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Topic: Hydraulic diameter

Related Topics

Angular diameter

Diameter

Strouhal number

Dimensionless number

	Diameter - Wikipedia, the free encyclopedia
		In geometry, a diameter (Greek words diairo = divide and metro = measure) of a circle is any straight line segment that passes through the center and whose endpoints are on the circular boundary, or, in more modern usage, the length of such a line segment.
		The diameter of a subset of a metric space is the least upper bound of the distances between pairs of points in the subset.
		Diameter is also sometimes called phi (rhymes with pi), although this seems to come from the fact that Ø and ø look like Φ and φ, the letter phi in the Greek alphabet.
	en.wikipedia.org /wiki/Diameter (411 words)

	Apparatus for flushing small-diameter hydraulic pipe systems and the like - Patent 5007444
		An apparatus according to claim 1, wherein a tank is arranged after the valve means, for collecting the flushing liquid, that said collecting tank is connected to a tank of the hydraulic pump means through a pump conduit, and that a filter of the apparatus is arranged in said pump conduit.
		The present invention relates to an apparatus for flushing hydraulic small-diameter pipe systems and the like or a part of such a pipe system, comprising a hydraulic pump means for flushing liquid through the pipe system, and filter means.
		Hydraulic and other similar pipe systems ought to be cleaned internally, before the system is taken into use, to remove contaminating particles remaining after the manufacture and mounting, since these otherwise will later on cause serious disturbances during operation.
	www.freepatentsonline.com /5007444.html (2099 words)

	Quasiturbine-Stirling engine for Hydraulic Quasiturbine Locomotive
		When the hot cylinder is at maximum expansion, the hydraulic pump would pump oil from the cold side cylinder, through a hydraulic thryristor through a second one-way valve (on the hot cylinder) and to the hot side cylinder.
		A hydraulic thyristor is a pressure-controlled one-way hydraulic valve on the cold cylinder, activated by an electrical solenoid.
		The valve operation described for the piston-over hydraulic variant may be used for a direct-air-over-oil layout, to enable precise timing of the hydraulic flow between hot and cold cylinders.
	quasiturbine.promci.qc.ca /QTStirlingHydraulicValentineH.htm (6270 words)

	Calculation, chésy, diameter, hydraulic, oblong, duct, aeraulic, flow, equivalent
		One has for that resort to the concept of hydraulic diameter corresponding to the equivalent diameter or are really used in the case of a circular conduit.
		It is recommended to show much circumspection when one plans to resort to the concept of diameter hydraulic in the case of a laminar flow.
		In the case of use of oblong ducts, the equivalent diameter is obtained by the expression of the ASHRAE:
	www.thermexcel.com /english/ressourc/no_circul.htm (293 words)

	Hydraulic
		This allows the operator to run a hydraulic motor under load and, when the valve is shifted to stop flow to the motor, allows the motor to coast to a stop.
		The inside diameter of the hoses should be chosen such that the needed flow rates can be supplied at fluid speeds within the acceptable ranges listed above.
		Where Q is fluid flow rate in gallons per minute, D is the inside diameter of the hose in inches and V is fluid speed in feet per second.
	www.surpluscenter.com /Hydraulic.htm (514 words)

	GRM Pulp Friction Page 2
		The pressure generated at the master cylinder is equal to the amount of force from the brake pedal output rod divided by the area of the master cylinder piston.
		Given the relationship between master cylinder piston diameter and hydraulic force, it may seem desirable to use the smallest master cylinder possible.
		While the master cylinder used mechanical force on the input side to create hydraulic force on the output side, the caliper does the opposite by using hydraulic force on the input side to create mechanical force on the output side.
	www.scirocco.org /faq/brakes/pulpfriction/pfpage2.html (771 words)

	Hydraulic diameter -- CFD-Wiki, the ultimate free CFD reference
		This is as usefull estimation for setting turbulence boundary conditions for inlets that have fully developed flow.
		The hydraulic diamater is often used when computing the dimensionless Reynolds number for non-circular ducts.
		Hence, for circular pipes the hydraulic diameter is the same as the real diameter of the pipe.
	www.cfd-online.com /Wiki/Hydraulic_diameter (155 words)

