Thermal mixing between subchannels: measurement method and applications

SILIN, N.; JUANICO; DELMASTRO, D.F.

NUCLEAR ENGINEERING AND DESIGN

Elsevier Science B.V.

Lugar: New York; Año: 2004 vol. 227 p. 51 - 63

0029-5493

A new thermal tracing technique is presented for the measurement of enthalpy interchange between connected subchannels in one-phase axial flow. The method is simple and versatile, being capable of implementation on compact and non-homogeneous bundles using water as fluid. To present the technique, measurements of turbulent mixing were performed on a triangular array bundle with a relation of pitch to diameter of 1.33, at Reynolds numbers between 10 and 6. For this simple arrangement the precision of the method is discussed showing that accuracies better than 10% can be readily achieved. Measurements are also performed in presence of a mixing vane showing another field were the method can be advantageously applied. For this simple arrangement the precision of the method is discussed showing that accuracies better than 10% can be readily achieved. Measurements are also performed in presence of a mixing vane showing another field were the method can be advantageously applied.