A Study on the Flow Instability in Evaporator of Gravity Separate Type Heat Pipe

作者：Zhu Yuqin; Bi Qincheng^*; Chen Tingkuan; Pu Lin

来源：Microgravity Science and Technology, 2008, 20(3-4): 281-285.

DOI：10.1007/s12217-008-9021-8

• Flow instability
• Gravity separate type heat pipe
• Evaporator

The flow characteristics and instability in the small inclination angle evaporator of Gravity Separate Type Heat Pipe (GSTHP) were studied. Flow patterns were investigated by a quartz glass tube with a phi 25 x 2 mm in evaporator of GSTHP. Two types of flow instabilities occurred, which are the flow pattern transition instability and density wave instability. The effects on the flow instability, such as inlet subcooling, heat flux, pressure, and outlet throttle resistance, were determined in the modeling experiment within the following parameter ranges: the inlet subcooling T-sub = 8 similar to 28 degrees C, the heat flux q = 10 similar to 40 kW/m(2) and the throttle coefficient K-i = 0.5 similar to 0.75. The limits of the flow pattern transition instability and the density wave instability were obtained.

• 出版日期2008-9
• 单位西安交通大学; 西安石油大学