Effect of surface condition on high heat flux boiling phenomena in various liquids

1.不同表面条件下卧式试验加热器在水池中高热流沸腾的研究在过冷至60k时，在压力约为2 MPa的水池中，测量了镜面加工和粗糙表面的卧式汽缸的过冷池沸腾临界热流。在相同的实验条件下，与已有的具有商品表面的圆柱体的相应数据进行了比较。基于水动力不稳定性（HI）曲线和非均相自发成核（HSN）曲线，粗糙表面的CHF值与商业表面对应的CHF值吻合较好。在不同的过冷、过冷、过压范围内，用卧式汽缸在一池水和高度湿润的液体（如乙醇）中测量了不同周期的稳态和瞬态CHFs。稳态CHFs用不同压力下非均相自发成核的相关性来表示。根据周期的不同，将瞬态chf分为两大类。在压力下，chf随着过冷度的增加而增加，并且与高过冷度时的压力无关。湿液池中水平加热器快速降压瞬态沸腾的研究利用实测的乙醇传热过程，包括快速降压随周期呈指数下降引起的瞬态CHFs，研究了系统压力指数下降引起的从自然对流和核状沸腾的初始热流到膜状沸腾的瞬态沸腾过程的特征clarified.4。高热流密度强化过冷流动沸腾CHF的研究。在深入研究的关系中，利用现有的数据库澄清了以出口压力为参数的水平和垂直管道中以流动过冷却水为参数的过冷水流量沸腾CHF与出口过冷的关系，最近扩展了在不同管道内径和长径比的管道中以出口压力为流速的过冷水流量沸腾CHF与出口过冷的关系参数。少

1.Research on high heat flux boiling on horizontal test heater with various surface conditions in a pool of waterThe subcooled pool boiling critical heat fluxes on the horizontal cylinders with mirror finished and rough surfaces in a pool of water at the pressures up to about 2 MPa for the subcoolings up to 60 K were measured. The results compared with corresponding data for the cylinder with commercial surface already obtained for the same experimental conditions. The CHF values for rough surface were good agreement with those obtained by the correlation corresponding to commercial surface based on hydrodynamic instability (HI) and heterogeneous spontaneous nucleation (HSN) curves.2.Research on high heat flux boiling on horizontal test heater with various surface conditions in various wetting liquidsSteady-state and transient CHFs were measured by using a horizontal cylinder in a pool of water and highly wetting liquid such as Ethanol with various periods for wide ranges of subcooling … More and pressure. The steady-state CHFs were expressed by the correlation base on heterogeneous spontaneous nucleation at various pressures. The transient CHFs depending on the periods were divided into two principal groups. The CHFs increase with an increase in subcooling at pressures and they are independent of pressures at high subcoolings.3.Research on transient boiling due to rapid depressurization on horizontal heater in a pool of wetting liquidThe characteristics of the transient boiling processes for the transitions from the initial heat fluxes in natural convection and nucleate boiling regimes to film boiling regime caused by the exponentially decreasing system pressures using measured heat transfer processes for ethanol including transient CHFs caused by the rapid depressurizations decreasing exponentially with the periods were clarified.4.Research on subcooled flow boiling CHF with high heat flux enhancement.In the relation of deep research, the subcooled water flow boiling CHFs versus outlet subcoolings for a flow velocity with outlet pressures as a parameter in the horizontal and vertical tubes with enhancement having flowing subcooled water were clarified using the existing databases expanding quite recently derived the correlations representing the subcooled water flow boiling CHF versus outlet subcooling in tubes with various tube inside diameter and length-to-diameter ratios for a flow velocity with outlet pressure as a parameter. Less