Results 251 to 260 of about 3,560,028 (306)

Pressure Losses in Flexible Ducts

American Industrial Hygiene Association Journal, 1971
A brief study of pressure loss in flexible ducts was undertaken to provide a suitable basis for judging the adequacy of presently published data provided by the duct manufacturers, and to evaluate the need for further research on the subject. For the 2 1/2-, 4-, and 6-inch-diameter brand A ducts tested, losses measured in the laboratory in perfectly ...
openaire   +2 more sources

Pressure loss in constriction microchannels

Journal of Microelectromechanical Systems, 2002
Constriction devices contain elements inserted into the fluid stream, which change the local streamwise flow area. One such element is the orifice-like obstruction with sharp corners, a back-to-back abrupt contraction and expansion, which could trigger flow separation.
Lee, WY, Wong, M., Zohar, Y.
openaire   +2 more sources

Reducing avoidable pressure losses

World Pumps, 2011
Industrial plants frequently employ oversized pumps out of caution. Pressure losses, and consequently energy consumption, may thus be unnecessarily high. Dr Walter Schicketanz explains in detail how such avoidable pressure drops can be determined both theoretically and in the field, as well as examining how to reduce them.
openaire   +1 more source

Tire Pressure Loss and Intracarcass Pressure Modeling

Tire Science and Technology, 1992
Abstract The inflation pressure loss and carcass pressure build‐up (intracarcass pressure or ICP) of tubeless tires can be predicted with a simple theoretical model. Tire construction and relative air permeabilities of the main tire components are significant factors in the pressure loss and ICP.
openaire   +1 more source

Pressure Losses in Customer's Services

Journal AWWA, 1932
During the past year more attention has been given the matter of pressure losses in customer's services by the Indianapolis Water Company than in the preceding years. Local progress and developments account for this increased consideration. With the completion of a city wide meterization program at the end of 1931 the natural tendency is to lend as ...
H. W. Niemeyer, J. A. Bruhn
openaire   +1 more source

Calculation of pressure losses during pneumatic transport

NOVYE OGNEUPORY (NEW REFRACTORIES), 2020
A method for calculating pressure losses during pneumatic transport is considered with the aim of choosing the most favorable operating mode, which allows to reduce the consumption of compressed air. It has been established that the generally accepted formulas for calculating pressure losses along the path, calculated as the sum of the pressure losses ...
S. F. Shishkin, A. S. Shishkin, V. B. Ponomarev   +2 more
openaire   +1 more source

Pressure Losses in Rectangular Elbows

Journal of Fluids Engineering, 1936
Abstract The authors present data on pressure losses in rectangular elbows as affected by (a) the radius ratios of the elbows, (b) the aspect ratios of the elbows, (c) angle of the bend, (d) the elbow size, (e) velocity of flow, (f) splitters in the elbows, and (g) compound elbows. In general, data are given (1) for the elbow situated in
R. D. Madison, J. R. Parker
openaire   +1 more source

Pressure losses in grooved channels

Journal of Fluid Mechanics, 2013
AbstractThe effects of small-amplitude, two-dimensional grooves on pressure losses in a laminar channel flow have been analysed. Grooves with an arbitrary shape and an arbitrary orientation with respect to the flow direction have been considered. It has been demonstrated that losses can be expressed as a superposition of two parts, one associated with ...
Mohammadi, A., Floryan, J. M.
openaire   +2 more sources

Pressure losses across gravel packs

Journal of Petroleum Science and Engineering, 1991
Abstract An analytical solution is presented for laminar flow across a gravel pack. THe solution was obtained by solving the three-dimensional (3-D) diffusivity equation. This solution describes the divergent flow in the gravel-packed annulus between screen and casing. The solution is in the form of an infinite Fourier-Bessel series.
Turhan Yildiz, Julius P. Langlinais
openaire   +1 more source

Noise-induced hearing loss and blood pressure

International Archives of Occupational and Environmental Health, 1979
A sample of 188 male and 92 female engineering industry workers was investigated. Pure-tone audiometric measurements were used as an estimator of prolonged noise exposure. Using the air conductance thresholds at frequencies of 3,4 and 6 kHz, subjects were classified into three hearing classes. Their systolic (SBP) and diastolic blood pressure (DBP) was
O, Manninen, S, Aro
openaire   +2 more sources