| 摘要 |
A natural circulation pumping system, used in a plume pumping system for a test engine, having a liquid coolant in a reservoir-separator which supplies the liquid to a plurality of insulated downcomer tubes. The downcomer tubes are connected at their lower ends to an annular manifold. The liquid is returned to the reservoir-separator through a plurality of riser tubes wherein the vaporizing of the liquid, by the heat added, causes the liquid to circulate, since the liquid-vapor mixture in the riser tubes has less weight than the liquid in the downcomer tubes. Natural separation takes place in the reservoir-separator as the heavier liquid falls into the liquid pool and the light gas rises to be vented.
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