涡轮端壁内部点阵冷却结构的流热耦合研究

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涡轮端壁内部点阵冷却结构的流热耦合研究

更新时间：2025-07-09

- 涡轮端壁内部点阵冷却结构的流热耦合研究
- Issue 12, Pages: 153-162(2022)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院
  2. 陕西省叶轮机械及动力装备工程实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： V231
- Published：2022
- 稿件说明：
移动端阅览
[J]. 2022, (12): 153-162.
DOI：

[J]. 2022, (12): 153-162. DOI：

摘要

为了进一步提高涡轮端壁的综合冷却性能，以某航空发动机高压涡轮静叶端壁内部冷却结构为研究对象，以点阵结构作为端壁的内部冷却结构，不仅能提高端壁的综合冷却有效度，还能在不影响叶栅气动性能的同时，降低内部冷气的压力损失。对不同吹风比下无内部冷却和内部冲击冷却与点阵冷却端壁的耦合传热特性进行研究，对比分析了各端壁的综合冷却有效度和内部的流动换热特性。结果表明：随着吹风比增大，有内部冷却时端壁中上游的综合冷却有效度大幅提升，而端壁下游的综合冷却有效度由外部气膜冷却主导，其最佳吹风比约为3.0

且几乎不受内部冷却结构的影响；与无内部冷却端壁相比，冲击冷却和点阵冷却端壁的综合冷却有效度得到了大幅提升，且点阵冷却端壁的综合冷却有效度和气动性能均要优于冲击冷却端壁。在吹风比为1.5、3.0和7.0时，点阵冷却端壁的面积平均综合冷却有效度比冲击冷却端壁分别高出1.48%、1.10%和1.33%

在总换热量上则分别高出35.8%、34.0%和7.5%

而其表征流动损失的泵功反而比冲击冷却端壁分别低了36.0%、36.9%和35.1%。

Abstract

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references

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