This work reports the results of experimental investigations
carried out on a submerged synthetic jet obtained through the use of a headset
speaker piloted with an appropriate sinusoidal signal at a frequency of 380 Hz.
The purpose of making such a device is to obtain a manufacture that can improve
human comfort, in cases where there is prolonged contact of parts of the human
body with fabric and/or padding such as, for example, in the case of
professional drivers or in the case of patients immobilized in bed for long
periods and who may develop sores from decubitus. The study begins with the
construction of a device that, exploiting the well-known transport properties
of impacting jets, was able to improve local ventilation and the removal of
excess moisture, due to the natural transpiration of human skin in people
forced to assume the same position for prolonged periods such as professional
drivers; bedridden patients; etc. It is essentially imposed upon subjects to
have portions of their own bodies in contact with materials and coverings that
obstruct typical skin transpiration conditions. The structure of the synthetic
jets was studied in advance of the experimental activity, which subsequently
involved building a sponge mat with 80 separate jets. Semi-empirical tests were
conducted on this sponge mat to see how well distilled water could remove
moisture from a cloth.
The experimental investigations were first carried out using
the PIV technique, and, subsequently, the synthetic jet was visualized using
the Background-Oriented Schlieren (BOS) technique which allowed to test the
presence of the jets, installed directly on the mattress, in a relatively
simple and fast way, requiring a very simplified set-up. The first series of
empirical tests were carried out to verify the ability to remove moisture from
a fabric, previously soaked in distilled water, exposed to the action of the
synthetic jets made. The results of these latest tests, although encouraging,
require further analyzes to be carried out quantitative information, like the
moisture evaporation rate, under controlled environmental humidity and
temperature.
Author(s) Details
M. Faruoli
Scuola di Ingegneria, Università degli Studi della
Basilicata, Viale Ateneo Lucano 10, 85100 Potenza, Italy.
G. Abbruzzese
Scuola di Ingegneria, Università degli Studi della
Basilicata, Viale Ateneo Lucano 10, 85100 Potenza, Italy.
R. M. Di Tommaso
Scuola di Ingegneria, Università degli Studi della
Basilicata, Viale Ateneo Lucano 10, 85100 Potenza, Italy.
E. Nino
Scuola di Ingegneria, Università degli Studi della
Basilicata, Viale Ateneo Lucano 10, 85100 Potenza, Italy.
Please see the link:- https://doi.org/10.9734/bpi/strufp/v8/1104
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