Design and test results of an advanced liquid hydrogen turbopump

Abstract

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System performance tests and start transient analysis of a liquid rocket engine turbopump

“…They used cold gas for the low speed run and hot gas for the full speed run during the turbopump assembly test. In expander cycle engines, [6][7][8][9][10] turbopump hot-fire tests are not necessary, and therefore cold gas is used for the turbopump assembly test. Cold hydrogen gas was used in a test of the fuel turbopump for an LE-7A engine, which is a staged combustion cycle engine, and a full load run was accomplished by increasing the turbine pressure ratio.…”