ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)35206
CIS number 81-405
ISSN - Serial title 0002-8894 - American Industrial Hygiene Association Journal
Year 1980
Convention or series no.
Author(s) Garrison R.P., Byers D.H.
Title Static pressure and velocity characteristics of circular nozzles for high velocity/low volume exhaust ventilation.
Bibliographic information Nov. 1980, Vol.41, No.11, p.803-811. Illus. 6 ref.
Abstract These characteristics of nozzles for average face velocities of 50-125m/s were studied. Design variations consisting of 7 profile shapes with an inside diameter of 2.54cm, and 5 plain profiles of 1.27-3.81cm inside diameter were examined. Plain and flanged nozzles showed formation of prounounced vena contracta; flared and rounded nozzles did not. Centerline velocity gradients were affected strongly by variations in nozzle shape, but not in nozzle size and face velocity. Shape and size significantly affected static pressure loss. Equations permitting calculations for nozzle design were determined. See also a related article in section 080, Noise, hearing, vibration.
Descriptors (primary) nozzles; ventilation design; exhaust ventilation
Descriptors (secondary) aerodynamic shape; pressure drop; comparative study; mathematical analysis; airflow measurement
Document type D - Periodical articles
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Compressed gases and pressure vessels
Ventilation