横流风扇内部涡结构演化特性研究
On the Evolution Characteristics of Internal Vortical Structure of the Cross-Flow Fan
DOI: 10.12677/app.2025.1510078, PDF,    科研立项经费支持
作者: 鞠佳原, 高 磊*：四川大学空天科学与工程学院，四川 成都
关键词: 横流风扇；数值模拟；偏心涡；总压比；总效率；Cross-Flow Fan； Numerical Simulation； Eccentric Vortex； Total Pressure； Total Efficiency
摘要: 为了实现机翼的增升减阻，提高飞行器效率，在传统飞行器机翼后缘嵌入横流风扇，横流风扇通过加速低动量流体将其从后缘排出以获得极高的升力和推力。横流风扇叶片的个数和转速会影响气流流量、总压比、总效率等流场参数，不同参数设计的算例涡结构位置和速度、压力分布有所差异，风扇的整体性能跟这些流场数据具有很强相关性。本文针对不同叶片数和转速的横流风扇模型进行了数值模拟研究。研究结果表明，在本文所选的风扇叶片数范围内，18片叶片布局的横流风扇相对其他叶片数的横流风扇具备更高的质量流量系数、总压比和流量系数，因此有最高总效率。另一方面，风扇转速的增加会使所有叶片数工况的总压比均得到提升。叶片数18和24的算例在增大转速过程中流量系数也随之提升。除了叶片数最少的情况，风扇的总效率随转速的增加而增加，但是在转速超过3000 rpm时不会再有进一步增加。
Abstract: In order to achieve wing lift and drag reduction, and improve aircraft efficiency, a cross-flow fan is embedded at the trailing edge of a traditional aircraft wing. The cross-flow fan accelerates low-momentum fluid and exhausts it from the trailing edge to obtain extremely high lift and thrust. The number and speed of blades in a cross-flow fan can affect flow field parameters such as airflow rate, total pressure ratio, and total efficiency. The position, velocity, and pressure distribution of vortex structures in different parameter designs vary, and the overall performance of the fan is strongly correlated with these flow field data. This article conducts numerical simulation research on cross-flow fan models with different blade numbers and speeds. The research results indicate that within the selected range of fan blade numbers in this article, the cross-flow fan with 18 blade layout has a higher mass flow coefficient, total pressure ratio, and flow coefficient compared to cross-flow fans with other blade numbers, thus having the highest overall efficiency. On the other hand, an increase in fan speed will result in an increase in the total pressure ratio for all blade count conditions. The flow coefficient of the cases with 18 and 24 blades also increases as the speed increases. Except for the case with the minimum number of blades, the overall efficiency of the fan increases with the increase in speed, but there will be no further increase when the speed exceeds 3000 rpm.
文章引用：鞠佳原, 高磊. 横流风扇内部涡结构演化特性研究 [J]. 应用物理, 2025, 15(10): 741-753. https://doi.org/10.12677/app.2025.1510078

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