Dissertation > Excellent graduate degree dissertation topics show

Characteristic Research of Vortex Shedding in Vertical Upward Gas-Liquid Two-Phase Flow

Author: HuoChao
Tutor: SunHongJun
School: Tianjin University
Course: Detection Technology and Automation
Keywords: Vortex shedding Gas-liquid two-phase flow Oil-water two - phase flow Numerical Simulation Flow pattern identification HHT
CLC: O359
Type: Master's thesis
Year: 2009
Downloads: 79
Quote: 2
Read: Download Dissertation

Abstract


In real life, the flow around blunt bodies create a vortex is a universal phenomenon . Study vortex shedding in engineering applications, mainly there are two aspects , on the one hand, to prevent the destruction of the vibration of the vortex generating facilities , on the other hand the use of the reflecting piping vibration generated by the vortex flow field state . The vortex flowmeter is the use of this principle . Vortex separation and vortex flowmeter for single-phase fluid has been very full , very little research often involve the gas-liquid / oil-water two-phase flow . But in actual working conditions , the liquid doping gas , the integrated steam condensate droplets , oil and water two-phase mixture of a large number of these have had a significant effect on vortex formation and testing . View of the the fluid symmetry of this article vortex flowmeter vortex shedding in the vertical upward two-phase flow conditions characteristic . For a regular vortex shedding gas-liquid two-phase bubbly flow , there is no rule to vortex shedding gas-liquid two-phase flow and oil-water two-phase flow aspects of the design of the experimental program , completed as follows : 1. Using FLUENT software successfully for three-dimensional liquid phase pipe flow numerical simulation, using the speed distribution to study the vortex structure occurs near the body . Of gas-liquid two-phase bubbly flow study , the use of measurement repeatability as discriminant vortex shedding whether the rule based on derived gas rate of less than 15% when the fluid is stable . Source of uncertainty obtained frequency resolution is a major factor in the uncertainty of vortex flowmeter measurement system of bubbly flow . (4) the use of EMD energy entropy and energy eigenvalues ??complement each other successful gas-liquid two-phase flow pattern identification , distinguish the bubbly flow, slug flow and churn flow . 5 tube oil-water two-phase vortex shedding characteristics , experimental results show that low oil content than the low moisture content measurement error is small by comparison of literature and experimental data , this result with the flow pattern change . Vortex shedding characteristics of the study confirmed that the two-phase flow flow field information, you can lay the foundation for engineering applications .

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. Over-voltage Identification of Transmission Line Based on Hilbert-Huang Transformation,TM866
  21. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13

CLC: > Mathematical sciences and chemical > Mechanics > Fluid Mechanics > Multiphase flow
© 2012 www.DissertationTopic.Net  Mobile