弹道学报2025，Vol.37Issue(3)：58-66,9.DOI:10.12115/ddxb.2024.12010
小型航空发动机蒸发管雾化特性试验研究
Experimental Study on Atomization Characteristics of Evaporator Tube of Small Aircraft Engine
王利 1朱学剑 1张卓娅 1孙博楠 2刘鑫 2李建平2
作者信息
- 1. 中国航发湖南动力机械研究所,湖南 株洲 412002
- 2. 西北工业大学 动力与能源学院,陕西 西安 710129
- 折叠
摘要
Abstract
To investigate the effect of the geometric parameters of the evaporator tube on its atomization characteristics,various evaporator-tube configurations were designed,and an experimental platform was constructed to test the atomization characteristics of evaporator tube.Atomization characteristic experiments were conducted,and the atomization parameters of the fuel at the evaporator tube outlet were measured by using phase Doppler particle analyzer(PDPA).The experiments were conducted under normal temperature/pressure and heated-wall conditions respectively to simulate the engine's starting and steady operation states,revealing the variation of atomization characteristics in the evaporator tube with geometric parameters.The results demonstrate that increasing both the outlet diameter of evaporator tube and the outlet orifice angle enhances fuel atomization under normal temperature/pressure and heated-wall conditions.As the outlet diameter increases,the atomization breakup effect of the fuel droplets is optimized,resulting in a more uniform distribution and an expanded fuel distribution boundary.When the outlet diameter of evaporator tube is increased by 2 mm,the average droplet-diameter at the measured cross-section of 15 mm axial-distance from the exit decreases by 12.85 μm under normal temperature/pressure conditions and by 10.54 μm under wall-heated conditions,while the standard deviation of droplet size decreases by 58.32%and 30.24%,respectively.Moreover,the drilled nozzle at the evaporator tube outlet significantly enhances atomization.With the increase of nozzle angle,the oil-mist boundary expands,and the droplet size near the boundary decreases,and the TPC increases.When 25° holes are added to the evaporator tube outlet,the average droplet-diameter at the measured cross-section of 5 mm axial-distance from the exit decreases by 19.70 μm under normal temperature/pressure conditions and by 11.03 μm under wall-heated conditions,while the standard deviation of droplet size decreases by 49.65%and 46.36%,respectively.关键词
小型航空发动机/蒸发管/雾化特性/几何构型/油雾分布边界Key words
small aircraft engine/evaporator tube/atomization characteristics/geometric configuration/fuel-mist distribution boundary分类
航空航天引用本文复制引用
王利,朱学剑,张卓娅,孙博楠,刘鑫,李建平..小型航空发动机蒸发管雾化特性试验研究[J].弹道学报,2025,37(3):58-66,9.
