An experimental investigation of the boiling crisis in a forced convection Freon 113 flow

The authors describe an electronic set-up allowing the control and prevention of the boiling crisis by having the dissipated heat flux controlled by the heater temperature. The experimental design allows to reach the maximum heat flux and the transition boiling regime without burnout. The heating wall is 5 cm long tube with a 8 mm inner diameter. The fluid flows up vertically in the tube. After briefly describing the Freon 113 loop and the testing procedures, boiling curves of heat flux versus temperature difference comprising stabilized transition zone are presented. The influence of several physical parameters (pressure, mas flow rate, inlet temperature) on the boiling mechanisms is investigated. Some particular phenomena encountered during the tests are discussed