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针对推进剂加注系统工序转换中因瞬变过程而导致的安全隐患问题,采用数值计算方法,从阀门的特性及动作规律角度入手,研究其对加注工序转换过程中管道压力及流量瞬变过程的影响。通过理论分析与基于案例的数值计算发现:阀门的固有特性与动作规律共同影响着瞬变过程,相同的瞬变结果可由不同类型的阀门与相应的阀门动作规律实现;在阀门动作时间一定,且大于压力波传播周期的情况下,动作规律指数m与固有特性指数n之积等于1时所产生的压力峰值最小;随着mn值偏离数值1程度的增大,管道压力峰值逐渐增大,管道中出现汽蚀的风险也加大。因此,在推进剂加注过程中,应针对阀门类型选择阀门动作规律,以有效控制管内瞬变过程。
Aiming at the potential safety problems caused by the transient process in the conversion process of the propellant filling system, the numerical calculation method was used to study the characteristics of the valve and the operating rules. The impact of the process. Through the theoretical analysis and case-based numerical calculation, it is found that the inherent characteristics of the valve and the action law jointly affect the transient process. The same transient result can be achieved by different types of valves and the corresponding valve operation rules. When the valve operation time is constant and Is greater than the pressure wave propagation period, the pressure peak value produced when the product of the law of action index m and the inherent characteristic index n is equal to 1 is the smallest; as the value of mn deviates from the value 1, the peak value of pipeline pressure gradually increases, The risk of cavitation increases. Therefore, in the process of filling the propellant, the valve action law should be selected according to the valve type to effectively control the transient process in the pipe.