Computer programs for pressurization (RAMP) and pressurized expulsion from a cryogenic liquid propellant tank
Computer programs for pressurization (RAMP) and pressurized expulsion from a cryogenic liquid propellant tank
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发表时间：
1974-07
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通讯作者：
P. A. Masters
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作者：
P. A. Masters
本文对低温液体推进剂从贮箱中卸出时的压气需求量进行了分析，提出了一种计算方法和两个计算机程序，沿着。一个程序处理增压（斜坡）阶段，使推进剂箱的工作压力。分析方法涉及在时间和空间上的离散点集上的罐罐空的温度和速度函数的数值解。程序的输入要求是初始气隙条件、加压气体的初始温度和压力以及排出或斜坡的时间。进行计算，确定气隙气体和罐壁之间的热传递。到液体界面和到硬件部件的热传递可以包括在分析中。程序输出包括所需加压剂质量、总能量传递以及壁温和罐空温度的预测。文中给出了分析、算法、输入输出的完整描述和FORTRAN 4程序清单。包括示例案例来说明程序的使用。
An analysis to predict the pressurant gas requirements for the discharge of cryogenic liquid propellants from storage tanks is presented, along with an algorithm and two computer programs. One program deals with the pressurization (ramp) phase of bringing the propellant tank up to its operating pressure. The method of analysis involves a numerical solution of the temperature and velocity functions for the tank ullage at a discrete set of points in time and space. The input requirements of the program are the initial ullage conditions, the initial temperature and pressure of the pressurant gas, and the time for the expulsion or the ramp. Computations are performed which determine the heat transfer between the ullage gas and the tank wall. Heat transfer to the liquid interface and to the hardware components may be included in the analysis. The program output includes predictions of mass of pressurant required, total energy transfer, and wall and ullage temperatures. The analysis, the algorithm, a complete description of input and output, and the FORTRAN 4 program listings are presented. Sample cases are included to illustrate use of the programs.