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Simultaneous measurement of velocity and temperature field in the downstream region of a heated cylinder

Péter Bencs ; University of Miskolc, Department of Fluid and Heat Engineering, Miskolc, Hungary
Szilárd Szabó ; University of Miskolc, Department of Fluid and Heat Engineering, Miskolc, Hungary
Daria Oertel ; University of Magdeburg, Laboratory of Fluid Dynamics and Technical Flows, Magdeburg, Germany

Puni tekst: engleski PDF 728 Kb

str. 7-13

preuzimanja: 832



Simultaneous measurements of the flow velocity
and temperature field for a heated bluff body
present a typical problem. We attempted to carry
out simultaneous measurements using two different
methods, Particle Image Velocimetry (PIV) and
Schlieren. In this experiment, an electrically heated
circular cylinder is placed in a parallel flow, in a
wind tunnel. The experimental tests were carried
out at low Reynolds numbers (Re<200), therefore,
the flow field was approximately two dimensional
(the same flow in every normal plane of the heated
circular cylinder). Two-dimensional flow and the
principle of the Schlieren measurement technique
were used to visualize the temperature field. The Ztype
Schlieren technique was applied to measure
the temperature distribution. Experiments were
carried out for forced convection in a 500x500 mm
cross-section wind tunnel. The measurement
technique and results were shown at different
cylinder surface temperatures. The relationship
between the vortices shed from the heated cylinder
and the heat transfer was determined by relevant
numerical simulations. The main objective of the
present experimental investigation is to find out
whether both velocity and temperature can be
measured at the same time. Results are promising
and indicate that this aim can probably be met with
further refinements of the technique.

Ključne riječi

heated cylinder, schlieren, PIV, experiment, velocity field, temperature field

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