Next Article in Journal
Charge and Discharge Analyses of a PCM Storage System Integrated in a High-Temperature Solar Receiver
Next Article in Special Issue
An Experimental Study on the Radiation Noise Characteristics of a Centrifugal Pump with Various Working Conditions
Previous Article in Journal
On Hybrid Energy Utilization in Wireless Sensor Networks
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Energies 2017, 10(12), 1945; doi:10.3390/en10121945

Numerical Study on the Acoustic Characteristics of an Axial Fan under Rotating Stall Condition

School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
*
Author to whom correspondence should be addressed.
Received: 23 October 2017 / Revised: 17 November 2017 / Accepted: 20 November 2017 / Published: 23 November 2017
(This article belongs to the Special Issue Engineering Fluid Dynamics 2018)
View Full-Text   |   Download PDF [15940 KB, uploaded 24 November 2017]   |  

Abstract

Axial fan is an important piece of equipment in the thermal power plant that provides enough air for combustion of coal. This paper focuses on the aerodynamic noise characteristics of an axial fan in the development from stall inception to stall cells. The aerodynamic noise characteristic of monitoring region in time and frequency domains was simulated employing the large-eddy simulation (LES), with the addition of throttle setting and the Ffowcs Williams-Hawkings (FW-H) noise model. The numerical results show that, under the design condition, the acoustic pressure presents regular periodicity along with the time. The noise energy is concentrated with high energy of the fundamental frequency and high order harmonics. During the stall inception stage, the acoustic pressure amplitude starts fluctuating and discrete frequencies are increased significantly in the low frequency; among them, there are three obvious discrete frequencies: 27.66 Hz, 46.10 Hz and 64.55 Hz. On the rotating stall condition, the fluctuation of the acoustic pressure level and amplitude are more serious than that mentioned above. During the whole evolution process, the acoustic pressure peak is difficult to keep stable all the time, and a sudden increase of the peak value at the 34.5th revolution corresponds to the relative velocity’s first sudden increase at the time when the valve coefficient is 0.780. View Full-Text
Keywords: axial fan; rotating stall; aerodynamic noise; numerical simulation; noise spectrum axial fan; rotating stall; aerodynamic noise; numerical simulation; noise spectrum
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhang, L.; Yan, C.; He, R.; Li, K.; Zhang, Q. Numerical Study on the Acoustic Characteristics of an Axial Fan under Rotating Stall Condition. Energies 2017, 10, 1945.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top