	Hydraulic Cylinders – Double Acting Hydraulic Cylinders, Small Hydraulic Cylinders, Custom Hydraulic Cylinders, ... (Site not responding. Last check: 2007-11-06)
		Hydraulic cylinders are linear hydraulic motors that turn the hydrostatic power of a fluid into mechanical power.
		Most hydraulic cylinders are steel hydraulic cylinders, stainless steel hydraulic cylinders or aluminum hydraulic cylinders.
		Hydraulic cylinders are often used as part of a larger hydraulic system including pumps, valves and motors.
	www.iqsdirectory.com /hydraulic-cylinders (1752 words)

	[No title]
		If a borehole is completed with a well casing plus surrounded by a filter pack material, the effective hydraulic diameter is equal to the diameter of the borehole.
		HYDRAULIC CONDUCTIVITY - Refers to the capability of subsurface materials (sand, rock etc.) to allow a fluid (usually water) to flow through it.
		HYDRAULIC GRADIENT - The change in hydraulic head (pressure) per unit distance in a given direction (dimensionless).
	www.water.cc /training/interactive/apa.htm (895 words)

	Frequently Asked Questions (Site not responding. Last check: 2007-11-06)
		Since hydraulic fluids are increasing in cost, and reclamation procedures have improved greatly, more and more hydraulic oil users are reclaiming their own hydraulic fluids.
		The basis for all hydraulic systems is expressed by Pascal’s law which states that the pressure exerted anywhere upon an enclosed liquid is transmitted undiminished, in all directions, to the interior of the container.
		In a basic hydraulic circuit, the force is exerted by a cylinder bore size and the pump pressure.
	www.seal-jet.com /faq.html (4268 words)

	Basic Duct Hydraulics
		In most cases the air in a duct is assumed to be incompressible, an assumption that overlooks the change of air density that occurs as a result of pressure loss and flow in the ductwork.
		The three types of equivalent diameters are "by friction," "by velocity," and "by flow." Dynamic pressure must be calculated using air velocity based on the equivalent by-velocity diameter, and friction loss must be calculated using the equivalent by-friction diameter.
		An excellent way to analyze the hydraulics of a ductwork system is to utilize pressure gradient diagrams to show the pressure-loss characteristics of the system in the design phase [Graham, 1966].
	ateam.lbl.gov /Design-Guide/DGHtm/basicducthydraulics.htm (1554 words)

	Homework 4 CM3110
		The upstream diameter is 0.0762 m and the downstream diameter is 0.2112m.
		The flow is turbulent, the inner diameter of the tube is 4.00 in, and the fluid is water at 68.0
		Calculate the equivalent hydraulic diameter for a rectangular duct of sides a and b.
	www.chem.mtu.edu /~fmorriso/cm310/Homework_4_2003.html (568 words)

	Master of Science Thesis Abstract (Site not responding. Last check: 2007-11-06)
		This work considers smaller flow passages such that the hydraulic diameter could be of the same size as some of the phenomena characteristic lengths such as drop size and bubble size.
		The easiest geometry to consider for the analysis of such small hydraulic diameter geometry would be a narrow non-circular duct.
		The proposed reflood model package for small hydraulic diameter enclosures is then evaluated by a subjective ranking of the completeness of each portion of the model, and its ability to properly model the phenomena as identified in the PIRT.
	home.nycap.rr.com /mjholowach/thesisabst.htm (498 words)

	Hydraulic diameter vs. radius (via CobWeb/3.1 planetlab-2.cs.princeton.edu) (Site not responding. Last check: 2007-11-06)
		Note that the hydraulic diameter only is useful for pipe = flows - for free-surface channel flows it is not relevant.
		My guess is that people working with circular pipes preferred to use a more direct variable for their calculations - namely the (hydraulic) diameter- which turns out to be 4 times larger than the hydraulic diameter for circular pipes.
		Note that the hydraulic diameter only is useful for pipe flows - for free-surface channel flows it is not relevant.
	www.forum-one.org.cob-web.org:8888 /new-2106532-4350.html (1062 words)

