Simulation study on thermal performance of two turns helium cryogenic oscillating heat pipe for superconducting accelerator

Purpose In recent years, with the further development of superconducting technology, superconducting devices have been applied in particle accelerators and synchrotron radiation light source devices. As a new type of heat transfer structure, helium cryogenic oscillating heat pipe can be used to balance local hot spots in superconductors and improve heat transfer performance. Methods In this paper, a two- dimensional two-turns helium cryogenic oscillating heat pipe model is established. The flow performance of helium cryogenic oscillating heat pipe was analyzed by CFD simulation. Results and conclusion The results show that the development of flow pattern in the helium cryogenic oscillating heat pipe first forms bubble flow under the heating of the evaporation section, and then gradually forms slug flow and annular flow. The process consists of initial stage, transition stage and running stage. In the running stage, the effective thermal conductivity of COHP oscillates around 15,000 W/(m·K).