Dissertation > Excellent graduate degree dissertation topics show

Predict and Study on the Aerodynamic Noise of Semi-open Axial Fan of Air Conditioner Outdoor Unit

Author: XuYuFeng
Tutor: ZhouShaoPing
School: East China University of Science and Technology
Course: Fluid Machinery and Engineering
Keywords: semi-open axial fan CFD tip vortex aerodynamic noise
CLC: TH432.1
Type: Master's thesis
Year: 2012
Downloads: 111
Quote: 0
Read: Download Dissertation

Abstract


In order to reduce noise and improve the aerodynamic performance of air conditioner outdoor unit, study on aeroacoustics and flow characteristics of semi-open low pressure axial flow has become one of research focus. In this paper, semi-open axial flow fan with shroud, which is included in outdoor units of commercial air conditioner is investigated. The three-dimensional turbulent flow field of the axial flow fan with uniform inflow is analyzed by CFD simulation, especially the formation and development process of tip vortex and the flow field interference of parallel axial fan are studied. Then a hybrid method coupling near-field CFD calculation plus the application of an integral nonhomogeneous FW-H function for the far-field is adopted to predict the sound pressure level and the noise spectrum for both single and parallel axial fans. The distribution of sound source, the pressure pulsation at sound source and the characteristics of noise spectrum with different surfaces as sound source are discussed, and the impact on aeroacoustics under the condition that parallel fans with different speed and different blade numbers have been researched. This paper provided the theoretical foundation for optimization design, reducing noise and improving the aeroacoustics of the semi-open low pressure axial fan.

Related Dissertations

  1. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  2. Physically Based Real-Time Fluid Simulation Technique,TP391.41
  3. Axial fan blade vibration non-contact measurement,TD441.2
  4. Based on Pro/E Reconstruct Sprinkler Structure and Investigations on Internal Flow Characteristic of the Sprinkler by Numerical Simulation and Experiment Methods,TP391.72
  5. Numerical Simulation and Optimal Design of Longitudinal Roadheader’s External Spray,TD714.4
  6. Study of the Inner Flow of Vortex Stage and the Vibrancy of Rotor System in High Vacuum Dry Pump,TH314
  7. Optimization Design and Numerical Simulation of Axial-Flow Fans,TH432.1
  8. CFX Simulation of Mixing Effect in Oxygen Mixer of the Vinyl Acetate Synthesizing Plant,TQ225.13
  9. Numerical Simulation Study on the Process of Electrospinning and Experimental Verification,TQ340.6
  10. Design and Optimation for Cross Flow Fan in Air-conditioning,TH43
  11. CFD Simulation of Liquid Flow Field on Commercial-scaled Double-Pass CTST Tray,TQ053.5
  12. Study on O-SEPA Classifier’s Structure and Its Fluid Field Characteristics,TQ051.9
  13. Weak semi - open sets in L-Fuzzy topological spaces and some of its properties of,O189.11
  14. Numerical Simulation and Experimental Study on Gas-Liquid Mixing Process for Xanthan Gum System,TQ027
  15. Numerical Simulation and Experimental Study on Gas-liquid Mass Transfer in Minichannel,TQ021.4
  16. Investigation of Mass Transfer Behavior of Sieve Tray Extraction Column with Different Down Comer Structure by CFD Method,TQ053.5
  17. Study of the Fluid Dynamical Performances in Pipes System of Pressure Swing Absorption,TQ021.1
  18. Two-phase Flow CFD Simulations of Bubbling Crystallization Tube,TQ021.1
  19. Study on Transport Phenomena About Gas-Liquid Co-current Flow in Structured Packing Column,TQ021.1
  20. Numerical Simulation on Flow in Airlift Bioreactor,TQ019
  21. Study on Risk of Runaway Reactions Based on CFD Technique,TQ086

CLC: > Industrial Technology > Machinery and Instrument Industry > Gas compression and transportation machinery > Fan > Centrifugal ( radial flow ) > Axial
© 2012 www.DissertationTopic.Net  Mobile