Modeling of Cross Correlation Flow Measurement Systems

In the work presented in this thesis, an original mathematical model of cross correlation flow measurement was developed, based on rigorous analysis of space-time development of a velocity field and vorticity field in turbulent flow. This model describes the effect of flow conditions on ultrasonic cross correlation flow meter output. Laboratory testing was conducted to validate the model. Results of numerical simulations based on the model were in good agreement with laboratory test results. Maximum deviation between results predicted by the model and experimental results was 3.2%, and average deviation was 1.1%. This model provides a basis for uncertainty analysis of cross correlation flow measurement, and its traceability to accepted industry standards, by describing the effect of various flow parameters and meter design parameters on flow measurement. Some of the results of this work are being used in industry today.