LDA Application Methods

1. Front Matter

   Pages i-xv

   PDF

2. Introduction

   • Zhengji Zhang

   Pages 1-9

3. Specifications of Engineering Turbulent Flows

   • Zhengji Zhang

   Pages 11-17

4. LDA Principles and Laser Optics

   • Zhengji Zhang

   Pages 19-40

5. LDA Systems

   • Zhengji Zhang

   Pages 41-45

6. Basic Data Processing Methods in LDA Measurements

   • Zhengji Zhang

   Pages 47-52

7. Linear Transformation of Velocities and Turbulent Stresses

   • Zhengji Zhang

   Pages 53-67

8. Tracer Particles and Particle Motion Equations

   • Zhengji Zhang

   Pages 69-88

9. Zero Correlation Method (ZCM)

   • Zhengji Zhang

   Pages 89-96

10. Dual Measurement Method (DMM)

    • Zhengji Zhang

    Pages 97-111

11. Symmetrical Method of 3D-Velocity Measurements

    • Zhengji Zhang

    Pages 113-116

12. Non-stationary Turbulent Flows

    • Zhengji Zhang

    Pages 117-131

13. Turbulent Flow with Spatial Velocity Gradient

    • Zhengji Zhang

    Pages 133-146

14. Flow Measurements Behind the Plane Window: On-axis

    • Zhengji Zhang

    Pages 147-150

15. Flow Measurements Behind the Plane Window: Off-axis

    • Zhengji Zhang

    Pages 151-189

16. Flow Measurements in Circular Pipes

    • Zhengji Zhang

    Pages 191-217

17. Fringe Distortion Effects

    • Zhengji Zhang

    Pages 219-226

18. Velocity Bias Effects

    • Zhengji Zhang

    Pages 227-241

19. LDA Application Examples

    • Zhengji Zhang

    Pages 243-251

20. Back Matter

    Pages 253-272

    PDF

This technical book considers the application side of LDA techniques. Starting from the basic theories that are crucial for each LDA user, the main subject of the book is focused on diverse application methods. In details, it deals with universal methodical techniques that have been mostly developed in the last 15 years. The book thus gives for the first time an application reference for LDA users in improving the optical conditions and enhancing the measurement accuracies. It also provides the guidelines for simplifying the measurements and correcting measurement errors as well as for clarifying the application limits and extending the application areas of LDA techniques. Beside the treatments of some traditional optical and flow mechanical features influencing the measurement accuracies, the book shows a broad spectrum of LDA application methods in the manner of measuring the flow turbulence, resolving the secondary flow structures, and quantifying the optical aberrations at measurements of internal flows etc.. Thus, it also supports the further developments of both the hard- and software of LDA instrumentations.

• Laser
• Laser-Doppler Anemometry
• anisotropic turbulence
• flow measuremnts
• fluid dynamics
• optical aberrations
• optics
• tracer particles
• turbulence
• turbulent flow
• fluid- and aerodynamics

• Kraftwerke Oberhasli AG (KWO), Innertkirchen, Switzerland

  Zhengji Zhang

Dr. -Ing. Zh. Zhang graduated from the School of Energy & Power Engineering of Xi’an Jiaotong University (PR China) in 1981. He received his PhD at the Institute of Thermo and Fluid Dynamics of Ruhr-University Bochum (Germany). Afterwards he joined Sulzer Markets & Technology Ltd in Winterthur, Switzerland, for experimental research of engineering flows. He is currently an engineer at the Oberhasli Hydroelectric Power Company (KWO), working on hydraulic designs and optimizations of hydraulic machineries. He is the author of the monograph «Freistrahlturbinen» 2009.

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