Results of BDH Experiment in TR-IA 1st Flight　—Results of Pool Boiling -

Abstract

As the first experiment of BDH (Bubble Dynamics and Handing) module in TR-IA sounding rocket, a pool boiling experiment with a transparent glass heater and an interferometer was conducted under a relatively low heat flux. During six minutes of microgravity condition, boiling phenomena observation and interferometric observation were schemed in addition to the acquisition of heat transfer data. The heat transfer characteristics showed a large influence due to liquid subcooling, and the interferometric observation implied the existence of stationary microlayer under isolated bubbles.