Numerical Analysis of the Acoustic Field of a Ducted Axial Fan at Varying Tip Clearances

2019 ◽  
Vol 105 (1) ◽  
pp. 43-55 ◽  
Author(s):  
S. M. Alavi Moghadam ◽  
M. Meinke ◽  
W. Schröder
Keyword(s):  
Numerical Analysis ◽  
Acoustic Field ◽  
Axial Fan

scholarly journals Assessment of Steady and Unsteady Full Annulus Simulations Predictivity for a Low-Speed Axial Fan at Load-Controlled Windmill

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Aurélie Ortolan ◽  
Suk-Kee Courty-Audren ◽  
Nicolas Binder ◽  
Xavier Carbonneau ◽  
Yannick Bousquet ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Velocity Field ◽  
Detailed Analysis ◽  
Added Value ◽  
Classical Approach ◽  
Axial Fan ◽  
Low Speed ◽  
Unsteady Simulation ◽  
Temporal Periodicity

A steady mixing plane approach is compared with the time-averaged solution of an unsteady full annulus calculation for a conventional fan operating at load-controlled windmill. The objective is to assess the added value of a complete unsteady calculation compared with a more classical approach, especially concerning the effect of the spatial and temporal periodicity release in such an unusual operation as windmill. Experiment with global steady measurements and rotor radial characterizations was conducted. Numerical analysis demonstrates that windmilling global performances obtained with the time-averaged solution of the unsteady simulation are not far different from the steady case, especially in the rotor. Some differences arise in the stator, particularly regarding the velocity field. Temporal periodicity release in this row has clearly a significant effect on the flow unsteady response. A detailed analysis highlights that generic patterns of windmilling flows recorded on a steady approach are also reported on the unsteady case.

scholarly journals Numerical analysis of axial fan characteristics

Mechanik ◽  
2018 ◽  
Vol 91 (7) ◽  
pp. 606-608
Author(s):  
Stanisław Wrzesień ◽  
Michał Frant ◽  
Maciej Majcher
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Flow Rate ◽  
Total Pressure ◽  
Volumetric Flow Rate ◽  
Total Efficiency ◽  
Axial Fan ◽  
Axial Fans ◽  
Basic Characteristics

The paper presents an analysis and comparison of basic characteristics of axial fans, both analytically and numerically. Such characteristics are: the characteristics of the total pressure, power and total efficiency as a function of the volumetric flow rate. The presented results showed significant quantitative and qualitative differences in the characteristics obtained by two methods. The usefulness of numerical methods in relation to the results of the initial analytical project was confirmed.

Numerical analysis of the interaction between fluid flow and acoustic field at the mouth-opening of a flue instrument

2013 ◽  
Vol 133 (5) ◽  
pp. 3321-3321
Author(s):  
Takahiro Akamura ◽  
Yuki Nagao ◽  
Takuya Iwasaki ◽  
Ken'ichiro Nakano ◽  
Kin'ya Takahashi ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Numerical Analysis ◽  
Acoustic Field ◽  
Mouth Opening

Numerical Analysis of a New-Style Ultrasonic Linear Array

2011 ◽  
Vol 58-60 ◽  
pp. 1043-1048
Author(s):  
Yong Wang ◽  
Quan Lu Li
Keyword(s):  
Numerical Analysis ◽  
Radiation Field ◽  
Acoustic Field ◽  
Linear Array ◽  
Acoustic Radiation ◽  
Acoustic Lens ◽  
Width Direction

In order to reduce the field of the acoustic radiation and improve the efficiency of energy using, a new-style ultrasonic linear array is present, which base on the special structural of the acoustic field produced by the cylindrical acoustic lens. The new-style linear array is composed of numbers of cylindrical acoustic lens, each lens act as an element distributed in a line along the width direction. Define x-direction is the direction of wave propagate. We have studied the acoustic field theoretically and have analyzed it numerically. Found that acoustic field have a better directivity in y-direction and the radiation field is much smaller than the traditional linear array, at the same time the focus ability is appear in the Z-direction if we control the number of element and the distance of center-to-center spacing of each element. This paper is helpful to the change and development of traditional liner array.

scholarly journals Numerical Analysis of Acoustic Field in a 2-stage Traveling Wave Thermoacoustic Engine Based on DeltaEC

2017 ◽  
Vol 105 ◽  
pp. 4615-4620 ◽  
Author(s):  
Baiman Chen ◽  
Fan Jiao ◽  
Kelvin Ho ◽  
Minlin Yang ◽  
Shicheng Tian ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Acoustic Field ◽  
Traveling Wave ◽  
Thermoacoustic Engine

Analysis of the Acoustic Field of a Ducted Axial Fan

2017 ◽  
Author(s):  
Seyed Mohsen Alavi Moghadam ◽  
Matthias H. Meinke ◽  
Wolfgang Schroeder
Keyword(s):  
Acoustic Field ◽  
Axial Fan

scholarly journals Numerical analysis of the bubble-particle interaction in an acoustic field

2020 ◽  
Vol 1675 ◽  
pp. 012069
Author(s):  
Yu A Pityuk ◽  
M E Burmistrov ◽  
I A Zarafutdinov
Keyword(s):  
Numerical Analysis ◽  
Acoustic Field ◽  
Particle Interaction
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