高低位进气方式对轮缘封严特性影响研究

发布时间：2018-11-02 17:34

【摘要】：为了分析高低位进气方式对燃气入侵现象的影响,采用实验和非稳态的数值模拟方法研究了高低位进气方式对盘腔封严特性的影响,对比分析得到高低位进气方式的掺混流动过程。研究结果表明,高低位进气方式对封严效率的轴向分布有影响,高位进气封严效率沿轴向分布呈上升趋势,低位进气反之;在轮缘封严附近,两种进气方式的封严效率几乎不变;高位进气较低位进气有效阻止了入侵燃气向盘腔内部扩散过程,但没有改变封严环附近的扩散过程。
[Abstract]:In order to analyze the influence of high and low air intake mode on gas invasion, the effect of high and low inlet mode on the sealing characteristics of disk cavity was studied by means of experimental and unsteady numerical simulation. The mixing flow process of high and low air intake mode was obtained by comparison and analysis. The results show that the axial distribution of sealing efficiency is affected by the high and low intake mode, and the seal efficiency of high intake gas increases along the axial direction, and the low inlet air intake is opposite. The sealing efficiency of the two intake modes is almost unchanged in the vicinity of the sealing of the flange, and the high intake and the lower intake effectively prevent the invasion gas from diffusing into the inner cavity of the disk, but the diffusion process near the sealing ring is not changed.
【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;
【分类号】：TK401

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