	Corbin Lead Wire Extrusion Program
		The purpose of the program is to calculate the length, weight and volume of lead wire that can be extruded, in your choice of diameters, from a given diameter of lead billet, of a given hardness.
		Obviously if the wire and billet diameter are the same, there is no significant oil pressure required to extrude, so that the only force needed is gravity to drop the billet through the die hole.
		The hydraulic cylinder will continue to move at the same rate as it fills with oil at a given pump volume (in gallons per minute or cubic inches per second) regardless of the lead hardness or resistance, unless the resistance approaches the stall force for the system.
	www.corbins.com /dc-lead.htm (1104 words)

	Machine and Alloy Data
		Instrumentation to measure plunger speed and hydraulic pressure during a shot at a high sampling frequency is the most accurate, but even if you do not have access to such equipment, reasonable estimates can be made.
		In this case, a second shaft is attached to the hydraulic piston and it protrudes through the top of the cylinder cap.
		In both cases, the 'Shot Cylinder Diameter' (D) is the diameter of the hydraulic piston.
	www.hotflo.com /dccalc/data1.html (2563 words)

	Analysis of circular bordered pit function I. Angiosperm vessels with homogenous pit membranes -- Sperry and Hacke 91 ...
		diameter of a circle with an area equal to the aperture area.
		diameter, r is the radius of curvature of the membrane deflecting
		is the stretched diameter of the membrane pores.
	www.amjbot.org /cgi/content/full/91/3/369 (7031 words)

	Hydraulic and Equivalent Diameter
		As we could expect the hydraulic diameter in a standard circular tube is 2 times the radius.
		Equivalent diameter is used for estimating pressure loss or head loss in non circular duct or pipes with tables and nomogram made for circular ducts or pipes.
		For circular tubes equivalent diameter is the same as the hydraulic diameter which is the same as the standard diameter.
	www.hvac-toolbox.com /hydraulic-equivalent-diameter-d_458.html (381 words)

	Hydraulic constraints in the functional scaling of trees
		I conducted a literature survey to assess the available information on relationships between size—expressed in terms of diameter and dry biomass—and hydraulic efficiency of woody structures at different scales, from stem segments to whole trees.
		However, the model failed to predict accurately in all species the intraspecific scaling at the branch and whole-tree levels, and consistently overestimated the scaling coefficients.
		The results suggest that ontogenetic changes in tree size during the life cycle of one tree may result in tradeoffs between optimal hydraulic supply to the existing leaf area and maintenance costs of the supporting xylem tissue.
	heronpublishing.com /tree/summaries/volume22/a22-553.html (297 words)

	ROGERS TONG POSITIONER MODEL HTP4-17 - Rogers Oil Tool Services
		4” diameter hydraulic cylinder with chrome plated rod, bolt-on rod end cap, and lock-check/counter balance valve.
		7” diameter hydraulic cylinder with chrome plated rod, bolt-on rod end cap, and lock-check/counter balance valve.
		The standard hydraulic power supply is provided by the Rogers oil tool drill pipe tong hpu.
	www.rogersoiltools.com /htp.html (354 words)

	SANDVIK'S DUPLEX AND SUPERDUPLEX STAINLESS STEELS BECOME INDUSTRY STANDARD FOR DRILLING RISERS (Site not responding. Last check: 2007-11-06)
		Drilling risers contain a package of tubes, comprising a heavy gauge, large diameter carbon steel central tube, through which the drill is lowered to the sea bed, and hydraulic tubes.
		Normally measuring between 38 mm and 127 mm outside diameter, the hydraulic tubes are secured around the central tube.
		As an example, a 316L stainless hydraulic tube with an outside diameter of 2 7/8 inches, operating at 250 bar, would require a wall thickness of 0.376 inches.
	www.newmaterials.com /news/949.asp (410 words)

