本文選題：二硝酰胺銨(ADN)基液體推進劑 + 空間發(fā)動機　； 參考：《清華大學學報(自然科學版)》2016年10期

【摘要】：二硝酰胺銨(ADN)基液體推進劑是一種綠色環(huán)保的新型推進劑,可在小型空間推進系統(tǒng)中使用。該文通過數(shù)值模擬對ADN基液體推進劑空間發(fā)動機的工作過程進行熱流仿真。使用Euler-Lagrange方法描述推進劑的蒸發(fā)過程,使用多孔介質(zhì)局部非平衡模型描述催化床內(nèi)的傳熱過程,同時考慮氣、液、固三相之間的耦合。使用包含18組分40步反應的ADN-CH3OH簡化反應機理來模擬氣相物質(zhì)的燃燒反應。數(shù)值計算所得發(fā)動機的宏觀運行參數(shù)與實驗值相符。結(jié)果表明:多孔介質(zhì)會將催化床下游和燃燒室內(nèi)反應所釋放熱量傳導到催化床上游,強化推進劑的蒸發(fā)過程。在發(fā)動機內(nèi)部,ADN與CH3OH的反應并不同步。ADN的熱解反應發(fā)生在入口附近,而CH3OH的氧化反應發(fā)生在催化床中下游和燃燒室中。
[Abstract]:The liquid propellants based on ammonium dinitrate (ADN) are a new type of propellants which are green and environmentally friendly and can be used in small space propulsion systems. In this paper, the working process of ADN-based liquid propellant space engine is simulated by numerical simulation. The Euler-Lagrange method is used to describe the evaporation process of propellants, and the local non-equilibrium model of porous media is used to describe the heat transfer process in the catalytic bed. The coupling of gas, liquid and solid three phases is considered at the same time. ADN-CH3OH, which consists of 18 components and 40 steps, is used to simplify the reaction mechanism to simulate the combustion reaction of gaseous substances. The macroscopic operating parameters of the engine obtained by numerical calculation are in agreement with the experimental values. The results show that the heat released from the reaction downstream of the catalytic bed and combustion chamber can be transferred to the upstream of the catalytic bed in porous media to enhance the evaporation process of the propellant. The reaction between ADN and CH3OH does not synchronize with the reaction of CH3OH in the engine. The pyrolysis reaction of ADN occurs near the inlet, while the oxidation of CH3OH takes place in the middle and lower reaches of the catalytic bed and in the combustion chamber.
【作者單位】： 清華大學熱能工程系;北京控制工程研究所;
【基金】：國家自然科學基金青年項目(51506007)
【分類號】：V511

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