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Numerical Modeling of Turbine Flow Meter and Improving its Performance Using CFD

Dadkhah, Amir Hossein | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57939 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Karimi, Mohammad Sadegh
  7. Abstract:
  8. Studying the performance of flow meters is of great importance in order to improve their quality. In this study, we are looking for an optimal design for a turbine flow meter in which the measurement accuracy, pressure drop and response speed indices are improved. For this purpose, a turbine flow meter with a diameter of 2 inches has been selected and its performance has been numerically modeled using computational fluid dynamics in a steady and transient state. By modeling the steady state, the measurement accuracy and pressure drop indices are obtained, and by modeling the transient state, the response time of the flow meter is obtained. In order to increase the accuracy of numerical modeling, we have calculated the torque of the bearings, which are of the bearing type, and applied them to the equation of the balance of torques. Then, by optimizing the geometric parameters affecting the performance of the turbine flow meter, such as blade angles, blade length, and their number, we have achieved an optimal design. The results show that after optimization on the propeller geometry, the performance of the flow meter in the steady and transient states has been significantly improved. In the new flow meter, the pressure drop in the performance interval has been reduced by an average of 23% and a response time of 30% compared to the original flow meter. Also, the linear error between the upper and lower bounds of the flow meter has increased from 2.66% to 1.18%
  9. Keywords:
  10. Turbine Flowmeter ; Computational Fluid Dynamics (CFD) ; Design Optimization ; Performance Improvement ; Flow Measurement

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