	The relationship between xylem conduit diameter and cavitation caused by freezing -- Davis et al. 86 (10): 1367 -- ...
		mm diameter were cut from the branches under water in the laboratory.
		is the sum of all the diameters raised to the fourth
		All vessels with diameters equal to or greater than the cavitation diameter were assumed to cavitate during a freeze-thaw cycle at -0.5 MPa.
	www.amjbot.org /cgi/content/full/86/10/1367 (3833 words)

	Experimental Investigation Of Heat Transfer Augmentation In a Concentric Tube Heat Exchanger - Thesis Abstract \| ...
		However, most of the studies are restricted to plain tubes of small hydraulic diameter.
		Science in a large hydraulic diameter pipe hydrostatic pressure is one of the major parameter in addition to Reynolds number the prediction of friction factor using correlations based on Reynolds number only may deviate from reality for large hydraulic diameter pipe.
		Hence there is a need for studying friction factor for large hydraulic diameter systems.
	www.thesisabstracts.com /articles/publish/printer_70.shtml (550 words)

	McElroy University Class Descriptions
		The primary purpose of this session is to develop and refine fusion skills on machines that fuse smaller diameter pipe.
		The primary purpose of this session is to develop and refine fusion skills on machines that fuse mid-range diameter pipe.
		The primary focus of this session is related to the maintenance of hydraulic components and mechanical operation of Large Diameter line of McElroy fusion machines.
	www.mcelroy.com /fusion/training/classes.htm (1482 words)

	CiteULike: Experimental Investigation of Heat Transfer Augmentation in a Concentric Tube Heat Exchanger (Site not responding. Last check: 2007-11-06)
		Science in a large-hydraulic-diameter pipe hydrostatic pressure is one of the major parameter in addition to Reynolds number the prediction of friction factor using correlations based on Reynolds number only may deviate from reality for large hydraulic diameter pipe.
		Suresh Kumar, P. Mahanta and A. Dewan: “Study of Heat Transfer and Pressure Drop in a Large Hydraulic Diameter Annulus”, Proceeding of Seventeenth National Heat and Mass Transfer Conference and Sixth ISHMT/ASME Heat and Mass Transfer Conference, Indira Gandhi Centre for Atomic Research, Kalpakkam India, PP.
		The present results can be applicable for a large hydraulic diameter setup.}, address = {Guwahati, Assam, India.}, author = {Suresh, Kumar P. citeulike-article-id = {131912}, comment = {Publications from the thesis: P.
	www.citeulike.org /user/suresh/article/131912 (1051 words)

	Turbulence length scale -- CFD-Wiki, the ultimate free CFD reference
		In grid-generated turbulence the turbulent length scale is often set to something close to the size of the grid bars.
		In pipe flows the turbulent length scale can be estimated from the hydraulic diameter.
		In fully developed pipe flow the turbulent length scale is 7% of the hydraulic diameter (in the case of a circular pipe the hydraulic diameter is the same as the diameter of the pipe).
	www.cfd-online.com /Wiki/Turbulent_length_scale (268 words)

	Rod Seal - Style DS107 (Site not responding. Last check: 2007-11-06)
		Uses: This seal is best used as a rod seal, but can successfully be used as a piston seal on a hydraulic cylinder.
		An o-ring energizer is included to assist in low pressure sealing for a rod in a hydraulic cylinder or ram.
		This seal is also available up to 60 inches or 1500 MM outside diameter but may require a longer production time.
	www.sealsfast.com /pages/DS/ds107.html (283 words)

	Hydraulic Cylinders, hydraulic cylinder, small hydraulic cylinder, telescopic hydraulic cylinder, telescopic cylinder, ... (Site not responding. Last check: 2007-11-06)
		Hydraulic Cylinders, hydraulic cylinder, small hydraulic cylinder, telescopic hydraulic cylinder, telescopic cylinder, telescopic hydraulic cylinder on FindGuru, formerly ReedLink
		FindGuru, formerly ReedLink, is the premier source for locating Hydraulic Cylinders.
		A hydraulic cylinder is a mechanical device that converts hydraulic oil power into vertical or horizontal motion for pulling and tensioning applications.
	www.findguru.com /ProductHome~Productid~70998.html (174 words)

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