AMPLIFICATION OF THE WALL TEMPERATURE PULSATIONS UNDER TRANSITION POOL BOILING

The theoretical investigation of the amplification effect of the wall temperature pulsations by transition boiling is carried out. It is sho wn for three cases that small temperature pulsations of a hot liquid m ay be considerable amplified under transition boiling. The analytical and numerical solutions of problem for distribution of the temperature pulsations along the rod are obtained. Influences of frequency pulsat ions and Section length of transition boiling on an amplitude of the p ulsations are established. If the transition boiling on a wall heated by hot liquid is unstable then considerable pulsations may be occurred by cyclical change of boiling regimes. For case of unstable transitio n boiling the difference in of amplification mechanism of low and high frequency pulsations is noted. The cases under consideration serve to illustrate effect of an amplification of the wall temperature pulsati ons and the methods an estimating of this amplification.