The gas field in pemfc means the gas distribution in gas source , gas inlet tube ( scale of m ) , gas - blower , gas manifold ( scale of cm ) , channel ( scale of mm ) , diffusion layer ( scale of um ) , hydrophobic layer and catalyst layer ( scale of nm ) . the aim of changing the scales is to make oxygen reach reaction area as evenly as possible Pemfc的气场指在气源、进气管(分米级) 、风机、进气箱(厘米级) 、流道(毫米级) 、扩散层(微米级) 、疏水层(亚微米级) 、催化层(纳米级)中的气体分布,每一级尺度的变化是为了气体的进一步均匀化。
Secondly , the paper analyzes abnormal performance in diesel engine according to engine structure model and function model . the system of diesel engine is divided into several subsystems , such as inlet tube , cylinder , exchange tube , turbo charger . all these subsystems are zero - dimension system 其次,根据柴油机的功能模型和结构模型,对柴油机热工故障作了较深入的分析,把柴油机系统划分为进气管、气缸、排气管、涡轮增压器等零维子系统,建立了一个较通用的柴油机热工故障的零维仿真模型。