STUDI EKSPERIMEN PENGARUH PANJANG THROAT TERHADAP KINERJA LIQUID JET GAS PUMP (LJGP)
Liquid gas jet pump (LJGP) is a fluid machine working principle is based on the difference in momentum. The momentum generated by the gas nozzle induces in the suction chamber. Momentum transfer between the gas and the liquid jet at a place known by the throat. In the process of mixing the throat oc...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/133977/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74906 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Liquid gas jet pump (LJGP) is a fluid machine working principle is based
on the difference in momentum. The momentum generated by the gas nozzle
induces in the suction chamber. Momentum transfer between the gas and the liquid
jet at a place known by the throat. In the process of mixing the throat occurs
between liquid and gas. This process resulted in changes in the pattern of flow and
pressure rise. Changes in flow patterns before and after mixing is jet flow to Froth
flow. Slowing the flow rate also resulted pressure rise. Fractions were carried with
the liquid gas will be compressed in the throat after the occurrence of the mixing
process. The position of the mixing process is highly dependent on the change of
the liquid flow rate and gas flow rate. At high gas flow rate, the mixing process
occurs away from the inlet throat and possibly occurs in the diffuser. These
conditions resulted in the efficiency decreases. In order that the mixing process is
always in the throat, then the necessary research that is able to find a correlation
between the effect of the discharge of liquid jet and gas discharge to a long throat.
A series of tests are carried out: varying the liquid flow rate on gas flow rate
for length variation throat consecutive 2dt, 4dt, 6dt. The test is performed on a test
section with dimensions: throat diameter (dt) = 8.5 mm, nozzle diameter = 5.7 mm
or area ratio = 0.45.
The test results showed that there was a long-throat effect on the
performance of the entire variation LJGP to discharge liquid jet and gas discharge.
LJGP overall characteristics show a similar trend for the combination of variation
and discharge of liquid jet gas discharge. The trend is: the smaller gas flow rate is
the lower pressure in suction chamber on liquid jet flow rate constant. While the
length of the throat shows the effect of changing the length throat 4dt produce the
highest efficiency compared with the length throat 2dt and 6dt for all combinations
of liquid flow rate and gas flow rate. |
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