Results 251 to 260 of about 1,059,729 (291)

A Comprehensive Model of Fluid Loss in Hydraulic Fracturing

SPE Production & Facilities, 1994
SummaryThis paper presents a comprehensive model of the fluid-loss process that occurs in hydraulic fracturing. The model treats the three flow regions in the leakoff process—the filter cake, the invaded zone and the reservoir zone—as a composite system with a rigorous account of the interface between the last two zones.
Tongchun Yi, J. M. Peden
openaire   +1 more source

Exit Flows and Hydraulic Losses

2016
In order to calculate and enhance the system efficiency of a Pelton turbine, it is essential to know which hydraulic and mechanical losses exist and how they can be estimated and above all successfully reduced. The efficiency of a Pelton turbine has so far been almost exclusively determined through measurements which are either restricted to ...
openaire   +1 more source

Hydraulic Loss Coefficients for Culverts

2012
Traditional culvert applications were designed by determining the minimum culvert size that will pass the specified design flood. In recent years, culvert performance objectives and designs have been expanded to include other considerations such as improving fish and/or terrestrial animal passage and rehabilitating old, deteriorated culverts.
openaire   +1 more source

Analysis of Losses in Hydraulic Turbines

1996
The paper gives a brief discussion on the influence of the different losses in a hydraulic turbine. Of special interest are the friction losses which decreases with Re. This leads to a scale up of the turbine efficiency from model to prototype as expressed in the IEC code according to the theory by prof. Spurk [1].
openaire   +1 more source

Hydraulic Loss of Finite Length Dividing Junctions

Journal of Fluids Engineering, 2017
A general hydraulic loss coefficient correlation for perpendicular, cylindrical, finite length dividing pipe junctions is developed and implemented in a discrete dividing-flow manifold model. Dividing-flow manifolds are used in several technical appliances, e.g., in water and wastewater treatment, swimming pool technology, air engineering, and polymer ...
András Tomor, Gergely Kristóf
openaire   +1 more source

Long-term sealing loss of hydraulic bearings

Russian Engineering Research, 2011
The factors responsible for the loss of sealing of hydraulic bearings in long-term operation are considered. The appearance of cavitation zones in the working fluid of hydraulic bearings and microscopic hydraulic bearings is explained.
B. A. Gordeev, S. N. Okhulkov, A. N. Osmekhin, V. P. Gorskov   +3 more
openaire   +1 more source

Evaluating hydraulic losses in FRKDI bag filters

Chemical and Petroleum Engineering, 1987
Methods for evaluating and reducing the hydraulic resistance and optimizing the power consumption of FRKDI filters were assessed. Hydraulic losses were calculated by determining local hydraulic resistances along the gas flow from the inlet to the outlet of the filter and summing these values.
Yu. I. Gromov, S. V. Obichkin
openaire   +1 more source

Hydraulic Losses - How to Determine - How to Use

SPE Permian Basin Oil Recovery Conference, 1959
Permian Basin Oil Recovery Conference, 7–8 May, Midland, Texas Abstract The factors which affect the treatment cost of an oil or gas well are numerous. These factors, hydraulic hp, treating fluid, well equipment, etc., may be determined and controlled prior to the treatment. An engineering design of a
Robert Wade Brown, Marion A. Whitfield
openaire   +1 more source

Hydraulic losses of a gearbox: CFD analysis and experiments

Tribology International, 2013
Abstract Efficiency is becoming a main concern in the design of power transmissions. It is therefore important, especially during the design phase, to have appropriate models to predict the power losses. For this reason CFD (computational fluid dynamics) simulations were performed in order to understand the influence of geometrical and operating ...
GORLA, CARLO, CONCLI, FRANCO, Karsten Stahl, Bernd Robert Höhn, Klaus Michaelis, Hansjörg Schultheiß, Johann Paul Stemplinger   +6 more
openaire   +2 more sources

Reducing of hydraulic losses at the hydraulic drive under helping loads

Aerospace Systems, 2022
Maxim Chulkov, Aleksey Volkov
openaire   +1 more source