Frequency characteristics of fluctuating pressure on rotor blade in a propeller fan

Choon Man Jang, Masato Furukawa, Masahiro Inoue

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A wavelet transform is introduced to analyze frequency characteristics of the fluctuating pressure on rotor blade in a propeller fan. The fluctuating pressure on the rotor blade is obtained by using the results of a large eddy simulation. The frequencies having high spectral peaks of the fluctuating pressure are determined by taking the time average of the local absolute modulus of the wavelet. The dominant frequency of the real-time pressure selected at the high pressure fluctuation region corresponds well to that of the fluctuating rotor torque and the experimental result of fan noise. It is mainly generated due to the unsteady behavior of the vortical flow, such as the tip vortex and the leading edge separation vortex, in the propeller fan. A frequency in the separation bubble region on the suction surface is higher than that of the dominant frequency caused by the vortical flow.

Original languageEnglish
Pages (from-to)163-172
Number of pages10
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume46
Issue number1
DOIs
Publication statusPublished - Feb 1 2003

Fingerprint

propeller fans
rotor blades
Propellers
Turbomachine blades
Fans
Rotors
Vortex flow
vortices
suction
Large eddy simulation
large eddy simulation
leading edges
fans
wavelet analysis
Wavelet transforms
rotors
torque
bubbles
Torque

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

Frequency characteristics of fluctuating pressure on rotor blade in a propeller fan. / Jang, Choon Man; Furukawa, Masato; Inoue, Masahiro.

In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 46, No. 1, 01.02.2003, p. 163-172.

Research output: Contribution to journalArticle

@article{7294abf347c2402da39466385db167c0,
title = "Frequency characteristics of fluctuating pressure on rotor blade in a propeller fan",
abstract = "A wavelet transform is introduced to analyze frequency characteristics of the fluctuating pressure on rotor blade in a propeller fan. The fluctuating pressure on the rotor blade is obtained by using the results of a large eddy simulation. The frequencies having high spectral peaks of the fluctuating pressure are determined by taking the time average of the local absolute modulus of the wavelet. The dominant frequency of the real-time pressure selected at the high pressure fluctuation region corresponds well to that of the fluctuating rotor torque and the experimental result of fan noise. It is mainly generated due to the unsteady behavior of the vortical flow, such as the tip vortex and the leading edge separation vortex, in the propeller fan. A frequency in the separation bubble region on the suction surface is higher than that of the dominant frequency caused by the vortical flow.",
author = "Jang, {Choon Man} and Masato Furukawa and Masahiro Inoue",
year = "2003",
month = "2",
day = "1",
doi = "10.1299/jsmeb.46.163",
language = "English",
volume = "46",
pages = "163--172",
journal = "JSME International Journal, Series B: Fluids and Thermal Engineering",
issn = "0914-8817",
number = "1",

}

TY - JOUR

T1 - Frequency characteristics of fluctuating pressure on rotor blade in a propeller fan

AU - Jang, Choon Man

AU - Furukawa, Masato

AU - Inoue, Masahiro

PY - 2003/2/1

Y1 - 2003/2/1

N2 - A wavelet transform is introduced to analyze frequency characteristics of the fluctuating pressure on rotor blade in a propeller fan. The fluctuating pressure on the rotor blade is obtained by using the results of a large eddy simulation. The frequencies having high spectral peaks of the fluctuating pressure are determined by taking the time average of the local absolute modulus of the wavelet. The dominant frequency of the real-time pressure selected at the high pressure fluctuation region corresponds well to that of the fluctuating rotor torque and the experimental result of fan noise. It is mainly generated due to the unsteady behavior of the vortical flow, such as the tip vortex and the leading edge separation vortex, in the propeller fan. A frequency in the separation bubble region on the suction surface is higher than that of the dominant frequency caused by the vortical flow.

AB - A wavelet transform is introduced to analyze frequency characteristics of the fluctuating pressure on rotor blade in a propeller fan. The fluctuating pressure on the rotor blade is obtained by using the results of a large eddy simulation. The frequencies having high spectral peaks of the fluctuating pressure are determined by taking the time average of the local absolute modulus of the wavelet. The dominant frequency of the real-time pressure selected at the high pressure fluctuation region corresponds well to that of the fluctuating rotor torque and the experimental result of fan noise. It is mainly generated due to the unsteady behavior of the vortical flow, such as the tip vortex and the leading edge separation vortex, in the propeller fan. A frequency in the separation bubble region on the suction surface is higher than that of the dominant frequency caused by the vortical flow.

UR - http://www.scopus.com/inward/record.url?scp=0043193859&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0043193859&partnerID=8YFLogxK

U2 - 10.1299/jsmeb.46.163

DO - 10.1299/jsmeb.46.163

M3 - Article

AN - SCOPUS:0043193859

VL - 46

SP - 163

EP - 172

JO - JSME International Journal, Series B: Fluids and Thermal Engineering

JF - JSME International Journal, Series B: Fluids and Thermal Engineering

SN - 0914-8817

IS - 1

ER -