Failure Analyses of Idle Spin Phenomena in Liquid Hydrogen Pumps for Rocket Engines

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  • ロケット用液化水素ポンプの過渡時に発生する空転現象の解明
  • ロケットヨウ エキカ スイソ ポンプ ノ カトジ ニ ハッセイ スル クウテン ゲンショウ ノ カイメイ

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Abstract

Idle spin phenomena were observed at rapid transient phase in liquid hydrogen pumps for rocket engines. Failure analyses were conducted and evaluation equations to estimate the shift of the operation point of the pump were derived in this paper. It was revealed that rapid fall of hydrogen flow rate resulted in decrease of pump efficiency which caused excessive temperature rise up to the saturation of the pump fluid.

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