间冷回热循环发动机回热器套管结构优化

摘要

以减小回热器管束内流量分配不均匀度和套管质量为目的，利用Isight集成CFD建模和仿真流程，优化间冷回热循环发动机回热器套管结构尺寸，同时还分析了单个及多个套管结构对回热器流量均匀度的影响。结果表明，单套管长度为135 mm时，回热器内不均匀度最低，为0.27422；两套管结构套管长度分别为75 mm和203 mm时，不均匀度最低；三套管结构套管长度分别为23 mm、121 mm和78 mm时，不均匀度最低。前端套管对回热器不均匀度的影响最大，回热器中套管数目越多其不均匀度越大。%In order to reduce the mass flow non-uniformity and the weight of guide vane in recuperator, CFD modeling and simulation integrated by Isight was used to optimize the size of recuperator guide vane of intercooled recuperated aero-engine (IRA), and the influence of single and multiple guide vane struc⁃ture on mass flow non-uniformity was analyzed at the same time. The results show that when the length equals to 135 mm, the mass flow non-uniformity of single guide vane structure is the least; that’s the same for the double guide vane structure with 75 mm and 203 mm long and the three guide vane structure with 23 mm, 121 mm and 78 mm long. The optimization results show that the front guide vane of recupera⁃tor has most influence on mass flow non-uniformity. The more guide vanes in recuperator, the worse non-uniformity will be.