Wilson C, Borgmeyer B, Winholtz R A, Ma H B, Jacobson D, Hussey D
Department of Marine Engineering, Dalian Maritime University, Dalian 116026, PR China.
Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65201.
J Heat Transfer. 2011 Jun;133(6). doi: 10.1115/1.4003546.
A visual and thermal experimental investigation of four oscillating heat pipes (OHPs) was conducted to observe fluid flow of liquid plugs and vapor bubbles in the OHP and its effect on the temperature distribution and heat transfer performance in an OHP. These four OHPs consist of an open loop water OHP, an open loop acetone OHP, a closed loop water OHP, and a closed loop acetone OHP. These copper OHPs were constructed identically with all six turns in the same plane. They were constructed out of 1.65 mm inner diameter copper tubing and copper heat spreading plates in the evaporator and condenser regions. The heat pipes were charged at a filling ratio of about 50%. The results show that the acetone OHP at low power performs better than the water OHP, while at high power the water OHP exceeds the acetone OHP. The experimental results show that both the acetone and water closed loop OHPs had reduced movement in the connecting turn between the two sides. However, in the water closed loop OHP, this prevented circulation altogether. Comparing the water closed loop OHP to the water open loop OHP, their flow patterns were similar. Therefore, improving the flow in this turn should increase the closed loop OHP's performance.
对四根振荡热管（OHP）进行了视觉和热学实验研究，以观察热管内液塞和汽泡的流体流动及其对热管温度分布和传热性能的影响。这四根振荡热管包括一个开环水振荡热管、一个开环丙酮振荡热管、一个闭环水振荡热管和一个闭环丙酮振荡热管。这些铜质振荡热管结构相同，所有六个转弯都在同一平面内。它们由内径为1.65毫米的铜管以及蒸发器和冷凝器区域的铜质散热板制成。热管的充液率约为50%。结果表明，低功率下丙酮振荡热管的性能优于水振荡热管，而在高功率下，水振荡热管超过了丙酮振荡热管。实验结果表明，丙酮和水闭环振荡热管在两侧之间的连接转弯处的运动都有所减少。然而，在水闭环振荡热管中，这完全阻止了循环。将水闭环振荡热管与水开环振荡热管进行比较，它们的流动模式相似。因此，改善该转弯处的流动应能提高闭环振荡热管的性能。
