The result shows that fracture due to thermal stress may occur when effective pump energy is up to 10kW/cm2 and the increase of heat transfer coefficient can reduce the temperature but may increase the maxim thermal stress.

• 研究结果表明:有效泵浦功率密度达到10kW/cm2量级时,介质可能发生热致断裂; 增大强迫对流换热系数会减少温升,但端面处温度梯度增大,热应力可能增大。