An Experimental Study on the Phenomena inside the Burning Aviation Kerosene Droplet  

作　　者：HE Ming PIAO Ying 

机构地区：[1]School of Aerospace Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Thermal Science》2021年第6期2202-2213,共12页热科学学报（英文版）

摘　　要：This paper conducted an experimental study of droplet behavior characteristics occurring within a burning aviation kerosene droplet and on the droplet interface.The droplet combustion was performed in a quiescent high-temperature environment by means of the droplet suspension technique.The soot particles were used as tracers to visualize the fluid motion in the droplet.The shape variation of droplet,internal flow pattern in the burning droplet,and instabilities at gas-liquid phase interface were recorded by a high speed camera.The internal fluid flow in the droplet was revealed to be caused by the Marangoni effect,which was generated because of the surface tension gradient induced by the temperature gradient on the droplet surface.The studies showed that the Marangoni effect has a significant impact on the internal flow.The amplitude of the capillary waves on the surface of the droplet was non-uniform and presented the amplitude characteristics of large-small-some.The wavelength of the capillary waves for burning aviation kerosene droplet ranged from 110μm to 120μm.

关 键 词：droplet combustion internal flow Marangoni effect capillary waves 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]