常見例句雙語例句The trim exponents vary with the fluid viscosity and impeller diameter ratio at same time.切割指數同時隨著切割后的直徑比和液體粘度變化而變化。Taking fan noise as a target, impeller diameter, hub ratio & speed as design variables , the fan noise can be reduced as low as possible by optimization design program.以風機噪聲為目標,取葉輪直徑、輪轂比及轉速為設計變量,通過優(yōu)化設計程序,可以使所設計的風機噪聲盡可能小。Final design scheme is confirmed after economic and technical analyse. Then, axial fan 's stage type, impeller diameter, hub ratio , specific speed and the number of blades are decided.在進行經濟技術性分析后,最終確定風機的設計方案,進而確定通風機適當的級型式、葉輪尺寸、輪轂比、轉速和葉片數等基本參數。 返回 impeller diameter