PR状态方程在超临界喷射模型中的应用  

Application of PR Equation of State in Supercritical Jet Model

作　　者：范珍涔 范玮[2] 靳乐[2] 

机构地区：[1]中航工业燃气涡轮研究院,成都610500 [2]西北工业大学动力与能源学院,西安710072

出　　处：《航空发动机》2015年第4期12-17,共6页Aeroengine

基　　金：国家自然科学基金(50976094)资助

摘　　要：针对超临界流体物性的特殊性,对超临界喷射数值模拟方法进行研究。基于PR状态方程建立了考虑超临界流体特点的超临界喷射数值模型,并采用该模型对超临界C10H22喷射到超临界N2环境中的喷射进行了数值模拟。对比研究了采用PR状态方程的真实气体模型和理想气体模型得出的密度、温度、质量分数分布以及超临界喷射长度和喷射扩张角的变化规律和差异性,并与试验数据进行了对比。结果表明:2种模型在物性预测上的差异会造成以上喷射特性模拟结果的巨大差异,理想气体模型模拟结果与试验数据误差很大,利用真实气体模型能够得到与试验数据较为吻合的结果。基于PR状态方程的超临界喷射数值模型准确可靠,可为碳氢燃料的超临界喷射现象提供参考。Aiming at the particularity of supercritical fluid, the numerical simulation method of supercritical jet was studied. The supercritical jet model was established based on the PR equation of state, the particularity of supercritical fluid was considered. The injections of supercritical C10H22 and supercritical N2 were simulated using the model. The comparison of real gas model with ideal gas model was numerically investigated,which including density distribution, temperature distribution, concentration distribution, jet length and jet spreading angle. The results were verified by the experimental data. The results show that the jet characteristics simulating results of two models are significant differential, which is due to the diversity in physical properties estimation. Compared with the ideal gas model, real gas model was more accurately in simulating supercritical jet characteristics. It could be concluded that the supercritical jet model based on PR equation of state is correct and reliable ,which provide a reference for the supercritical jet phenomena investigation of hydrocarbon fuel.

关 键 词：PR状态方程 超临界喷射 数值模拟 碳氢燃料 

分 类 号：V231.21[航空宇航科学与技术—航空宇航推进理论与工程]