Abstract:
passive propellant management system for a spacecraft liquid propellant tank (1) comprises several preferably V-shaped channels (2) which communicate liquid propellant from regions within the tank (1) to an outlet port (8), which expels liquid propellant but not pressurant gas. A liquid/bubble chamber assembly (9) couples the channels (2) with the outlet port (8). The channels (2) comprise relatively open portions (11) and relatively closed portions (10). In the relatively open portions (11), liquid is retained in a gap (12) between open ends of the V channels (2) and the inner wall of the tank (1 ). In the relatively closed portions (10), a screen, mesh or perforated plate (14) covers the open end of the V channels (2), intermediate the V channels (2) and the inner wall of the tank (1). The placement of the relatively open and closed portions (11, 10), respectevely is intentionnally preselected based upon mission requirements. Where pressurant gas ullage is expected to be present, e.g., during period of high g, relatively open portions (11) are used. Where liquid propellant is expected to be present, e.g., during periods of relatively low g, relatively closed portions (10) are used. The liquid/bubble chamber assembly (9) comprises a liquid trap (27) and bubble trap (28), which operate synergistically with each other and with the channels (2) to provide optimum liquid flow during all phases of the spacecraft mission.
Abstract:
The invention relates to a surface tension storage tank comprising a liquid outlet from where the liquid can be expelled under the action of a pressurant gas. A collector device issues into a chamber of a tubular device which also comprises a draining conduit opening at one end at the bottom of said chamber, the other end being situated higher than the first when the tank is being filled. On the side opposite its bottom, the chamber is situated close to the liquid-expelling orifice from which it is separated by an outlet gas barrier. Gas barriers are also provided at the other end of the conduit and on the level of the junction of the collector device with the said chamber.
Abstract:
(s) Le réservoir à liquide comprend un récipient (1) contenant une jauge de niveau (3), un élément indicateur (9) de la position de la jauge (3) disposé à l'extérieur du récipient (1), et un conduit de remplissage (2) du récipient (1) muni d'une électrovanne (10), un récipient (1) à flotteur (3) modifiant la résistance (9) en fonction de son niveau. On surveille la valeur de la résistance (9) en fonction du temps à partir du débit du remplissage afin de détecter toute anomalie à l'intérieur du récipient (1).
Abstract:
Element d'isolation, de preference pour l'isolation thermique de reservoirs (10, 12) pour des gaz liquefies ou analogues, comprenant deux couches (1, 2) de polystyrene flexible, qui sont collees a une couche de renforcement flexible (3) prise en sandwich. L'element est pourvu d'un cote d'une feuille d'aluminium (4) qui est collee sur la mousse de plastique a l'exception de certaines parties (5-8). La feuille d'aluminium fait office de raidisseur a l'endroit ou elle est collee sur la mousse de plastique, de maniere que l'element plie aux endroits ou la feuille n'est pas collee lorsqu'il est soumis a un effort de flexion. Un procede de fabrication de l'element ainsi qu'une utilisation speciale de celui-ci sont aussi decrits.
Abstract:
본 발명은 유체 저장 설비(fluid-storage facility)에 관한 것으로서, 상기 저장 설비는 지지 구조물(1)과 탱크를 포함하며, 상기 탱크는 상기 지지 구조물(1)에 부착된 적어도 하나의 탱크 바닥 벽을 포함하고, 상기 바닥 벽은 적어도 하나의 유체밀봉 멤브레인 및 상기 유체밀봉 멤브레인과 상기 지지 구조물(1) 사이에 배치된 적어도 하나의 단열 장벽을 포함하며 두께 방향으로 겹쳐진 다수의 층들을 가진 구조를 가지며, 상기 바닥 벽은 측벽(12)을 포함하는 강성 용기(rigid container)(10, 11)를 구비한 섬프 구조물(sump structure)(9)을 포함하며, 상기 용기(10, 11)는 상기 바닥 벽의 두께를 관통하도록 배치되며, 상기 섬프 구조물(9)은 부착 지점에서 상기 강성 용기(11)를 상기 지지 구조물(1)에 부착시키도록 배치된 적어도 하나의 부착 수단(15)을 포함하고, 상기 적어도 하나의 부착 수단(15)은, 상기 용기(11)의 부착 지점에서 상기 측벽(12)에 대해 직각인 횡단 방향으로, 상기 지지 구조물(1)에 대하여 상기 용기(10, 11)의 측벽(12)의 상대적인 움직임을 허용하도록 구성된다.