基于 PIV/PTV 的直升机旋翼“沙盲”现象风沙两相流测量

Shaofei Wang; Chong Pan; Weiguo Zhang; Yakui Liu; Zhongyang Qi

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

Translated title of the contribution: Measurement of brownout two-phase flow induced by hovering helicopter rotor using PIV/PTV

Shaofei Wang, Chong Pan, Weiguo Zhang, Yakui Liu, Zhongyang Qi

Research output: Contribution to journal › Article › peer-review

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.

Translated title of the contribution	Measurement of brownout two-phase flow induced by hovering helicopter rotor using PIV/PTV
Original language	Chinese (Traditional)
Pages (from-to)	28-35
Number of pages	8
Journal	Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics
Volume	39
Issue number	4
DOIs	https://doi.org/10.11729/syltlx20240060
State	Published - Aug 2025
Externally published	Yes

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title = "基于 PIV/PTV 的直升机旋翼“沙盲”现象风沙两相流测量",

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.",

keywords = "brownout, helicopter rotor, PIV/PTV, POD, two-phase flow",

author = "Shaofei Wang and Chong Pan and Weiguo Zhang and Yakui Liu and Zhongyang Qi",

year = "2025",

month = aug,

doi = "10.11729/syltlx20240060",

language = "繁体中文",

volume = "39",

pages = "28--35",

journal = "Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics",

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number = "4",

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TY - JOUR

T1 - 基于 PIV/PTV 的直升机旋翼“沙盲”现象风沙两相流测量

AU - Wang, Shaofei

AU - Pan, Chong

AU - Zhang, Weiguo

AU - Liu, Yakui

AU - Qi, Zhongyang

PY - 2025/8

Y1 - 2025/8

N2 - 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.

AB - 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.

KW - brownout

KW - helicopter rotor

KW - PIV/PTV

KW - POD

KW - two-phase flow

UR - https://www.scopus.com/pages/publications/105016636334

U2 - 10.11729/syltlx20240060

DO - 10.11729/syltlx20240060

M3 - 文章

AN - SCOPUS:105016636334

SN - 1672-9897

VL - 39

SP - 28

EP - 35

JO - Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics

JF - Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics

IS - 4

ER -

基于 PIV/PTV 的直升机旋翼“沙盲”现象风沙两相流测量

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