Experimental Study of Autoignition Characteristics of Ethanol-Methylcellulose Gel Droplet

3rd International Conference on Mechanical Engineering and Automation Science

机械制造;无线电电子学

Lee, Donggi^1 ; Won, Jonghan^1 ; Wook Baek, Seung^1

Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon

34141, Korea, Republic of^1

关键词: Auto-ignition;    Autoignition temperature;    Combustion behavior;    Droplet diameters;    Gel propellants;    Methylcellulose;    Micro explosion;    Quartz fibers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/280/1/012034/pdf
DOI  :  10.1088/1757-899X/280/1/012034

来源: IOP

【 摘 要 】

In present study, the autoignition of ethanol based gel propellant, which used methylcellulose as a gellant, has been investigated experimentally. The content of gellant is 9 wt%. The initial droplet diameter range of ethanol gel droplet was 2.5±0.3 mm, and suspended on 0.335 mm quartz fiber. The experiment was conducted at 500, 600, and 700°C under atmospheric pressure, considering that the autoignition temperature of ethanol is 365°C. High speed camera was used for analysis with 100 images per second. General combustion behavior of gel droplet were observed such as swelling, micro explosion, and vapor jetting. It was confirmed that ignition did not occur at 500°C. At 600°C and 700°C, it had short lifetime, and the size of the droplet decreased linearly.