Formation of requirements to the laboratory experimental unit under condition of continuation of researches of processes of heat and mass transfer on a model experimental unit

Abstract

Theoretical results of modeling of vacuum process of evaporation of model liquid in closed volume, carried out for experimental laboratory unit (ELU) and experimental model unit (EMU), differing in size, boundary and initial conditions are considered. The parameters of EMU are determined on the basis of the theory of similarity to the processes taking place in the tank of the launch vehicle stage in the field of small overloads, and the parameters of the ELU selected from the conditions of the existing laboratory equipment. The correlation functions of the process parameters (mass and temperature), showing the degree of proximity of the processes, have been calculated on the example of the process of liquid evaporation under vacuum effects for ELU and EMU, obtained by using the ANSYS Fluent software package. In the course of numerical experiments the vacuum pump capacity was varied to ensure equality of Nusselt criterion for ELU and EMU.