在超流氦的沸腾实验中，随着静压液柱高度h的降低，会出现不同的沸腾状态。在噪声沸腾中，一个与平板加热器大小相当的气泡在其表面上反复地长大、缩小，并伴随着巨大的噪声和剧烈的机械振动；在无噪声沸腾中，在平板加热器表面形成一个极稳定的气膜，并且，没有噪声和机械振动出现；而在两者之间，存在一个过渡的沸腾状态。通过沸腾过程中的压力振动测量和可视化测量，对不同沸腾状态进行了研究
With the decrease of the immersion depth, h, different boiling modes appearin superfluid helium II. A big vapor bubble comparing to the heater size isfound to expand and crush on the heater surface accompanied with a loud noiseand serve mechanical vibration during noisy film boiling; a stable vapor filmis observed on the heater surface without noise and vibration during silentfilm boiling; and there is transition boiling between noisy and silent filmboiling modes. Those boiling modes are studied by the aid of Schilerenvisualization method and pressure measurement
参考文献
| [1] | M. Progress in Space Cryogenics[J].Journal of JapaneseCryogenics Society,1990,25:373. |
| [2] | 张鹏 .超流氦膜沸腾的物理机理研究[D].上海:上海交通大学,1998. |
| [3] | M Iida T;Shimazaki T et al.The InitialThermo-Fluiddynamic Processes of Boiling Phenomena in He II[J].Cryogenics,1996,36:175. |
| [4] | Y Murakami M;Iida T et al.Visualization Studyof Noisy and Silent Film Boiling Phenomena on a Plane Heater in He II[J].Cryogenics,1994,34(Suppl):333. |
| [5] | Y Murakami M;Iida T et al.Visualization Studyof Film Boiling Onset and Transition to Noisy Film Boiling in He II[J].CRYOGENICS,1995,35:631. |
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