Full
Outline
To address the conflicting characteristics between labyrinth seal leakage and friction power consumption，a collaborative optimization study of key parameters was carried out to improve the efficiency of aviation fuel centrifugal pumps.Through theoretical analysis and numerical simulation，the influence mechanisms of key variables such as seal length，number of teeth，and surface roughness on leakage characteristics and power consumption characteristics were revealed.The results show that changing a single parameter leads to a trade‑off between leakage flow rate and friction power consumption，so finding the optimal balance point is necessary.Accordingly，an orthogonal experimental design was adopted to quantify the sensitivity of the coupled effects of key parameters on both leakage and power consumption，and a collaborative optimization method aiming for optimal overall efficiency was established.The obtained optimal seal parameter combination is a seal ring length of 12 mm，a wear ring length of 14 mm，and a roughness Ra of 3.2 μm for both.Experimental verification shows that this optimization scheme effectively improves centrifugal pump performance.In the high‑efficiency operating range （0.8Qd~1.2Qd），the relative efficiency is increased by an average of 5.5%，and overall the relative efficiency improvement exceeds 5%.This study provides theoretical support for the design of high‑performance，low‑power aviation fuel centrifugal pumps，and offers a reference for the application of labyrinth seals in other high‑performance fluid machinery.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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