Abstract:
When visualization measurement techniques,such as particle image velocimetry(PIV) and laser Doppler velocimetry(LDV),are applied in rod bundle experiments,measurement locations are restricted due to blockage and refraction by solid rods.Employing matched index of refraction(MIR) techniques for the high Reynolds number flow in fuel assembly,the MIR method of FEP and water and the MIR method PMMA and sodium iodide solution are chosen and tested.The results show that the flow field behind rods can be achieved by the two MIR methods.