Study of successive-burning characteristics of porous combustible soaked in liquid oxidizer

In this study, we experimentally investigate the successive-burning characteristics of a porous combustible soaked in a liquid oxidizer. Polyethylene foam soaked in hydrogen peroxide is packed in a vertically oriented quartz tube that is considered as a tested combustor in this work. Following forced ignition at the top surface, a successive (steady) burning process occurs. The location of the burning surface is carefully tracked to confirm the successive-burning process. A simple one-dimensional burning model is then developed based on the steady assumption, and the thermal structure and the regression rate under various prescribed conditions are predicted. Separately considering the estimated blow-off limit in the gas-phase by CHEMKIN (PREMIX-code), the range needed to achieve the successive burning is predicted, and its effects on the oxidizer type (hydrogen peroxide and liquid oxygen), fuel properties (e.g. fuel porosity), and operating pressure are discussed. Findings show that the successive burning is widely achievable when hydrogen peroxide is used as the oxidizer, but it is only partially achievable when liquid oxygen is utilized. This fact may support the behavior observed in the past experiment made by Nagata et al. (1997). (c) 2021 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Automated summary

This study experimentally investigates the successive-burning characteristics of a porous combustible soaked in a liquid oxidizer, developing a simple one-dimensional burning model based on the steady assumption to predict thermal structure and regression rate under different conditions. The findings show that successive burning is widely achievable when hydrogen peroxide is used as the oxidizer.