Dissertation > Excellent graduate degree dissertation topics show

Investigation of Combustion and Flow Process in Dual-Cavity Scramjet Combustor

Author: LiuJuan
Tutor: WangZhenGuo
School: National University of Defense Science and Technology
Course: Aeronautical and Astronautical Science and Technology
Keywords: Scramjet Dual - cavity combustor Horizontal jet Flame stability Numerical simulation
CLC: V231.2
Type: Master's thesis
Year: 2007
Downloads: 159
Quote: 1
Read: Download Dissertation

Abstract


In this paper, the scramjet engine with a dual - cavity straight combustion chamber as the research object , focusing on gas fuel mixture under cold flow conditions , flame structure , the cavity resistance and thermal test conditions and comparative analysis of the two - cavity single cavity flow structure , analysis and interpretation of the dual- cavity stable flame enhance the cause of the burning . Under cold flow conditions , the use of numerical simulation to study the flow field in the combustion chamber wall transverse hydrogen jet . The results show that : the hydrogen jet are mainly located in the sprue the concave cavity only a small amount of hydrogen distribution . The cavity is arranged in series , the rear cavity of the fuel penetration little effect , fewer internal fuel with respect to the front cavity ; arranged in parallel , the recessed cavity has little effect on the fuel distribution , the flow channel with respect to the single concave cavity Preparation pressure increased. Under cold flow conditions , the use of numerical simulation of single / dual cavity resistance . The results show that : the resistance of the single cavity increases with increasing depth ; arranged in series when the distance between the two recess cavity resistance has little effect . Hot test conditions , the use of High Speed ??Photography shooting flame structure , focusing on the ignition process of hydrogen ignited kerosene and hydrogen gas , kerosene stable combustion flame structure , the following conclusions flame picture : small fuel equivalent ratio, close to the orifice closer to the rear wall of the cavity and the shear layer region surrounded stable combustion region ; cavity in series in terms of the front cavity is heated and blended fuel , extending the dwell time of the fuel , after the recess provides a stable ignition source , and will re-ignite the combustible gas mixture stream blew maintain stable combustion of the combustion chamber ; parallel in terms of the cavity , the recessed cavity generated shock wave incident on the flame on enhanced partial combustion, the combustion zone can be enhanced relative distribution of the degree of congestion of the combustion chamber , promoting combustion proceeds .

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. Pattern Classification of Combustion Modes in Scramjet,V235
  6. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  7. Study of the High Temperature Gas-Liquid Two Phase Flow Rate Proportional Conrtol Valve,V233.2
  8. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  9. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  10. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  11. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  12. Numerical Simulation of Biomass Direct Reburning,TK16
  13. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  14. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  15. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  16. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  17. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  18. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  19. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  20. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  21. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649

CLC: > Aviation, aerospace > Aviation > Aero-engine ( propulsion system ) > Engine theory > Combustion theory
© 2012 www.DissertationTopic.Net  Mobile