Dissertation > Excellent graduate degree dissertation topics show

Two Phase Flow Characteristics Based on Semiconductor Laser Sensor Measurement Method

Author: LiuWeiXin
Tutor: JinNingDe
School: Tianjin University
Course: Control Theory and Control Engineering
Keywords: Two-phase flow Laser measurement S transform Box-counting dimension Flow pattern characterization
CLC: TP212.9
Type: Master's thesis
Year: 2008
Downloads: 120
Quote: 1
Read: Download Dissertation

Abstract


In this paper, a semiconductor laser sensor two-phase flow measurement method, which belongs to the optical measurement method , from the fluid conductivity . The ScS plurality of pairs of semiconductor laser sensors to be installed on the same cross-sectional flow characteristics of the fluid in the pipe cross-sectional direction , thereby more detailed investigation and research on the process of change of the fluid flow . Access to the gas-liquid two-phase flow and oil-water two-phase flow experiments to obtain laser measurement signal , using S-transform time-frequency domain analysis method for processing. By first signals of different frequency characteristics of the S-transform method simulation test results show that the the S transform method than the conventional Wigner-Ville -frequency analysis method has better time-frequency aggregation , the actual laser dynamic signal processing results show that , S transform analysis method can effectively distinguish transitional flow , including gas - liquid two-phase flow . In addition , different direction sensor measurement signal to extract the fractal box counting dimension number of changes in the relationship with the gas - phase flow , found that the more complex dynamics characteristics of bubbly flow ; flow patterns from bubbly flow to slug circulation of , its sub -shaped dimension number decreased , indicating that in the the stream transformation process , the dynamic complexity gradually reduced ; slug flow to churn the circulation process , fractal dimension gradually increased , indicating that the dynamic complexity gradually increase . The results show that the semiconductor laser sensor measurement method reveals a better flow characteristics of gas-liquid two-phase flow , a two-phase flow measurement methods .

Related Dissertations

  1. Study of the High Temperature Gas-Liquid Two Phase Flow Rate Proportional Conrtol Valve,V233.2
  2. Study of Effect of High Temperature Seperator on Hydrodynamices in CFB Boiler Furance,TK229.66
  3. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  4. Research on Lapped Transform and Vector Quantization Based Image Coding Algorithm and Applications,TN919.81
  5. Analysis of Spread Spectrum Signals Based on FRFT,TN911.6
  6. The Algorithm of DFT with a Subset of Output Points Based on TS101 and Its Software Implementation,TN911.72
  7. Modulation Pattern Recognition and Parameter Estimation for Ground Wave Radiation Sources,TN957.51
  8. Research on Improvement of DSSS Receiver Based on Phase Domain,TN914.42
  9. Research on Autamatic Music Structrue Analysis,TN912.3
  10. Research on Image Compression and Implementation Using TMS320C6713 Based on SPIHT Algorithm,TP391.41
  11. Feature Extraction, Selection and Combination in Lipreading,TP391.41
  12. Research on Feature Extraction and Classification of Doppler Ultrasonic Blood Flow Signals of Wrist Radial Artery,TP391.41
  13. Analysis of Infrared Spectral Features and Identification of Al-responsive Genes in Small Black Soybean with Aluminum Stress,S529
  14. Research on Recognition of Fabric Weave Pattern Based on Space-Frequency Domain,TS101.923
  15. Research on Identification System of Cashmere and Wool Fiber,TS101.921
  16. Flow Behavior Description of Two-Phase Flow Based on Image Processing Techniques,TP391.41
  17. Characteristics of sensory stimulation evoked,R318.0
  18. Network transmission ROI image coding algorithm,TN919.81
  19. Tianjin transformation of traditional industries strategic research,F426.81
  20. Feature Extraction Technologies Research and Implementation of 3D Models Based on Wavelet Transform,TP391.41
  21. The Research of Application of Ridgelet Transform in the Fusion of Multispectral and Panchromatic Images,TP391.41

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
© 2012 www.DissertationTopic.Net  Mobile