JET PUMPSJET PUMPSintroductionintroduction

POMPY STRUMIENIOWEPOMPY STRUMIENIOWEwstępwstęp

Akademia Rolnicza w Krakowie, Katedra Inżynierii Wodnej Akademia Rolnicza w Krakowie, Katedra Inżynierii Wodnej Agricultural University of KrakowAgricultural University of Krakow, , Dept. of Water EngineeringDept. of Water Engineering

dr inż. dr inż. Leszek KsiazeLeszek Ksiazekk

Seminarium dyplomoweSeminarium dyplomowe25 Listopad 2004, Kraków25 Listopad 2004, Kraków

Plan prezentacji:

1. Wstęp

2. Przykład pompy strumieniowej (jet pump)

3. Zasada działania pompy „Venturiego”

4. Przykłady zastosowania + film (6 min.)

1. 1. What is a Jet PumpWhat is a Jet Pump ( (pompa pompa strumieniowastrumieniowa))??

A A JET PUMPJET PUMP is the same as an EJECTOR or (sometimes) an is the same as an EJECTOR or (sometimes) an INJECTOR or an EDUCTOR. It is not the same as a INJECTOR or an EDUCTOR. It is not the same as a

VENTURI PUMP or an AIRMOVER.VENTURI PUMP or an AIRMOVER.

A jet pumpA jet pump is a pump (!) is a pump (!) and is therefore, by definition, and is therefore, by definition, used to increase the pressure or the speed (or both) of a used to increase the pressure or the speed (or both) of a

FLUID. You will notice FLUID. You will notice there are no moving partsthere are no moving parts..

A fluid may be either a GAS (like air) or a LIQUID (like A fluid may be either a GAS (like air) or a LIQUID (like water) or a changeable substance (like steam).water) or a changeable substance (like steam).

In any pump ENERGY is put in and then taken out in a In any pump ENERGY is put in and then taken out in a different form.different form. For example, in a CENTRIFUGAL PUMP, or For example, in a CENTRIFUGAL PUMP, or FAN, the energy is introduced through a rotating shaft.FAN, the energy is introduced through a rotating shaft.

What is a Jet Pump?What is a Jet Pump?

In a jet pump, it goes in as In a jet pump, it goes in as a high speed jet of fluida high speed jet of fluid, called , called the PRIMARY FLOW, or the MOTIVE FLOW.the PRIMARY FLOW, or the MOTIVE FLOW.

In both it is taken out mostly as increased pressure of a In both it is taken out mostly as increased pressure of a stream of fluid passing through.stream of fluid passing through.

In a jet pump this stream is called the SECONDARY FLOW In a jet pump this stream is called the SECONDARY FLOW or the INDUCED FLOW and is said to be ENTRAINED by the or the INDUCED FLOW and is said to be ENTRAINED by the

primary flow.primary flow.

The primary flow and the secondary flow are discharged The primary flow and the secondary flow are discharged from the pump as a mixture called the COMBINED FLOW from the pump as a mixture called the COMBINED FLOW or the DELIVERED FLOW, or sometimes the TOTAL FLOW.or the DELIVERED FLOW, or sometimes the TOTAL FLOW.

2. Typowa pompa strumieniowa – typical jet 2. Typowa pompa strumieniowa – typical jet pumppump

(1)

Jet – wysokociśnieniowy strumień cieczyJet – wysokociśnieniowy strumień cieczy

Typy pomp strumieniowychTypy pomp strumieniowych

3. Zwężka Venturiego3. Zwężka Venturiego

21 EE (1)

Równanie Bernouliego dla cieczy idealnej dla przekrojów 1-1 i 2-2Równanie Bernouliego dla cieczy idealnej dla przekrojów 1-1 i 2-2

1

1

2

2

p.por.

Równanie Bernouliego dla cieczy Równanie Bernouliego dla cieczy idealnej dla przekrojów 1-1 i 2-2 idealnej dla przekrojów 1-1 i 2-2

z2 = 0 p2 = ? 2 = ?

p1 = ?z1 = 01 = ?

22

22

11

21

22zp

gzp

g

(2)

strat = 0

Po podstawieniu do równania (2)Po podstawieniu do równania (2)

002

02

2221

21

p

gp

g (3)

(4)

2

221

21

22p

gp

g

Analiza jakościowaAnaliza jakościowa

2

221

21

22p

gp

g (4)

prędkość v2 > v1 dlatego v22/2g >

v12/2g dla cieczy idealnej E2 =

E1z bilansu energi wynika p2/ < p1/

Równanie ciągłości strugi Q1=Q2; F1v1=F2v2

PrzykładPrzykład

g2

21

g2

22

1p

2p

v22/2g > v1

2/2g

p2/ < p1/

podciśnienie

zasysanie z zewnątrz(powietrza, cieczy)

4. 4. A Jet A Jet PumpPump

in in aactionction

The AUS016 is a jet pump, and so has no moving parts. It weighs only 22kg/49lb. Driven by medium pressure water, it can pump up to 20 tons/hour of solids of up to 38mm/11\2'' size. It can deliver to more than 60m height or 100m distance. Branch sizes are 80mm/3'' and 100mm/4''. It is made of stainless steel, acetal and high-chrome iron for long resistance to both wear and corrosoin.

The Seaton Pump is a lightweight (18kg/37lb) jet pump for deployment by diver, rov or other means. It will pass solids of up to 75mm/3'' at up to 40 tons/hour. It is made of acetal or hardened steel and stainless steel, and is equiped with disintergration or dilution jets. Supply water is up to 7bar/100psi.

Jet PumpJet Pump - pompa strumieniowa - pompa strumieniowa

PRIMARY FLOW, or the MOTIVE FLOWPRIMARY FLOW, or the MOTIVE FLOW (a high speed jet of fluida high speed jet of fluid) – strumień ) – strumień wymuszający ruch cieczywymuszający ruch cieczy

the SECONDARY FLOW or the INDUCED FLOW the SECONDARY FLOW or the INDUCED FLOW – przepływająca mieszanina – przepływająca mieszanina cieczy i zawiesiny, której ruch został wymuszony cieczy i zawiesiny, której ruch został wymuszony

Jet pump – pompa strumieniowaJet pump – pompa strumieniowa

Jet pump – pompa strumieniowaJet pump – pompa strumieniowa

A.W. Wakefield, 2002, An introduction to the jet pump, Stanford and GENFLOR Technology, Ed.V

www.genflo.co.uk