Flight Test Facilities of space launch vehicle including combustion gas backflow prevention manifold assembly

The present invention relates to a high-altitude test facility for a space launch vehicle. The high-altitude test facility of the space launch vehicle of the present invention is provided in the high-altitude test facility of the space launch vehicle including a vacuum chamber and a diffuser, and communicates with the vacuum chamber and the diffuser. On the other hand, by including a manifold assembly having a structure which prevents a reverse flow of an exhaust gas due to a negative pressure generated inside the vacuum chamber after a test is completed, the high-altitude test facility of the space launch vehicle can prevent contamination of the vacuum chamber and an engine, and shorten a working time for exhausting a toxic gas remaining inside the vacuum chamber. 본 발명은, 진공챔버 및 디퓨저를 포함하는 우주발사체의 고공시험설비에 구비되어, 진공챔버와 디퓨저를 연통하되, 시험 종료이후 상기 진공챔버 내부에서 발생된 음압에 의한 배기가스의 역류를 방지하는 구조를 갖는 매니폴드조립체를 포함함으로써, 진공챔버 및 엔진의 오염을 방지하고, 진공챔버 내부에 잔존하는 유독가스 배출을 위한 작업 시간을 단축할 수 있는 우주발사체의 고공시험설비에 관한 것이다.