Dissertation > Excellent graduate degree dissertation topics show

Experimental Study on Three-Dimensional Underwater Supersonic Gas Jets

Author: ChenShuai
Tutor: ShiHongHui
School: Zhejiang University of Technology
Course: Fluid Machinery and Engineering
Keywords: Three-dimensional underwater supersonic gas jets Bubble movement Back attack Momentum jet Dimensional analysis
CLC: O358
Type: Master's thesis
Year: 2012
Downloads: 79
Quote: 2
Read: Download Dissertation

Abstract


This thesis studies the three-dimensional underwater supersonic gas jets,then analyses theflow character and instability of gas jets. Through designing an experimental device ofthree-dimensional underwater supersonic gas, I research the underwater supersonic gas jets indifferent condition with laval nozzle of different design Mach number respectively, then showthe evolution process of “back attack” phenomenon and the flow situation in different condition..At last I present a statistical result of the frequency of back attack. I focus on the evolutionprocess of how the “initial bubble” grow and move. The change of “bubble” form shows thecomplex movement of gas water boundary, so I establish the analytical model of “initial bubble”form, then gain some law of bubble movement by using the experimental data. I explain thenon-roundness concept and point out the importance of momentum jet in theoretical analysis andpractical application. In the experimental analysis, we may obtain steady and long momentum jeteasily using laval nozzle of low design Mach number compared with laval nozzle of high designMach number in the same experimental condition. I also research the evolution process oftransitional region of underwater gas jets and point out that the movement of energy exchangeinside transitional region may play an important role in underwater gas jets. Aimed at theconcept of water piercing missile launcher, we acquire the non-dimensional relation about thelength of momentum jet with Froude number and Strouhal number based on the experimentaldata.of two-dimensional submerged vertical supersonic gas jets. The relation curves we acquiredmay be helpful to the water piercing missile launcher.

Related Dissertations

  1. Finite Element Simulation on the Mechanical Properties of the Film/Substrate System in the Process of Nanoindentation,TB383.2
  2. Study on New Safety System Engineering Method,X913
  3. Research of Multi-dimensional Analysis Used in Cultivating and Managing Military Driver,TP391.41
  4. Double Iterative Algorithm of Optimal Control for Unknown Systems Based on Wavelet Neural Networks,O232
  5. Side openings crimping machine structure design optimization and serialization,TM302
  6. The Property Insurance Analysis System Based on OnLine Analytical Process Techenolygy,TP311.13
  7. The Reform and Open Policy 30 Year China Man Track and Field Meet Result Development Change’s Multi-dimensional Analysis and the Forecast Study,G82
  8. The Modelling and Analysis of Fan-shaped Tube in Tube Structural System of Super Tall Buildings,TU973.17
  9. Misconduct in the local government interests - the concept of power - three-dimensional study,D625
  10. A Study on Rater Bias in Rating the NMET Writing Performance,G634.41
  11. Research of Air-Source Heat Pump by Increasing the Outdoor Heat Exchanger Area,TB657.2
  12. Rock Salt Similar Model and Similar Material Study That Consider Creep Property,TD311
  13. Research on the Site Selection of Seawater Desalination Plant in Weifang,P747
  14. Of the \,G212
  15. Micromixing Characteristics and Dimensionless Correlation for the Segregation Index in a Stirred Tank,TQ027.1
  16. Concave curve analysis methods and numerical simulation of three-dimensional slope stability,TU43
  17. Research of Multi-dimensional Analysis Used in Managinging Junior Officers,TP311.13
  18. SPH method for tank sloshing and dimensional analysis,U661
  19. Transmission towers 100m above study of wind load factors,TU311.3
  20. Internal explosion similarity theory and research of the size effect,X932

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