| HAN Jin-zai 1，2 ， SU Zhuang 1，2.Numerical Simulation and Experimental Verification of Flow Field Characteristicsin High-altitude Ventilation Valve[J].航空发动机,2024,50(3):103-106 |
| Numerical Simulation and Experimental Verification of Flow Field Characteristicsin High-altitude Ventilation Valve |
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| Key Words:ventilation valve bellow clearance ventilation system lubrication system aeroengine |
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| Abstract:In order to accurately grasp the characteristics of high-altitude ventilation valves under high-flow ventilation conditions,
the numerical simulations and analyses were conducted on the flow field characteristics of a high-altitude ventilation valve. Comparative
analyses were conducted on the internal flow fields of the ventilation valve with different bellow clearances, and the pressure drop
characteristic curves of the valve under different inlet mass flow conditions were obtained. Leveraging the opportunity of renovating the
lubricating oil system accessory tester, a combination of small-range and large-range volume flowmeters was used to measure pure air
volume flow. The pressure drop tests of the valve were conducted, and numerical results were compared and verified with test results. The
results show that the numerical results are in good agreement with the test results, the simulation analysis method can be used to predict the
pressure drop characteristics of high-altitude ventilation valves. The valve has similar internal flow field characteristics under different bel?
low clearances, the pressure drop mainly occurred near the bellow clearance area, and the structural improvement near the bellow clear?
ance can effectively reduce the pressure drop. |
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