Computational design techniques for liquid hydrogen fluid machinery are presented while drawing on a wealth of experience gained in the liquefied natural gas sector. Computational fluid dynamics, computational rotordynamics, and computational stress analysis are utilized as key design validation tools. Recent advances in computational design procedures to incorporate the influence of unsteady phenomena are introduced. The described design technique has been proven in the liquefied natural gas sector to increase overall machine reliability, efficiency, and predictability. An example of current design capabilities is presented for an Ebara Cryodynamics multi-stage impeller/diffuser-return vane combination operating in liquefied natural gas. The fluid machinery characteristics are compared for both liquid hydrogen and liquefied natural gas to prove the technical feasibility of industrial liquid hydrogen fluid machinery.
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