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Topic: Mass flow rate

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	Patents in Class 73/202
		A fluid flow detecting apparatus is disclosed for detecting a characteristic of fluid flowing in a fluid passage.
		A flow rate sensor includes a main conduit, a sensor tube and a bypass tube connecting an upstream portion of the main conduit to a downstream portion of the main conduit such that flow through the main conduit is divided through the sen...
		A heating resistor flow rate measuring instrument, having a heating resistor and a thermally sensitive resistor disposed in a sub-passage of a main passage.
	www.freepatentsonline.com /CCL73-202.html (2325 words)

	Non-intrusive mass flow measuring apparatus and method - Patent 5233868
		Several of such mass flow rate versus normalized temperature parameter curves are used at different input temperatures to express the mass flow rate in terms of a polynomial having certain constant terms and input temperature and the normalized temperature parameter as variables.
		The mass flow rate of fluid flowing through the conduit is then determined using the preferably empirically determined relationship for mass flow in terms of the input temperature and the normalized temperature parameter, and constants determined in the in situ calibration procedure.
		1 is a schematic representation of a mass flow measuring apparatus embodying the principles of the invention.
	www.freepatentsonline.com /5233868.html (4140 words)

	Flow Measurement Laboratory
		However, for the paddle wheel sensor, variables such as the portion of the flow hitting the wheel, drag on the wheel, the alignment of the flow velocity vector relative to the surfaces of the vanes, etc. affect the relationship between flow rate and rotation velocity.
		A mass flow controller is a device that senses mass (not volumetric) flow and then actuates a valve to control the mass flow to a desired rate.
		Flow rate is indicated by a signal that ranges from 0 to 5V for 0 – 20 SLPM at 15V excitation.
	www.mines.edu /academic/courses/eng/EGGN383/mel2/flow (6108 words)

	Fuel injection - Wikipedia, the free encyclopedia
		The desired "fuel flow rate" depends on several conditions, with the engine's "air flow rate" being the fundamental factor.
		To achieve stoichiometry, the air mass flow into the engine is measured and combined with the fact that the stoichiometric air/fuel ratio is 14.64:1 (by weight) for gasoline.
		The rate of the wire's cooling is proportional to the "air mass" flowing across the wire.
	en.wikipedia.org /wiki/Fuel_injection (4599 words)

	Mass Flowmeters
		Mass flow measurement is the basis of most recipe formulations, material balance determinations, and billing and custody transfer operations throughout industry.
		When a fluid is flowing in a pipe and it is subjected to Coriolis acceleration through the mechanical introduction of apparent rotation into the pipe, the amount of deflecting force generated by the Coriolis inertial effect will be a function of the mass flow rate of the fluid.
		The mass flow rate is obtained by calculating the mean velocity and multiplying this by the density and by the cross-sectional area measurement of the duct.
	www.tcomega.com /literature/transactions/volume4/T9904-10-MASS.html (6398 words)

	Flow Rate Unit Conversion - Asknumbers.com
		Mass Flow Rate is the amount of mass passing through a plane the mass flow rate.
		Volume Flow Rate is the volume of fluid that flows past a given cross sectional area per second.
		Molar Flow Rate is the number of moles per unit time that are moving through a cross sectional area.
	www.asknumbers.com /FlowRateConversion.aspx (107 words)

	thrust
		Thrust is produced by the expulsion of a reaction mass, such as the hot gas products of a chemical reaction.
		In an optimum situation (see below), thrust equals the product of the mass expelled from the rocket in unit time (the propellant mass flow rate) and the exhaust velocity (the average actual velocity of the exhaust gases).
		Even when the propellant flow rate and exhaust velocity are constant, so that the thrust is constant, a rocket will accelerate at an increasing rate because the rocket’s overall mass decreases as propellant is used up.
	www.daviddarling.info /encyclopedia/T/thrust.html (383 words)

	General Thrust Equation
		For a moving fluid, the important parameter is the mass flow rate.
		Mass flow rate is the amount of mass moving through a given plane over some amount of time.
		The thrust is then equal to the exit mass flow rate times the exit velocity minus the free stream mass flow rate times the free stream velocity.
	www.grc.nasa.gov /WWW/K-12/airplane/thrsteq.html (1200 words)

	Encyclopedia :: encyclopedia : Rocket fuel (Site not responding. Last check: 2007-11-04)
		The thrust produced is the mass flow rate of the propellants multiplied by their exhaust velocity (relative to the rocket), as specified by Newton's third law of motion.
		Typically, a single-stage rocket might have a mass fraction of 90% propellant, which is a mass ratio of 1/(1-0.9) = 10.
		LOX/hydrocarbon rockets are run only somewhat rich (O/F mass ratio of 3 rather than stoichiometric of 3.4 to 4), because the energy release per unit mass drops off quickly as the mixture ratio deviates from stoichiometric.
	www.hallencyclopedia.com /Rocket_fuel (2793 words)

	Mass Flow Rate
		The conservation of mass is a fundamental concept of physics.
		For flow in a tube, the mass flow rate is a constant.
		This is commonly referred to as flow choking and the details of the physics are given on a page considering compressible mass flow rates.
	www.grc.nasa.gov /WWW/K-12/airplane/mflow.html (548 words)

	Flowmeter manufacturers Flowmeters ultrasonic flow meter magmeter turbine vortex venturi liquid gas steam flow meters
		We are the world's most well known and comprehensive source for flow meter technology, flow transmitters, flow meter manufacturers and suppliers of water meters, chemical flow cells, fuel flowmeters, air flow monitors, gas flow indicators, steam flow measurement and multiphase meter applications.
		The CTT ultrasonic flow meter is a patented method of measuring flow velocity within a small condiuit.
		The ultrasonic flow meter market is one of the fastest growing markets in the world because of the significant advantages seen in the implementation of an accurate transit time flow meter.
	www.flowmeterdirectory.com (1624 words)

