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Year 1998, Volume 25 / Issue 1-3

Pages: 449

Article price - $35.00

Empirical Study on Heat Transfer in Pulse Burner

David Y. S. Lou
Department of Mechanical Engineering, University of Nebraska, Lincoln, NE 68588, USA

J. Chen
Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, USA

In order to predict heat transfer in pulse burner, an analytical solution of fully developed flow in a circle pipe is used to study the effect of pulsation on velocity profiles. The velocity profiles are found flattened in pulsatile flow and this flatness increases with increases in frequency.
Based on the behaviors of flow as affected by the pulsation, a parabolic secondary velocity profile (PSVP) and an empirical turbulent velocity profile (ETVP), are proposed to model the actual flow characteristics. With these proposed velocity profiles, the effects of both frequency and velocity oscillatory amplitude are reflected in the changes of sectional mean velocity. These sectional mean velocities of PSVP and ETVP are then applied to an empirical heat transfer correlation to determine the heat transfer characteristics of pulse burner. The results, which are applicable to burner but can be applied to tail pipes with slight modification of the inlet conditions, show that heat transfer in pulse burner increases with increasing frequency of pulsation and velocity oscillatory amplitude.

pages 123-134

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