Dissertation > Excellent graduate degree dissertation topics show

Drag-reduction Design of Hypersonic Vehicles and Numerical Simulation

Author: XuJian
Tutor: WangJiangFeng
School: Nanjing University of Aeronautics and Astronautics
Course: Fluid Mechanics
Keywords: Hypersonic flow Drag- reduction N-S equations Unstructured grids Numerical Simulation
CLC: V211.3
Type: Master's thesis
Year: 2009
Downloads: 190
Quote: 0
Read: Download Dissertation

Abstract


Drag-reducing is an important issue and must be considered and solved in the research and development of hypersonic vehicles. Reduce drag of the hypersonic flight means that aircraft itself can carry more fuel and payload.Numerical simulation for hypersonic blunt of different configurations of the drag-reducing design is utilized to calculate the resistance of different states by using Euler and N-S equations. Especially for two kinds of drag-reducing designs, making a channel-configuration and adding an air-spike before the hypersonic configurations. Only the channel-configuration height and air-spike length and shape are paid attention. These two kinds of drag-reducing design configuration of the drag reduction effect and laws are summed up by analyzing and comparing the Fluent’s calculation results and program calculation results. The relevant laws and conclusions are given after a detailed analysis to the calculation results.Firstly, the finite-volume method based on Jameson cell-centered scheme is applied to solve the two-dimensional Euler equations and N-S equations, and the Explicit Runge-kutta time stepping for the time marching.N-S equations based on Spalat-Allmaras One-Equation turbulence model is employed to simulate turbulent flows. Local time-stepping and implicit residual smoothing are applied to accelerate the solution for problems. Computational results agree well with experimental data. Secondly,the program capacity in this paper is compared with the Fluent software to determine the technical feasibility used in the drag-reducing program analysis. Finally, inviscid unstructured grid for Euler equations and viscous structure grid for N-S equations were generated by using Gridgen. In different states, the resistance of different drag-reducing designs configurations of blunt head hypersonic body shape is calculated by the program in this paper and Fluent software. The relevant laws and conclusions are given after a detailed analysis to the calculation results.

Related Dissertations

  1. Convergence and Stability of Numerical Solution of Stochastic Differential Equations with Piecewise Continuous Arguments,O211.63
  2. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  3. Study on Springback of High-Strength Steel Stamping,TG386
  4. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  5. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  6. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  7. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  8. Research on Data Acquisition and Processing Methods for Weapon Evaluation System,TJ06
  9. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  10. Application of Additives’ Drag Reducing Technology in District Heating System,TU995
  11. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  12. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  13. Numerical Simulation of Biomass Direct Reburning,TK16
  14. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  15. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  16. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  17. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  18. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  19. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  20. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  21. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3

CLC: > Aviation, aerospace > Aviation > Basic theory and experiments > Aerodynamics > Computational Aerodynamics
© 2012 www.DissertationTopic.Net  Mobile