航天器环境工程2026，Vol.43Issue(1)：54-64,11.DOI:10.12126/see.2025106
高温碳氢燃料旋流喷嘴内部流动特性数值分析
Numerical analysis of internal flow characteristics in high-temperature hydrocarbon fuel pressure swirl nozzles
摘要
Abstract
To elucidate the complex phase-change mechanisms within high-temperature hydrocarbon fuel pressure swirl nozzles in aerospace propulsion systems,a non-isothermal numerical simulation framework was established based on an improved Zwart cavitation model.The flow characteristics of the pressure swirl nozzles were systematically investigated over a temperature range of 333-543 K and a pressure differential range of 0.3-3.0 MPa.It was found that the ratio of the Jakob number to the cavitation number(Ja/Ca)serves as an effective dimensionless parameter to delineate three distinct flow regimes:cavitation dominated(Ja/Ca＜0.2),strongly-coupled transition(0.2≤Ja/Ca≤0.5),and flash-boiling dominated(Ja/Ca＞0.5).A critical transition temperature of 460 K was identified.Above this threshold,vapor choking caused a maximum reduction of 76% in the flow coefficient.Increasing the pressure drop not only expanded the low-pressure region but also significantly modulated the competition between cavitation and flash boiling.A critical temperature prediction model based on the Ja/Ca criterion was developed,providing a dimensionless characterization of the coupled thermodynamic and hydrodynamic effects,with a prediction error of less than 5%.This study provides a quantitative basis for the thermal management design and operational boundary definition of high-temperature propulsion systems.关键词
压力旋流喷嘴/非等温数值模拟/碳氢燃料/流场分布Key words
pressure swirl nozzle/non-isothermal simulation/hydrocarbon fuel/flow field distributions分类
航空航天引用本文复制引用
李春玉..高温碳氢燃料旋流喷嘴内部流动特性数值分析[J].航天器环境工程,2026,43(1):54-64,11.基金项目
延吉市固废处理产业园建设项目(编号:21012322) （编号:21012322）
