A Numerical Method to Analyze Unsteady Heat Transfer and Flow During Chilldown of a Cryogenic Transfer Line

摘要

The subject of this paper is a numerical method, devised to perform transient venting analyses and to describe the corresponding temperature response of a Cryogenic Transfer Line (CTL). In the present treatment, the CTL was regarded as a single control volume, into which a saturated liquid cryogen was introduced. Unsteady mass, momentum and energy conservation equations (i.e. for the liquid and vapor phases) were solved in conjunction with Vanderwaal's equation of state. A fully-implicit, successive substitution method was employed to solve the resulting coupled, non-linear equations. A corresponding FORTRAN code was developed to predict the pressure and temperature histories, within a CTL, for a proposed ground test facility at the Marshall Space Flight Center. This paper includes a description of the test article and procedure.