Particle trajectories in a helixchanger

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

Particle trajectories in a helixchanger

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

Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

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.

Original language	English
Title of host publication	Heat transfer 1998 : proceedings of the 11th international heat transfer conference, Seoul
Editors	J.S. Lee
Publisher	Taylor and Francis Ltd.
Pages	149-154
Volume	2
ISBN (Print)	1-56032-79
Publication status	Published - 1998

Cite this

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title = "Particle trajectories in a helixchanger",

abstract = "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.",

author = "\{Geld, van der\}, C.W.M. and \{Voorde, van de\}, J.J. and P. Venkateswaran and B.I. Master",

year = "1998",

language = "English",

isbn = "1-56032-79",

volume = "2",

pages = "149--154",

editor = "J.S. Lee",

booktitle = "Heat transfer 1998 : proceedings of the 11th international heat transfer conference, Seoul",

publisher = "Taylor and Francis Ltd.",

address = "United Kingdom",

}

Particle trajectories in a helixchanger. / Geld, van der, C.W.M.; Voorde, van de, J.J.; Venkateswaran, P. et al.
Heat transfer 1998 : proceedings of the 11th international heat transfer conference, Seoul. ed. / J.S. Lee. Vol. 2 Taylor and Francis Ltd., 1998. p. 149-154.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Particle trajectories in a helixchanger

AU - Geld, van der, C.W.M.

AU - Voorde, van de, J.J.

AU - Venkateswaran, P.

AU - Master, B.I.

PY - 1998

Y1 - 1998

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 1-56032-79

VL - 2

SP - 149

EP - 154

BT - Heat transfer 1998 : proceedings of the 11th international heat transfer conference, Seoul

A2 - Lee, J.S.

PB - Taylor and Francis Ltd.

ER -

Particle trajectories in a helixchanger

Abstract

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