11.饱和状态 Saturation state 饱和状态:汽化与凝结的动态平衡 12蒸发( Evaporize)和沸腾( Boiling) 13.千度( Dryness) 14汽化潜热( Latent heat)
11.饱和状态 Saturation state 饱和状态：汽化与凝结的动态平衡 12.蒸发（Evaporize）和沸腾（Boiling) 13.干度（Dryness) 14.汽化潜热（Latent heat)
15.未饱和湿空气( Unsaturated Air) Dry air+ Superheated water vapor 干空气和过热水蒸汽的混合物。 饱和湿空气( Saturated air) Dry air+ saturated water vapor 干空气和饱和水蒸汽的混合物
15. 未饱和湿空气(Unsaturated Air) Dry air+ Superheated water vapor 干空气和过热水蒸汽的混合物。 饱和湿空气(Saturated Air) Dry air+ Saturated water vapor 干空气和饱和水蒸汽的混合物
16露点温度(Dew- point Temperature) It is defined as the temperature at which condensation begins when the air is cooled at constant pressure 17相对湿度q( Relative Humidity of Air) It is defined as the ratio of the amount of moisture in the air to the maximum amount of moisture the air can hold at the same temperature 湿空气中实际包含的水蒸汽量与同温度下最多能包 含的水蒸汽量的百分比
16.露点温度(Dew-point Temperature) It is defined as the temperature at which condensation begins when the air is cooled at constant pressure. 17.相对湿度φ (Relative Humidity of Air) It is defined as the ratio of the amount of moisture in the air to the maximum amount of moisture the air can hold at the same temperature. 湿空气中实际包含的水蒸汽量与同温度下最多能包 含的水蒸汽量的百分比
18含湿量( Humidity ratio) 含湿量d:以干空气为基准,包含1千克干空气 的湿空气中中所含有的水蒸汽的质量 The mass of water vapor present in a unit mass of dry air is called humidity Ratio
18.含湿量(Humidity ratio) 含湿量d：以干空气为基准，包含1千克干空气 的湿空气中中所含有的水蒸汽的质量。 The mass of water vapor present in a unit mass of dry air is called humidity Ratio
19马赫数:( The mach number)M It is the ratio of the flow speed, c to the velocity of sound in the same fluid at the same state it is denoted as m 流体在某一点的运动速度和该点当地声速之比,以M表示)
19.马赫数：（The Mach number） M, It is the ratio of the flow speed, c, to the velocity of sound in the same fluid at the same state. It is denoted as M. (流体在某一点的运动速度和该点当地声速之比, 以M表示)