【摘要】 通过试验与理论相结合的方法,对输水管道系统气体特性与水流冲击截留气团进行了研究。研究表明,决定气团主要性质的气体多方指数n在输水管道系统发生水力过渡过程时存在较为显著的变化,并非单一常数,从而提出了相应的四过程:即压缩子过程1、膨胀子过程2、膨胀子过程3和压缩子过程4。在压缩子过程4与膨胀子过程2中,气体多方指数n取值为1.4~1.6;而在压缩子过程1与膨胀子过程3中,气体多方指数n取1.15。气体多方指数n的取值对压力水流冲击截留气团的结果有一定影响,n值越小,水流冲击截留气团的压力越大;反之越小。更多还原

【Abstract】 According to the experimentation and the theory,research on gas properties and current rush to interception air-mass in the delivery pipeline system are made.The studies indicated that the gas thermal insulation coefficient determining primary properties of the air-mass changes apparently instead of a single constant when hydraulic transition process happens .So four appropriate processes are given,namely sub-process 1 of compressing, sub-process 2 of inflating,sub-process 3 of inflating,and sub-process 4 of compressing.In the sub-process 2 of inflating and sub-process 4 of compressing,the gas thermal insulation coefficient is 1.4～1.6,and is 1.15 in other two processes.The value of gas thermal insulation coefficient has definitely influence on the result of the analytic root of current rush to interception air-mass in the delivery pipeline system.The more small gas thermal insulation coefficient is,the more great the press of current rush to interception air-mass is,and and vice versa.更多还原