前缘狭缝对NACA0015水翼非定常空化的影响  

Influence of Leading Edge Slot on Unsteady Cavitation of NACA0015 Hydrofoil

作　　者：解浩 孟国亮 林小军 李宝栋 XIE Hao;MENG Guoliang;LIN Xiaojun;LI Baodong(School of Mechatronics Engineering,Lanzhou Institute of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州工业学院机电工程学院,甘肃兰州730050

出　　处：《机床与液压》2025年第4期166-170,共5页Machine Tool & Hydraulics

基　　金：2022年度甘肃省高等学校创新基金项目(2022B-246)。

摘　　要：为了深入研究狭缝对翼型前缘片状空化的影响,采用基于Mixture多相流模型及Schnerr-Sauer空化模型的数值模拟方法,对带有不同角度狭缝的翼型进行瞬态高精度数值模拟。通过分析不同插槽角度下的压力、速度以及空泡形态演变,分析插槽对片状空化的抑制机制。结果表明:回射流是导致空泡不稳定的主要原因;狭缝出口处产生射流,并干扰了导致空泡脱落的回射流,从而抑制空泡的生长和脱落;同时,当狭缝夹角大于55°时,翼型后半段起始部位的空泡尺寸显著减小,空化抑制效果更加明显,为水翼空化被动控制提供了新的理论依据和技术支持,对提高水力机械的性能和寿命具有重要意义。To investigate the effect of slits on sheet cavitation at the leading edge of hydrofoils,a high-precision transient numerical simulation was conducted under different slot angles using the Mixture multiphase flow model combined with the Schnerr-Sauer cavitation model.By analyzing pressure distributions,velocity fields and the evolution of cavitation patterns under various slit angles,the suppression mechanism of slit-induced of sheet cavitation was systematically studied.The results indicate that the reverse flow is the primary cause of cavitation instability.The jet generated at the slot outlet effectively interferes with the reverse flow,thereby inhibiting the growth and shedding of cavitation bubbles.Furthermore,when the slot angle exceeds 55°,the size of cavitation bubbles at the initial region of the hydrofoil′s rear section is significantly reduced,demonstrating a more pronounced cavitation suppression effect,which provides new theoretical insights and technical support for the passive control of hydrofoil cavitation,offering significant implications for improving the performance and longevity of hydraulic machinery.

关 键 词：前缘狭缝 云状空化 压力系数分布 

分 类 号：TH137[机械工程—机械制造及自动化]