裙边宽度对平行进气混合扩压器性能影响

发布时间：2018-05-25 22:52

本文选题：平行进气混合扩压器 + 裙边宽度　；参考：《航空动力学报》2016年09期

【摘要】：为了明晰裙边混合器裙边宽度对涡扇发动机加力燃烧室平行进气混合扩压器气动热力性能的影响,采用基于Navier-Stokes(N-S)方程的三维数值模拟方法对不同裙边宽度模型进行了定量研究,得到了流场、流向涡涡量场、热混合效率、总压恢复系数、混合扩压器出口平均速度及速度因数、混合扩压器出口温度均匀度的变化规律.结果表明:裙边宽度在40~130mm之间变化时,在混合扩压器出口截面处,随着裙边宽度的增加,流向涡的影响范围不断增大,促进内外涵道的气流掺混;热混合效率随裙边宽度的增大先增大后减小,总压恢复系数随裙边宽度的增大总体呈线性减小趋势.混合扩压器出口的平均速度及速度因数随裙边宽度的增大呈线性减小趋势,混合扩压器出口的温度均匀度随裙边宽度的增大而增大.
[Abstract]:In order to understand the influence of skirt width on aerodynamic and thermodynamic performance of parallel inlet diffuser of turbofan engine, three dimensional numerical simulation method based on Navier-Stokes-N-S equation was used to quantitatively study the different skirt width models. The flow field, flow vortex field, heat mixing efficiency, total pressure recovery coefficient, average velocity and velocity factor at the outlet of the mixed diffuser and the temperature uniformity at the outlet of the mixed diffuser are obtained. The results show that when the skirt width varies between 40~130mm and the exit section of the mixed diffuser, the influence range of the flow vortex increases with the increase of the skirt width, which promotes the mixing of internal and external ducts. The heat mixing efficiency increases firstly and then decreases with the increase of skirt width, and the total pressure recovery coefficient decreases linearly with the increase of skirt width. The average velocity and velocity factor of the outlet of the mixed diffuser decrease linearly with the increase of the skirt width, and the temperature uniformity of the outlet of the mixed diffuser increases with the increase of the width of the skirt.
【作者单位】：北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室;中国航空工业集团公司中国燃气涡轮研究院;
【分类号】：V235.13

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