当管路中液体的压力等于或低于所在温度下的饱和蒸汽压,液氢就要汽化而形成两相流。在大气压饱和状态下,液氢汽化后的体积约增大53倍。因此,少量液氢汽化就会形成含有大量气体的两相流。两相流使管路的实际过流面积减小并导致输送能力下降。此外,
Hydrogen in the adiabatic pipeline flow, due to the surrounding medium heat and overcome the flow resistance and other factors, will inevitably be heated. When the pressure of the liquid in the pipeline is equal to or lower than the saturated vapor pressure at the temperature, the liquid hydrogen is vaporized to form a two-phase flow. At atmospheric pressure saturated state, the liquid hydrogen vaporization volume increased about 53 times. Therefore, a small amount of liquid hydrogen vaporization will form a two-phase flow containing a large amount of gas. The two-phase flow reduces the actual over-flow area of the pipe and results in a drop in delivery capacity. In addition,