LE-7液酸ポンプインデューサの試作研究

概要

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A liquid oxygen turbopump has been developed for the main engine (LE-7) of the H-II rocket. The turbopump requires a high-flow and high-pressure liquid oxygen main pump. Because the LE-7 engine does not use a low-speed and low-pressure pump ahead of the main pump which is applied to the space shuttle main engine, it is very important to operate the main pump at higher speed for smaller size and lighter weight of the turbopump. The operational speed was restricted by the suction performance of the main pump inducer with the present turbopump. This paper shows both the design and test results of the inducer. In particular, a problem of supersynchronus shaft vibrations and its suppression method are described in more detail. The shaft vibration is considered to be closely related to rotating cavitation in the inducer.
一般社団法人日本機械学会の論文
1991-12-25