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Investigation of TDLAS Measurements in a Scramjet Engine
Contents
Nomenclature
1 Introduction 1
1.1 Problem Statement
1.2 Scope
1.3 Objectives
1.4 Approach
2 Absorption Spectroscopy
2.1 Properties of the Water Molecule
2.2 Beer-Lambert Law
2.3 The Line Shape Function
2.4 Etalons
3 TDLAS System & Analysis
3.1 TDLAS System
3.2 Data Processing
3.2.1 Raw Signal
3.2.2 Frequency Determination
3.3 Absorption Measurement
3.3.1 Direct Area Integration
3.3.2 Line Fitting
3.4 TDLAS Measurements
3.4.1 Two Line Thermometry
3.4.2 Boltzmann Plot Analysis
3.4.3 Velocity Measurement
3.4.4 Pressure
3.5 Averaging
4 Flat Flame Burner Experiment
4.1 Flat Flame Quadrant Burner
4.2 Thermocouple Measurements
4.2.1 Thermocouple Heat Loss
4.2.2 Multi-Thermocouple Radiation Correction
4.2.3 Methodology
4.3 Thermocouple Results
4.4 TDLAS Setup
4.5 TDLAS Results
5 Research Cell 22
5.1 Isolator Measurements
5.1.1 Experimental Setup
5.1.2 Temperature and Density
5.1.3 Pressure
5.1.4 Velocity
5.2 Combustor Measurements
5.2.1 Experimental Setup
5.2.2 Combustor Results
5.2.3 Signal Quality and Averaging
6 Conclusions
6.1 Summary
6.2 Future Work
A Spectroscopic Constants
B MATLAB Programs
B.1 Shell Script
B.2 Main Program
B.3 Functions
B.3.1 Frequency Determination
B.3.2 Absorbance Calculation
B.3.3 Voigt Fitting
B.3.4 Direct Integration Routine
B.3.5 Area Calculation
B.3.6 Boltzmann Plot CalculationsBài viết liên quan
