3 edition of Losses in fountain-effect pumps found in the catalog.
Losses in fountain-effect pumps
1987 by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .
Written in English
|Other titles||Losses in fountain effect pumps.|
|Series||NASA technical memorandum -- 88232.|
|Contributions||Ames Research Center.|
|The Physical Object|
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LOSSES IN FOUNTAIN-EFFECT PUMPS Peter Kittel NASA Ames Research Center, Moffett Field, CAUSA INTRODUCTION Three loss mechanisms in fountain-effect pumps are identified and analyzed.
caloric effect, by reducing the mass transferred per unit heat input. The first loss mechanism of these losses is the result. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.
The Design of Fountain Effect Pumps Article (PDF Available) in Advances in cryogenic engineering July with 85 Reads How we measure 'reads'. The potential for in-flight replenishment of liquid helium for future systems such as the Space Infrared Telescope Facility has triggered vast interests in the fountain effect pumps (FEP’s).
The purpose of this paper is to correlate the FEP data in literatures under Cited by: 7. Perfor Kittel, P. 'Losses in Fountain Effect Pumps'. Proceedings of the Eleventh Interna tional Cryogenic Engineering Conference, Butterworth, Guildford, UK (), p.
6 7 8 Kittel, P. 'Operation Characteristics of Isocaloric Fountain-Effect Pumps'.Cited by: 1. Superfluid helium-4 is the superfluid form of helium-4, an isotope of the element helium.A superfluid is a state of matter in which matter behaves like a fluid with zero substance, which looks like a normal liquid, flows without friction past any surface, which allows it to continue to circulate over obstructions and through pores in containers which hold it, subject.
In the fountain effect, a chamber is constructed which is connected to a reservoir of helium II by a sintered disc through which superfluid helium leaks easily but through which non-superfluid helium cannot pass.
From Figure 4 it can be noticed that, for Ap 19, 21,at UT, the EIA shape has a well-defined double-crest with a trough form , which is expected during daytime because of the equatorial fountain the day of the storm at UT, Figure 4 also shows that the EIA is enhanced by showing a considerably increase of the VTEC in the.
The governing equations of thermomechanical (fountain-effect) pumps are usually given for pumps operating at a constant temperature difference.
These are the thermomechanical and mechanocaloric effects in which the pressure head and mass flow are independent of each by: 6. Fountain effect synonyms, Fountain effect pronunciation, Fountain effect translation, English dictionary definition of Fountain effect. A fluid, such as liquid helium, that flows with little or no friction at temperatures close to absolute zero.
su′perfluid′ity n. n physics a fluid in. Physical limitations of fountain effect pumps* U. Schmidtchent and H.-D. Denner Freie Universit~it Berlin, Fachbereich Physik, Arnimal D Ber FRG Turbulent He II flow behaviour in superfilters of non-cylindrical shape at large temperature gradients was by: 5.
work, fountain-effect pumps are light, self-priming and have no moving parts, assets of long-term reliability in, for example, on- board applications in space [60 ]. At highe r heat load s, they. The market has expanded since the concept of a reservoir, a fountain pump and some form of upper covering, decorative water fall, or fountain effect, has been adapted for individual use.
Almost any style or concept can be created. Fountain Pumps are great for Water features, Ponds, Fountains and Koi ponds.
fountain, natural or artificially conveyed flow of water. In ancient Greece columnar shrines were built over springs and dedicated to deities or nymphs. In ancient Rome fountains. FEP - Fountain Effects Pump. Looking for abbreviations of FEP. It is Fountain Effects Pump. Fountain Effects Pump listed as FEP.
Fountain Effects Pump - How is Fountain Effects Pump abbreviated. Fountain effect; Fountain Effects Pump; Fountain Faerie Quest; fountain fill; Fountain Fort-Carson High School; Fountain Gate Self Storage. The pump rests on the bottom of the pond and the adjustable main pipe with nozzle attachment rises above the water level and when the pump is in operation it pumps water like a fountain and cascades down around the pond keeping the circulation moving, reducing the stagnant waters and keeping mosquito breeding pools down and ensuring that the.
A book "Hydraulic machinery" by Robert Blaine compared losses for various power transmission system for 1 to 20 miles. Considering horsepower sent in, the loss in a 20 mile run for hydraulic (water under pressure) (at psi) is %; for electric (at volts) is %.
Equilibrium Thermodynamics gives a comprehensive but concise course in the fundamentals of classical thermodynamics. Although the subject is essentially classical in nature, illustrative material is drawn widely from modern physics and free use is.
Other phenomena supposedly specific to superfluid helium appear in the text-books. Thus P.W. Atkins's Physical Chemistry states that ‘. the entropy of the liquid is lower than the solid, and melting is an exothermic process’ of Helium The correct explanation appears to be that the latent heat of sublimation of the fine solid is less than the latent heat of boiling.
