Oxygen Supply and Recovery System for Closed Environment such as a Space Station.-Fromation of blue-green algae Cultivated Field under Microgravity-

空间站等封闭环境的供氧及回收系统-微重力下蓝绿藻培养田的形成-

基本信息

批准号：
08651084
负责人：
ANDO Koji
金额：
$ 1.47万
依托单位：
Muroran Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

From the viewpoint of oxygen supply and recovery in the closed environment such as a space station, the formation possibility of the blue green algae cultivated field under microgravity was experimentally investigated.The 10m-high drop tower at the Hokkaido National Industrial Research Institute (HNIRI) and the 500m-high drop tower at the Japan Microgravity Center (JAMIC) were used to create the microgravity environment. The HNIRI and the JAMIC drop towers provided a microgravity period of approximately l.2s (g_2/g_0<10^<-3>G) and 10s (g_2/g_0<10^<-4>G), respectively. The dimensions of the experimental setup at the HNIRI drop tower are 600Dx425Wx910H.The dimensions of the experimental setup at the JAMIC drop tower are 870Dx425Wx918H and 425Dx425Wx918H.The diameter and volume of reactor ranged from 0.055 to 0.13m and from 8.5x105 to l.3xl0-3 m3, respectively. An 8mm video camera was fixed on the lateral part of the reactor and was used to observe and record the change in the gas-liquid … More interface during the drop. The character generator was used to record the drop time on the tape.A cylindrical vessel partially filled with water was rotated to form low centrifugal force(approximately, 10^<-1>G at the wall side of the vessel) under microgravity created in the drop tower. The interface shape of the gas-liquid systems in a rotating speed of the vessel was observed and recorded. The effects of diameter and rotating speed of vessel, liquid volume, liquid viscosity and surface tension on the interface shape were investigated. Hollow flow formation was considered to be suitable for oxygen supply and recovery system that an air phase was located in the center of the vessel and the air-water interface contacted with both the bottom and the top-cover of the vessel. The possible and/or impossible regions to form the hollow flow in were dearly divided in the formation map for the microgravity gas-liquid systems in a rotating vesseL The map indicates that the formation of the hollow flow under microgravity could be predicted by the Weber number and the ratio of the liquid/vessel volume. We concluded from the formation map that the optimum condition was obtained when We=8 and V_1/V_T=0.80. because a power consumption, namely, the rotating speed of the vessel, became a minimum. Less

From the viewpoint of oxygen supply and recovery in the closed environment such as a space station, the formation possibility of the blue green algae cultivated field under microgravity was experimentally investigated.The 10m-high drop tower at the Hokkaido National Industrial Research Institute (HNIRI) and the 500m-high drop tower at the Japan Microgravity Center (JAMIC) were used to create the microgravity environment. Hniri和Jamic Drop Towers的微重力周期分别为L.2s（G_2/G_0 <10^<-3> G）和10s（G_2/G_0 <10^<-4> g）。 Hniri Drop Tower的实验设置的尺寸为600DX425WX910H。JamicDrop Tower的实验设置的尺寸为870DX425WX918H和425DX425DX425WX918H。 M3分别。将一个8mm的摄像机固定在反应堆的侧面，并用于观察和记录气体液体的变化……在液滴过程中更多的接口。字符发生器用于记录磁带上的下降时间。旋转一部分充满水的圆柱体容器，形成低离心力的低离心力（大约10^<-1>在容器的墙壁侧）在滴塔中产生的微重力下方。观察并记录了容器旋转速度以旋转速度的气体液体系统的界面形状。研究了直径和容器的旋转速度，液体体积，液体粘度和表面张力对界面形状的影响。空心的流动形成被认为适用于氧气供应和回收系统，该系统位于容器的中心，并与容器的底部和顶部接触空气水接口。在旋转容器中，在微重力气体液系统的地层图中，可能和/或不可能的区域在旋转容器中的地层图中很少分配。地图表明微重力下空心流的形成可以通过韦伯数量和液体/容器体积的比率来预测。我们从编队图中得出结论，当我们= 8和v_1/v_t = 0.80时，获得了最佳条件。因为船只的旋转速度是最低的，即旋转速度。较少的