A vortex shedding model is developed to predict the flow fieldsaround turbine flowmeter blades. This model is used to simulate theflow separation and reattachment in the leading edge areas and thewake flows of the blades. Lewis's inverse blade design method isdeveloped and quite successfully applied to simulate the displacementeffect of the separation bubbles in the leading edge areas.A new method is introduced to apply the Kutta condition inunsteady flows around the blades wi th separation points on a bladesurface or the flow with blade interaction. This method does notrequire a large amount of iterative calculation.A model is built up to predict the turbine flowmeter performancewhen the inlet flow conditions are known. The panel method is appliedto predict the inlet flow conditions for the cases without inletswirl.An experimental study of the flow inside a turbine flowmeter iscarried out using Laser Doppler Anemometry(LDA) to measure thethroughout velocity fields around a flowmeter at different flowratesand with different inlet swirls. A clear picture of the flow field isthus obtained. The measured resul ts are also used to validate thedeveloped turbine flowmeter performance prediction model.The numerical prediction are tested with experimental results. Thetheoretical and experimental data agree with each other very well inthe cases without inlet swirl and reasonably ",ell in other testedcases with inlet swirl.
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