Numerical simulation study of the mechanism of hydrogen explosion inhibition by fine water mist containing NaOH

Abstract

The effect of NaOH-containing fine water mist on hydrogen explosion flames is investigated utilizing numerical simulations using a multi-step model of the chemical reaction mechanism. The suppression effect of hydrogen explosion fine water mist in different pipes is studied. The chemical agent NaOH is introduced into the water mist, and the inhibition mechanism is studied from a microscopic perspective. The results show that the addition of fine water mist can effectively reduce the flame temperature and that the fine water mist completely evaporates and absorbs heat in the preheating zone. The addition of NaOH can improve the inhibition effect of ultra-fine water mist on hydrogen explosion, which is the result of the joint action of physical inhibition and chemical inhibition. The mole fraction curve shows that NaOH delays the reaction process of hydrogen explosion by trapping high-energy free radicals.