封严腔泄漏流对压气机性能影响的试验研究

吴森林; 赵正; 王文琪; 高杰; 黄宇轩

doi:10.13224/j.cnki.jasp.20230036

封严腔泄漏流对压气机性能影响的试验研究

doi: 10.13224/j.cnki.jasp.20230036

中国航发四川燃气涡轮研究院，四川绵阳 621024

基金项目: 四川省科技计划项目（2022JDRC0013）

详细信息

作者简介:
吴森林（1979-），男，研究员，硕士，主要从事压气机性能评定与试验技术研究。E-mail：40744118@qq.com

中图分类号: V231.3
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出版历程
- 收稿日期: 2023-01-16
- 网络出版日期: 2025-04-04

Experimental investigation of the influence of seal cavity leakage on a compressor performance

Sichuan Gas Turbine Establishment，Aero Engine Corporation of China，Mianyang Sichuan 621024，China

摘要

摘要:
以两台单级压气机为试验对象，分别采用调节压气机进口节流比和封严腔供气压力两种方式，开展了封严腔泄漏流对压气机性能影响的试验研究，获取了封严腔泄漏流对压气机性能影响规律。研究结果表明：随着压气机进口节流比的降低或封严腔压力的增加，封严空气泄漏量逐渐增大，但增幅变化逐渐变得缓慢；随着封严空气泄漏量的增加，压气机出口叶根区域主流压力逐渐降低、叶片尾迹区增大，压气机性能逐渐降低；当试验件存在多封严腔供气时，与前封严腔相比，后封严腔空气泄漏对压气机效率影响较大，且随着转速升高影响程度增大。
- 泄漏量 /
- 压气机 /
- 节流比 /
- 封严腔压 /
- 气动性能
Abstract:
An experimental investigation of the influence of seal cavity leakage on compressor was carried out on two compressors with variable inlet throttle ratio and cavity pressure respectively. The investigation results showed that seal cavity leakage flow rate increased with the decrease of inlet throttle ratio or the increase of cavity pressure. As the seal cavity leakage flow rate increased, the outlet pressure of main flow decreased and the blade wake area expanded near compressor hub, reducing the compressor performance. In a compressor experiment with multiple seal cavities, compared with the front seal cavity, the influence of leakage flow rate at rear seal cavity on compressor efficiency was greater, and the higher rotating speed indicated the greater influence.
- leakage flow rate /
- compressor /
- throttle ratio /
- seal cavity pressure /
- aerodynamic performance

HTML

图 1 试验件封严结构示意图

Figure 1. Schematic diagram of the seal cavity structure of compressor

下载: 全尺寸图片幻灯片

图 2 封严空气泄漏量随篦齿压差变化曲线

Figure 2. Curve of seal cavity leakage flow rate versus pressure difference of cavity

下载: 全尺寸图片幻灯片

图 3 封严空气泄漏量对流量压比特性影响

Figure 3. Influence of the seal cavity leakage flow rate on the compressor ratio characteristics

下载: 全尺寸图片幻灯片

图 4 封严空气泄漏量对效率特性影响

Figure 4. Influence of the seal cavity leakage flow rate on the compressor efficiency characteristics

下载: 全尺寸图片幻灯片

图 5 峰值效率随封严空气泄漏量的变化曲线

Figure 5. Curve of seal cavity leakage flow rate versus peak efficiency

下载: 全尺寸图片幻灯片

图 6 2#试验件叶片表面静压分布

Figure 6. Static pressure on blade of the 2# compressor

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图 7 封严空气泄漏量对出口总压分布影响

Figure 7. Influence of the seal cavity leakage flow rate on the total pressure distribution at the outlet

下载: 全尺寸图片幻灯片

图 8 泄漏量对叶排静压升的影响

Figure 8. Influence of the seal cavity leakage flow rate on the static pressure rise of blades rows

下载: 全尺寸图片幻灯片

表 1 封严篦齿参数

Table 1. Sealing grate parameters

试验件	前齿数	前齿间隙/mm	后齿数	后齿间隙/mm
1#	3	1.0	3	2.0
2#	2	0.96	2	0.82

下载: 导出CSV

表 2 不同封严压差下的泄漏量

Table 2. Leakage under different sealing pressure difference

试验件	n/%	K	Δp/kPa	相对泄漏量/%
1#	95	0.931	p₁=26.7	W₁=0.5
1#	95	0.658	p₁=46.3	W₁=0.6
1#	95	0.660	p₁=46.7	W₁=1.9
1#	95	0.506	p₁=59.1	W₁=2.8
2#	90	0.985	p₁=15.0	W₁=0.8
2#	90	0.985	p₁=31.4	W₁=1.4
2#	90	0.985	p₁=53.9	W₁=2.4
2#	90	0.985	p₂=5.5	W₂=0.2
2#	90	0.985	p₂=51.2	W₂=2.3
2#	90	0.985	p₂=75.6	W₂=3.2
2#	90	0.985	p₂=90.4	W₂=3.6
2#	60	0.995	p₂=17.0	W₂=0.8
2#	60	0.995	p₂=35.9	W₂=2.2
2#	60	0.995	p₂=53.9	W₂=3.7

下载: 导出CSV

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