	☞ reference - Mass Flow Meter (Site not responding. Last check: 2007-11-04)
		The TGM Thermal Mass Flow Meter is suited for the mass measurement of pure, non-aggressive gases and gas mixtures.
		The GFM mass flow meter, which is ideal for thermal mass flow metering of clean gases, is just one of the competitively priced flow meters available.
		A mass flow meter, also known as inertial flow meter and coriolis flow meter, is a device that...
	www.reference247.info /massflowmeter (645 words)

	AcademicDB - Physics University Essays, Coursework and Dissertations (Site not responding. Last check: 2007-11-04)
		The fluid flowing in the shell is made to flow first in one direction and then in the opposite across the tube bundle by fitting a series of baffles along the length.
		Thermodynamics & Fluid Mechanics - testing a number of orifices of varying shape to calculate the mass flow rate and the coefficients of contraction, velocity and discharge for each orifice.
		This allowed the effect of head on mass flow rate and the orifice coefficients to be determined.
	www.academicdb.com /Physics/more3.html (2557 words)

	Rocket Fuel Encyclopedia Articles @ LaunchBase.org (Launch Base) (Site not responding. Last check: 2007-11-04)
		Rocket fuel is a propellant that reacts with an oxidizing agent to produce thrust in a rocket.
		The maximum velocity that a rocket can attain in the absence of any external forces is primarily a function of its mass ratio and its exhaust velocity.
		The mass ratio is just a way to express what proportion of the rocket is fuel when it starts accelerating.
	www.launchbase.org /encyclopedia/Rocket_fuel (2061 words)

	Mass Flow Rate
		Considering the mass flow rate equation, it appears that for a given area and a fixed density, we could increase the mass flow rate indefinitely by simply increasing the velocity.
		If we have a tube with changing area, like the nozzle shown on the slide, the maximum mass flow rate through the system occurs when the flow is choked at the smallest area.
		By substituting the sonic conditions into the mass flow equation in the box, and doing some algebra, we can relate the Mach number M at any location in the nozzle to the ratio between the area A at that location and the area of the throat A*.
	exploration.grc.nasa.gov /education/rocket/mflchk.html (994 words)

	S.O.S. Mathematics CyberBoard :: View topic - Working out the mass flow rate
		At the inlet the pressure is 100kPa and 27 degrees Celcius, and at the exit the pressure is 95 kPa and temp is 60 degrees Celcius.
		I expect the mass flow rate to be the same at the outlet as at the inlet, but the volumes could differ with the different conditions.
		Volume depends on the mass, temperature and pressure; temperature and pressure are different at the outlet than at the inlet.
	www.sosmath.com /CBB/viewtopic.php?t=6673&start=0&postdays=0&postorder=asc&highlight= (469 words)

	Technical Database - Engine
		Mass airflow is determined by volumetric efficiency VE, and the density (pressure-and-temperature) of the air.
		If you want to work this out in mass flow, a standard cubic foot of air weighs about 0.0765 pounds on a standard 15C day.
		So as a rough guide we can say that multiplying and dividing injector flow rates in the 2 popular flow units by 10 gives us a close approximation conversion.
	engine.firebirdv6.com /formulas.html (1269 words)

	Specified mass-flow rate in an outlet
		Re: Specified mass-flow rate in an outlet - Tom (the other one), Fri, 15 Aug 2003, 2:40 a.m.
		Re: Specified mass-flow rate in an outlet - Jonas Holdeman, Fri, 15 Aug 2003, 8:02 p.m.
		Re: Specified mass-flow rate in an outlet - Biga, Sun, 17 Aug 2003, 7:02 p.m.
	www.cfd-online.com /Forum/main_archive_2003.cgi/read/28003 (172 words)

	Flow rate by mass conversion online.
		You can check some examples of HTML link code for you to cut and paste to your site.
		Feel free to use this button for linking to Flow rate by mass conversion page:
		Flow rate by massmetric conversion, weights and measures, conversion chart page
	www.convert-me.com /en/convert/flow_rate_mass (243 words)

	RAMJET SCRAMJET and PDE - an introduction (Site not responding. Last check: 2007-11-04)
		Drawbacks: a secondary gaseous source (gas generator and cooler) is needed to fluidize the powder, preparation of the loading and control of the flow rate are critical
		Throttling of the gas generator mass flow rate by variation of its throat, that gives a thrust modulation capability to the ramjet.
		To bypass these issues, the solution is to maintain the flow supersonic from the air inlet to the engine exit and to achieve the combustion in the supersonic flow
	www.onera.fr /conferences/ramjet-scramjet-pde (2235 words)

	ISO 4440-1:1994 - Thermoplastics pipes and fittings -- Determination of melt mass-flow rate -- Part 1: Test method
		TC 138 Plastics pipes, fittings and valves for the transport of fluids
		Thermoplastics pipes and fittings -- Determination of melt mass-flow rate -- Part 1: Test method
		Specifies a method for determining the melt mass-flow rate (MFR) of polyolefin materials made into pipes or fittings.
	www.iso.org /iso/CatalogueDetailPage.CatalogueDetail?CSNUMBER=10343&ICS1=23&ICS2=40&ICS3=45&scopelist=&printable=true (126 words)

	Flow rate by volume conversion online.
		How to convert: Flow rate by volume Conversion
		Feel free to use this button for linking to Flow rate by volume conversion page:
		Flow rate by volumemetric conversion, weights and measures, conversion chart page
	www.convert-me.com /en/convert/flow_rate_volume (243 words)

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