Effect of blended blade tip and winglet on aerodynamic and aeroacoustic performances of a diagonal fan

Chun Zhang; Lucheng Ji; Ling Zhou; Shijun Sun

doi:10.1016/j.ast.2020.105688

Effect of blended blade tip and winglet on aerodynamic and aeroacoustic performances of a diagonal fan

Chun Zhang
, Lucheng Ji
, Ling Zhou^*
, Shijun Sun

^*Corresponding author for this work

School of Aerospace Engineering

Beijing Institute of Technology

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

20 Citations (Scopus)

Abstract

Tip clearance flow significantly influences the aerodynamic and aeroacoustic performances of a fan. Its mechanism and control have remained a hotspot in the field of turbomachinery. In this paper, blended blade tip and winglet (BBTW) technology is proposed based on the combination of blended blade and end wall and winglet technologies, while the flow field and sound field of an original blade and the BBTW-blade of a diagonal fan are numerically simulated. The calculation results show that the BBTW design reduces the pressure difference between the suction surface and the pressure surface in the blade tip area and enhances the necking effect of tip clearance, thus inhibiting tip clearance leakage flow and improving the aerodynamic performance of the diagonal fan. In addition, as BBTW weakens the tip leakage vortex intensity, thereby reducing the sound pressure level of the near-field and the far-field noise.

Original language	English
Article number	105688
Journal	Aerospace Science and Technology
Volume	98
DOIs	https://doi.org/10.1016/j.ast.2020.105688
Publication status	Published - Mar 2020

Keywords

Aeroacoustics
Blended blade tip and winglet
Tip clearance
Tip leakage flow

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10.1016/j.ast.2020.105688

Cite this

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title = "Effect of blended blade tip and winglet on aerodynamic and aeroacoustic performances of a diagonal fan",

abstract = "Tip clearance flow significantly influences the aerodynamic and aeroacoustic performances of a fan. Its mechanism and control have remained a hotspot in the field of turbomachinery. In this paper, blended blade tip and winglet (BBTW) technology is proposed based on the combination of blended blade and end wall and winglet technologies, while the flow field and sound field of an original blade and the BBTW-blade of a diagonal fan are numerically simulated. The calculation results show that the BBTW design reduces the pressure difference between the suction surface and the pressure surface in the blade tip area and enhances the necking effect of tip clearance, thus inhibiting tip clearance leakage flow and improving the aerodynamic performance of the diagonal fan. In addition, as BBTW weakens the tip leakage vortex intensity, thereby reducing the sound pressure level of the near-field and the far-field noise.",

keywords = "Aeroacoustics, Blended blade tip and winglet, Tip clearance, Tip leakage flow",

author = "Chun Zhang and Lucheng Ji and Ling Zhou and Shijun Sun",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Masson SAS",

year = "2020",

month = mar,

doi = "10.1016/j.ast.2020.105688",

language = "English",

volume = "98",

journal = "Aerospace Science and Technology",

issn = "1270-9638",

publisher = "Elsevier Masson s.r.l.",

}

TY - JOUR

T1 - Effect of blended blade tip and winglet on aerodynamic and aeroacoustic performances of a diagonal fan

AU - Zhang, Chun

AU - Ji, Lucheng

AU - Zhou, Ling

AU - Sun, Shijun

PY - 2020/3

Y1 - 2020/3

N2 - Tip clearance flow significantly influences the aerodynamic and aeroacoustic performances of a fan. Its mechanism and control have remained a hotspot in the field of turbomachinery. In this paper, blended blade tip and winglet (BBTW) technology is proposed based on the combination of blended blade and end wall and winglet technologies, while the flow field and sound field of an original blade and the BBTW-blade of a diagonal fan are numerically simulated. The calculation results show that the BBTW design reduces the pressure difference between the suction surface and the pressure surface in the blade tip area and enhances the necking effect of tip clearance, thus inhibiting tip clearance leakage flow and improving the aerodynamic performance of the diagonal fan. In addition, as BBTW weakens the tip leakage vortex intensity, thereby reducing the sound pressure level of the near-field and the far-field noise.

AB - Tip clearance flow significantly influences the aerodynamic and aeroacoustic performances of a fan. Its mechanism and control have remained a hotspot in the field of turbomachinery. In this paper, blended blade tip and winglet (BBTW) technology is proposed based on the combination of blended blade and end wall and winglet technologies, while the flow field and sound field of an original blade and the BBTW-blade of a diagonal fan are numerically simulated. The calculation results show that the BBTW design reduces the pressure difference between the suction surface and the pressure surface in the blade tip area and enhances the necking effect of tip clearance, thus inhibiting tip clearance leakage flow and improving the aerodynamic performance of the diagonal fan. In addition, as BBTW weakens the tip leakage vortex intensity, thereby reducing the sound pressure level of the near-field and the far-field noise.

KW - Aeroacoustics

KW - Blended blade tip and winglet

KW - Tip clearance

KW - Tip leakage flow

UR - https://www.scopus.com/pages/publications/85078229150

U2 - 10.1016/j.ast.2020.105688

DO - 10.1016/j.ast.2020.105688

M3 - Article

AN - SCOPUS:85078229150

SN - 1270-9638

VL - 98

JO - Aerospace Science and Technology

JF - Aerospace Science and Technology

M1 - 105688

ER -

Effect of blended blade tip and winglet on aerodynamic and aeroacoustic performances of a diagonal fan

Abstract

Keywords

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