Experimental investigation of surface wettability induced runback water flow and heat transfer behavior

Ma, Kuiyuan; Lin, Guiping; Jin, Huixia; Jia, Qi; Sun, Haoyang; Bu, Xueqin; Shen, Xiaobin; Wen, Dongsheng

doi:10.1016/j.ijheatmasstransfer.2023.124164

Cited by 3 publications

(1 citation statement)

References 64 publications

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“…Li et al investigated the characteristics of icing on the surface of wind turbine blades by varying the relative humidity by spraying water droplets of different diameters and water mists of different flow rates, and calculated and analyzed the icing rate and icing area. Many other scholars have studied the effect of different surface structures on ice crystal growth while considering the relative humidity. − The literature presented above focuses on the effect of humidity on macroscopic icing, but macroscopic icing rarely reflects the mechanical properties of ice. The microstructures of different types of ice have different mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Ice Crystal Dendritic Growth with Humidity by Using an Anisotropic Phase Field Model

Shao,

Chen,

Yang

et al. 2024

Crystal Growth & Design

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To study the growth characteristics of ice crystals under different humidities, the equation for the subcooling coefficient is fitted, and a phase-field method model based on the heat and mass transfer equation and the energy conservation equation is established. The effects of humidity, dimensionless latent heat, and anisotropic strength on the growth characteristics of ice crystals are analyzed. The results show that the radius of dendrites increases continuously when the relative humidity increases from 55% to 80%, which is 128% under the calculated conditions of this study. With the increase of dimensionless latent heat, the energy required for dendritic crystal crystallization increases and the hindrance of dendritic crystal growth becomes larger. The radius of the dendritic crystals, which increased with humidity, became smaller with increasing K, decreasing by ∼56.6%. The width of the main dendritic crystals decreases continuously with the increase of dimensionless latent heat and decreases with increases in the humidity. With the increase of anisotropic strength, the growth direction of the lateral and main branches becomes more and more anisotropic, and the radius of dendritic protrusions increases as the increase of anisotropic strength increases.

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Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Ice Crystal Dendritic Growth with Humidity by Using an Anisotropic Phase Field Model

Shao,

Chen,

Yang

et al. 2024

Crystal Growth & Design

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Effects of coupling of groove microstructure and mixed wettability on flow boiling heat transfer enhancement of R134a in microchannels

Zhang,

Yue,

et al. 2024

International Communications in Heat and Mass Transfer

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Experimental Investigation of Runback Water Flow Behavior on Aero-Engine Rotating Spinners with Different Wettabilities

Ma,

Lin,

Jin

et al. 2024

Aerospace

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The accumulation of ice on the aero-engine inlet compromises engine safety. Traditional hot air anti-icing systems, which utilize bleed air, require substantial energy, decreasing engine performance and increasing emissions. Superhydrophobic materials have shown potential in reducing energy consumption when combined with these systems. Research indicates that superhydrophobic surfaces on stationary components significantly reduce anti-icing energy consumption by altering runback water flow behavior. However, for rotating aero-engine components, the effectiveness of superhydrophobic surfaces and the influence of surface wettability on runback water flow remain unclear due to centrifugal and Coriolis forces. This study investigates the runback water flow behavior on aero-engine rotating spinner surfaces with varying wettabilities in a straight-flow spray wind tunnel. The results demonstrated that centrifugal force reduces the amount of runback water on the rotating spinner compared to the stationary surface, forming rivulet flows deflected opposite to the direction of rotation. Furthermore, wettability significantly affects the flow characteristics of runback water on rotating surfaces. As the contact angle increases, the liquid water on the rotating spinner transitions from continuous film flow to rivulet and bead-like flows. Notably, the superhydrophobic surface prevents water adhesion, indicating its potential for anti-icing on rotating components. In addition, the interaction between rotational speed and surface wettability enhances the effects, with both increased rotational speed and larger contact angles contributing to higher liquid water flow velocities, promoting the rapid formation and detachment of rivulet and bead-like flows.

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Experimental investigation of surface wettability induced runback water flow and heat transfer behavior

Cited by 3 publications

References 64 publications

Numerical Modeling of Ice Crystal Dendritic Growth with Humidity by Using an Anisotropic Phase Field Model

Numerical Modeling of Ice Crystal Dendritic Growth with Humidity by Using an Anisotropic Phase Field Model

Effects of coupling of groove microstructure and mixed wettability on flow boiling heat transfer enhancement of R134a in microchannels

Experimental Investigation of Runback Water Flow Behavior on Aero-Engine Rotating Spinners with Different Wettabilities

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