CONTENTS 



INTRODUCTIOiN . . . page 5 



PROCEDURES ... 5 

 Selection ... 5 

 Operation ... 5 



REQUIREMENTS ... 6 



FLOWMETERS ... 7 

 Acoustic ... 7 

 Impeller ■ ■ ■ 10 

 Electromagnetic . . . 15 

 Drag Force . . . 23 



LAGRANGIAN METHOD . . . 38 



Short-4Distance Tracers . . . 40 



MISCELLANEOUS . . . 40 



Savonius Rotor Meters . . . 40 

 Thermo -Anemometer Meters . . . 40 



CONCLUSIONS . . . 41 



RECOMMENDATIONS . . . 41 



REFERENCES ... 42 



ILLUSTRATIONS 



1 Time -difference acoustic meter, one path . . . page 8 



2 Time -difference acoustic meter, two paths . . . 8 



3 Doppler acoustic meter ... 9 



4 Calibration curve. Marine Advisers Inc. ducted meter model B-7C . . . 10 



5 Marine Advisers Inc. ducted meter model B-7C . . ■ 11 



6 Nonlinear distortion, impeller meter . . . 13 



7 Directional response of Marine Advisers Inc. ducted current meter Q-8 . . . 15 



8 Transverse magnetic field configuration, electromagnetic flowmeter . . . 16 



9 Noncosine directional response, linear output example . . . 18 



10 False dc levels due to noncosine angular response . . . 21 



11 Variation of drag coefficient of cylinders ... 25 



12 Variation of inertia coefficient of cylinders ... 26 



13 Example of variation of the inertia and drag coefficients of a cylinder during 



a wave cycle . . . 27 



