【作者】 范煜； 熊文韬； 林龙沅； 罗喜胜；

【Author】 Fan Yu,Xiong Wen-tao,Lin Long-yuan,Luo Xi-sheng (Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China)

【机构】 中国科学技术大学近代力学系；

【摘要】 为探究高超声速喷管中煤油气体凝结、凝结对流场参数的影响以及流场初始参数对凝结影响等规律,使用替代燃料模型消除煤油复杂的热物理性质,基于同质核化和非平衡相变的有限体积法程序ASCE2D发展了用于模拟高超声速喷管中煤油气体凝结的数值程序。数值模拟结果表明,煤油气体通过膨胀在某一特定区域里成核,接着液滴在成核区域后增长:煤油气体的高密度使喷管气体较难膨胀,凝结潜热的释放进一步影响喷管中流场,使流场参数无法达到设计工况:初始煤油气体的体积分数增加使喷管内凝结强度先增大后减小。更多还原

【Abstract】 To explore the law of kerosene gas condensation,impact to flow field parameters and condensation in different initial conditions in hypersonic nozzles,Surrogate Fuel Model is used to eliminate complexity of kerosene’s thermophysical properties and numerical program simulating the kerosene gas condensation in hypersonic nozzles is improved from ASCE2D which including homogeneous nucleation and non-equilibrium phase change model.The results show that nucleation process occurs when gas expands to specific condition and then the nuclei grow behind the nucleation area.It’s found that the gas containing kerosene is difficulty to expand because of high density and condense with latent heat released,both of which influence the flow field.The results also indicate that the intensity of condensation will increases first and then decreases when inflow kerosene gas fraction increases.更多还原