Particle trajectories in a helixchanger

C.W.M. Geld, van der, J.J. Voorde, van de, P. Venkateswaran, B.I. Master

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review


A 3D fluorescent PTV technique has been developped to measure particle trajectories in complex geometries. The technique has succesfully been applied in a mock-up of a helically baffled S&T heat exchanger, the Helixchanger, with a typical measuring accuracy of 0,02 mm. Particles with diameter 0,18-0,22 mm, injected at various locations in the wake of a tube (Reynolds numbers 420 and 1400), are found to be gradually accelerated to ca. one thirth of the water velocity outside the wake in 0,2 s. Their motion is slightly wobbling due to flow intermittency. Particles of 2,0 mm, accelerated in 10,3 mls air-flow around a cylinder, have been found to stay in a plane. By comparison with FEM predictions, the apparent gravity, added mass and lift forces have been found to be significant. This analysis is used to generalize the findings in the Helixchanger.
Originele taal-2Engels
TitelHeat transfer 1998 : proceedings of the 11th international heat transfer conference, Seoul
RedacteurenJ.S. Lee
UitgeverijTaylor and Francis Ltd.
ISBN van geprinte versie1-56032-79
StatusGepubliceerd - 1998


Duik in de onderzoeksthema's van 'Particle trajectories in a helixchanger'. Samen vormen ze een unieke vingerafdruk.

Citeer dit