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为了研究脉动热管用于冷却Mg B——2超导磁体的可行性,对一台自行研制的液氢温区脉动热管实验台开展了实验研究工作。充液率为34.2%时,随着加热功率的增大,脉动热管经历了启动、脉动、极限3个阶段,启动阶段中脉动热管传热温差波动很大,传热性能差,而脉动阶段中脉动热管传热温差很小,传热性能好。脉动热管在加热功率为1.28 W时具有最高的有效热导率为19 k W/m·K,此时蒸发段与冷凝段温差为0.28 K。
In order to study the feasibility of using pulsating heat pipe to cool Mg B - 2 superconducting magnet, an experimental study on a pulsating heat pipe experimental platform of liquid hydrogen temperature developed by ourselves was carried out. When the charging rate is 34.2%, with the increase of heating power, the pulsating heat pipe has experienced three stages of start-up, pulsation and limit. During the start-up phase, the pulsating heat pipe has a large temperature difference and poor heat transfer performance. Pulsating heat pipe heat transfer temperature is small, good heat transfer performance. The pulsating heat pipe has the highest effective thermal conductivity of 19 k W / m · K at a heating power of 1.28 W, at which time the temperature difference between the evaporator section and the condenser section is 0.28 K.