Investigation of the transient processes in channels with a two-phase cryogenic agent and underheating at the inlet

Abstract

A characteristic of modern cryostatic systems for power-generating objects is the complex operating mode with prolonged heat evolution pulses (lasting for more than 1 sec)~ uniformly distributed along the channels, with a thermal flux density of 10-50 W/m 2 [i]. At such heat loads the temperature of the cryogenic agent can rise above the permissible value, based on the condition of maintaining the temperature of the channel walls (the current-carrying element) within a relatively narrow interval; variations in the flow rate can also occur at the channel outlets which can disturb the normal operation of the cryogenic supply system. It must be pointed out that prolonged pulsed heat liberations in the operation of cryogenergetic installations can occur regularly, i.e., that they can repeat themselves at regular time intervals.