Active control of the rotating stall in a radial vaneless diffuser

Norihito Hirose, Tsuyoshi Kanai, Shinnosuke Obi, Ichiro Ariga

Research output: Contribution to journalArticle

Abstract

An active control method for suppression of the rotating stall in a radial vaneless diffuser is proposed. The activator is driven by the prestall pressure fluctuation detected at the shroud wall of the diffuser. In order to extract the characteristic frequency of the prestall signal, an analogue bandpass filter system as well as a digital signal processor (DSP) system based on an auto-regressive model are adopted and the results obtained using the two systems are compared. The latter realizes a real-time response to the varying frequency of the pressure fluctuation of the prestall. It is confirmed that the critical flow rate is decreased by 12% by the DSP method, yielding a further extension of the operation range of the vaneless diffuser as compared to that of the filter system. The phase angle is found to be an important parameter for the optimum operation of the present control system.

Original languageEnglish
Pages (from-to)218-223
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume62
Issue number593
Publication statusPublished - 1996 Jan
Externally publishedYes

Fingerprint

vaneless diffusers
rotating stalls
active control
Digital signal processors
central processing units
Bandpass filters
critical flow
shrouds
time response
diffusers
Flow rate
bandpass filters
Control systems
phase shift
flow velocity
retarding
analogs
filters

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Active control of the rotating stall in a radial vaneless diffuser. / Hirose, Norihito; Kanai, Tsuyoshi; Obi, Shinnosuke; Ariga, Ichiro.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 62, No. 593, 01.1996, p. 218-223.

Research output: Contribution to journalArticle

@article{70792172e0514d579a320febf2c03159,
title = "Active control of the rotating stall in a radial vaneless diffuser",
abstract = "An active control method for suppression of the rotating stall in a radial vaneless diffuser is proposed. The activator is driven by the prestall pressure fluctuation detected at the shroud wall of the diffuser. In order to extract the characteristic frequency of the prestall signal, an analogue bandpass filter system as well as a digital signal processor (DSP) system based on an auto-regressive model are adopted and the results obtained using the two systems are compared. The latter realizes a real-time response to the varying frequency of the pressure fluctuation of the prestall. It is confirmed that the critical flow rate is decreased by 12{\%} by the DSP method, yielding a further extension of the operation range of the vaneless diffuser as compared to that of the filter system. The phase angle is found to be an important parameter for the optimum operation of the present control system.",
author = "Norihito Hirose and Tsuyoshi Kanai and Shinnosuke Obi and Ichiro Ariga",
year = "1996",
month = "1",
language = "English",
volume = "62",
pages = "218--223",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "593",

}

TY - JOUR

T1 - Active control of the rotating stall in a radial vaneless diffuser

AU - Hirose, Norihito

AU - Kanai, Tsuyoshi

AU - Obi, Shinnosuke

AU - Ariga, Ichiro

PY - 1996/1

Y1 - 1996/1

N2 - An active control method for suppression of the rotating stall in a radial vaneless diffuser is proposed. The activator is driven by the prestall pressure fluctuation detected at the shroud wall of the diffuser. In order to extract the characteristic frequency of the prestall signal, an analogue bandpass filter system as well as a digital signal processor (DSP) system based on an auto-regressive model are adopted and the results obtained using the two systems are compared. The latter realizes a real-time response to the varying frequency of the pressure fluctuation of the prestall. It is confirmed that the critical flow rate is decreased by 12% by the DSP method, yielding a further extension of the operation range of the vaneless diffuser as compared to that of the filter system. The phase angle is found to be an important parameter for the optimum operation of the present control system.

AB - An active control method for suppression of the rotating stall in a radial vaneless diffuser is proposed. The activator is driven by the prestall pressure fluctuation detected at the shroud wall of the diffuser. In order to extract the characteristic frequency of the prestall signal, an analogue bandpass filter system as well as a digital signal processor (DSP) system based on an auto-regressive model are adopted and the results obtained using the two systems are compared. The latter realizes a real-time response to the varying frequency of the pressure fluctuation of the prestall. It is confirmed that the critical flow rate is decreased by 12% by the DSP method, yielding a further extension of the operation range of the vaneless diffuser as compared to that of the filter system. The phase angle is found to be an important parameter for the optimum operation of the present control system.

UR - http://www.scopus.com/inward/record.url?scp=0029734550&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029734550&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0029734550

VL - 62

SP - 218

EP - 223

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 593

ER -