实验流体力学2025，Vol.39Issue(4)：28-35,8.DOI:10.11729/syltlx20240060
基于PIV/PTV的直升机旋翼"沙盲"现象风沙两相流测量
Measurement of brownout two-phase flow induced by hovering helicopter rotor using PIV/PTV
摘要
Abstract
The PIV/PTV two-phase flow measurement is employed to study the"brownout"two-phase flow induced by a near-ground hovering helicopter rotor.The deflection of the rotor tip vortex trajectory and the merging progress of vortex pairs are characterized through Γ2 vortex core identification and modal decomposition.POD results reveal the spatial distribution and frequency characteristics of dominant modes in different wake field regions.The instantaneous particle distributions exhibit wave-like pattern excited by the wake field.Large quantities of particles are identified in the near region of x/R=2-3.Correlation analysis of POD mode coefficients indicates a close relationship between particle entrainment in this region and the transport of large-scale flow structures formed in the wake field.关键词
直升机旋翼/沙盲/两相流/粒子图像/追踪测速技术/本征正交分解Key words
helicopter rotor/brownout/two-phase flow/PIV/PTV/POD分类
数理科学引用本文复制引用
王少飞,潘翀,张卫国,刘亚奎,齐中阳..基于PIV/PTV的直升机旋翼"沙盲"现象风沙两相流测量[J].实验流体力学,2025,39(4):28-35,8.基金项目
中国空气动力研究与发展中心旋翼空气动力学重点实验室研究开放课题项目(RAL202204-2) （RAL202204-2）
浙江省自然基金项目(LY24A020002) （LY24A020002）
