• 作者： 洪儒珍
• 作者服務機構： 美國阿拉巴馬大學機械工程學系
• 中文摘要： 　　本文討論在極低溫度下，超流體和正常流體氦體Ⅱ在微重力影響下之動態。極低溫氦Ⅱ是太空船，人造衛星及太空梭不可或缺之火箭發動機推進劑，和太空飛行員賴以維生的能源。在太空船大型旋轉容器中，利用超流體與正常流體氦之不可分隔性，極低溫液態氦與氣態氦之動態，可以應用古典理論的計算方式，探討其穩定性。本文並舉例說明其應用。
• 英文摘要： Cryogenic fluid systems are required for space-based transportation systems in propellant manage-ment, attitude control. mechanical stability, life-support system, etc., under a microgravity environment.In particular, cryogenic helium is required for propellant tank pre-pressurization of spacecraft for eachmain-engine start. In Gravity Probe-B spacecraft, superfluid liquid helium systems support experimentswhich use superconducting sensors for gyro read-out and very low temperature for mechanical stabilityThis paper discusses the physical behavior of superfluid and normal fluid helium II. and concludes thatthe centrifugal force due to a rotating container can never separate the superfluid from the normal fluidhelium in a large rotating cylinder spacecraft. A classical approach is proper for treating superfluid andnormal fluid cryogenic helium as a mixture without separation in a large rotating cylinder for spacecraftpropellant systems. Examples are given to discuss the behavior of profiles between helium vapor and cryo-genic liquid helium containing a superfluid and normal fluid mixture.
• 中文關鍵字： vrygenic fluid system; superfluid liquid helium; microgravity fluid management; spacecraft cryogenic propellant; cryogenic helium II
• 英文關鍵字： --