Research on the Behaviors of Nitrogen Droplets Impacting Surfaces with Different Wettabilities

doi:10.7652/xjtuxb202107017

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Research on the Behaviors of Nitrogen Droplets Impacting Surfaces with Different Wettabilities

更新时间：2025-07-09

- Research on the Behaviors of Nitrogen Droplets Impacting Surfaces with Different Wettabilities
- Vol. 55, Issue 7, Pages: 151-157(2021)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202107017
  CLC： TK121
- Online First：10 July 2021，
  
  Published：2021
- 稿件说明：
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Research on the Behaviors of Nitrogen Droplets Impacting Surfaces with Different Wettabilities[J]. 2021, 55(7): 151-157.
DOI：

Research on the Behaviors of Nitrogen Droplets Impacting Surfaces with Different Wettabilities[J]. 2021, 55(7): 151-157. DOI： 10.7652/xjtuxb202107017.

摘要

为了探究氮液滴撞击不同浸润性壁面的行为特性

揭示其与常温工质液滴碰撞特性的差异

采用流体体积法研究了氮液滴以一定速度碰撞壁面接触角分别为30°、90°、120°和150°的壁面的过程

并将其与水滴碰撞特性进行对比。模拟计算结果表明:在接触角为30°和90°的壁面上

氮液滴和水滴均出现振荡行为

并且氮液滴在铺展阶段达到的铺展系数更大

在回缩阶段初始回缩速度不均匀

整体的振荡次数更少

达到稳定状态更缓慢; 在接触角为120°的壁面上

水滴出现振荡

氮液滴则完全反弹; 在接触角为150°的壁面上

相比水滴而言

氮液滴出现反弹行为所需的时间更长。

Abstract

In order to explore the behaviors of nitrogen droplets impacting surfaces with different wettabilities and reveal the differences of the impact performance between nitrogen droplets and normal-temperature working fluid droplets

this paper adopts the volume of fluid method to study the process of nitrogen droplets impacting the walls with contact angles of 30°

90°

120° and 150° at a certain speed

and compares this process with that of water droplets. The results show that on the wall with contact angles of 30° and 90°

both the nitrogen droplets and water droplets exhibit oscillating behavior

but the nitrogen droplets have a larger spreading factor during the spreading stage; the initial retraction speed is uneven in the retraction stage

the overall oscillation frequency is lower and reaches slower to a stable state. On the wall with contact angle of 120°

the water droplets oscillate

but the nitrogen droplets rebound completely; on the wall with contact angle of 150°

it takes longer time for nitrogen droplets to rebound.

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