The trickle-up effect or fountain effect is an economic theory used to describe the overall ability of middle class people to drive and support the economy. The theory was founded by John Maynard Keynes ().. Full text of ""Verbal" notes and sketches for marine engineers: a manual of marine engineering practice, intended for the use of naval and mercantile engineer officers of all grades, and students, and is specially compiled for the use of engineer officers preparing for examinations of competency at home or abroad" See other formats.
One shows the canister output flow positioned to create a fountain effect to increase surface aeration. The second shows my canister next to the cabinet I want to put the canister into.
It's tall enough, but not wide enough to fit through the door opening, so I think I'll have to remove the post between doors. fountain effect may be designed to fit the pool.
The water depth should be not less than 18” for easy installation of the equipment. Nema rated electrical panels incorporate the controls for the pumps, lights and water level equipment. Panels also house operating timers, as well as timers and relays for sequencing valves.
Pool Filter. Posted 1/15/01 AM, messages. Full text of "Application of powered high lift systems to STOL aircraft design." See other formats. News 4. Ashburton Guardian. Friday, Febru New citizens welcomed. In brief Memories stolen An elderly woman has been left distressed after a.
Roles for helicases as ATP-dependent molecular switches.- The FtsK family of DNA pumps.- ATP dependent chromatin remodelers.- This book is a valuable resource as it provides an introduction to project management’s ports.
Covering the most relevant concepts relating to machine size, torque and power, the author explains the losses and. The more sensitive the compound, the better to select a larger safety margin from the upper temperature limits. Too much caution can bring about the exact opposite of the desired effect: low temperatures increase the viscosity, and thus cause higher flow losses due to friction – which heats up the compound again as it is injected into the mould.
results from a phenomenon known as the fountain effect. The upwash effect is suppressed at close proximity to the ground as the flow shifts to radial. Region 1 Region (1) is dominated by "pressure build up" inside the nozzle. When in contact with the wall, the flow is blocked by the surface obstruction.
Much of the book includes notes and numerical results resulting to a large extent from my involvement in specic projects in areas which became of particular impor-tance at the early part of the jet aircraft era.
Fountain Effect and Mode Visualization Show that the two energy losses are the same if m/M = 1 + 5/5(6). US Navy Foundry Manual - Pg - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free. As for the rest-well, our staff at Standards consisted almost entirely of third-raters: some of them were very dogged and patient men indeed, but low on courage and even lower on imagination.
They spent all their time operating mechanically by the cook-book-the routine of scientific method-and had less to show for it every year.". The variator components would have added about lbs to the MRGB.
The variator input-to-output efficiency would have ranged between 93% and 95% during variable speed operation. With a traction drive, these losses are primarily due to EHL contact spin loss.
Being a split path configuration, only half the power passes through the variator. The figures from the Oil Record Book did not correspond with the reality revealed by tanks soundings.
According the ships Navigation Log Book, on the 3rd of November at UTC the vessel was in the position reported by Italian Monitoring Satellite Image Centre in fully accordance with the pollution moment.
Ouch You have clicked a page that seems to be very popular. It’s currently a bit busy. You can have a rest and please slide to verify. Vapor-liquid phase separator permeability results. NASA Technical Reports Server (NTRS) Yuan, S. K.; Frederking, T.
Continued studies are described in the area of vapor-liquid phase separator work with emphasis on permeabilities of porous sintered plugs (stainless steel, nominal pore size 2 micrometer).
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Van Sciver, Helium Cryogenics, International Cryogenics Monograph Series, DOI /_2, # Springer Science+Business Media, LLC 17 18 2 Low-Temperature Materials Properties Heat Capacity The heat capacity is a fundamental state property of matter.
A "User-Friendly" Program for Vapor-Liquid Equilibrium. ERIC Educational Resources Information Center. Da Silva, Francisco A.; And Others. Described is a computer software package suitable for teaching and research in the area of multicomponent vapor-liquid program, which has a complete database, can accomplish phase.
18 The Art of the Helicopter the ﬂoor to put tanks close to the CM, in which case pumps will be required to feed the engines. Piston engines burn AVGAS or aviation gasoline, which is basically similar to automobile fuel but made to tighter quality standards.
This book was set in New Baskerville by Ruttle, Shaw & Wetherill, Inc., and printed and bound by Hamilton Printing Company. Recognizing the importance of presetving what has been written, it is a policy of John Wiley & Sons, Inc.
to have books of enduring value published in the United States printed on acid-free paper, and we exert our best 5/5(5).the self-accelerating fountain effect. Adding a throttling During the first minute of the event, the valve pressure valve in the lines leaving the condenser can mitigate the drop rose from psi to 7 psi, corresponding to a drop in self-accelerating process by creating additional resistance to drum surface temperature of 1°F.It has to be lower than one to account for power losses due to friction and other causes.
Efficiency of various types of hydraulic circuit is discussed in the book " A Guide to Injection Moulding of Plastics". UNDERSTANDING OF "PRESSURE", To check the understanding of "pressure", consider fig 1 and answer the following questions.