IN ING LAB ORATORY DIVISION - Lehigh Universitydigital.lib.lehigh.edu/Fritz/Pdf/277_12.PdfPUMP....
Transcript of IN ING LAB ORATORY DIVISION - Lehigh Universitydigital.lib.lehigh.edu/Fritz/Pdf/277_12.PdfPUMP....
PHrIiz ENG INE'ER ING LAB ORATORY
HYDHAULICS DIVISION
IvJ:Etmorandum No, M~12
F.L. Report No. 277-M~12
STATUS RE;POR~' OF RESEARCH PROJECT
ON
IMPROVING DESIGN OF A HOPPER DREDGE PUMP
Prepared by
J"ohn B. Herb ich
Prepared :for
U.S . ARMY EtfGINEER DISTRICT, PHILADELPHIA
Corps o:f Engineers
Philadelphia 29, Pennsylvania
Contract No. DA~36-109~CIVENG-59-1l2
May 1960
Bethlehem, Pennsylvania
CON TEN T S
1 0 INTRODuc'rrON .. 1
110 EXPERIMEWfAL STUDIES 0 o 1
III.. RECOMMENDA'l'IONS FOR IMPELLEt1 DESIGN CHANGES 2
IV 0 EXPERIMENTAL TEST PROGRAIVI 3
REFERENCES
APPENDIX •
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STATUS REPORT OF RESEARCH PROJECT
ON
IMPROVING DESIGN OF A HOPPER DREDGE PUMP
I. INTRODUCTION
The following report summarizes the studies
performed during the month of April 1960, at the
Hydraulics Division of Fritz Engineering Laboratory,
under terms of Contract No. DA-36-109-CIVENG-59-112.
Earlier work was described in Status Reports dated:
December 1958(1)*, February 1959(2), April 1959(3),
June 1959(4), December 1959(6), February 1960(7),
March1960(9), April 1960(lq), and a Project Report
dated September 1959(5).
II. EXPERIMENTAL STUDIES
A. General Comments
Another test is planned to obtain pump charac
teristics for silt-clay-water mixture concentrations
of about 1380 grams per liter. As the concentration
of mixture was only about 1320 grams per liter, some
additional amounts of heavily concentrated silt-clay
mixture were placed in the tank. It appears that the
mixtur~ concentration is still below the required
amount, and it will be allowed to settle to permit
the siphoning out of the clear water •
.. ..~~ Numbers in parentheses refer to References, page 4
B. Pre~sure Tests
Analysis pf pressure tests around periphery of
the volute taken during the previous months is under
way.
C. High=~:e~e~_t/rovingPi;:~~
Analysis of high-speed moying pictures taken
last year has been completed. A separate Memorandum
(Number' 1'1=11) is be ing prepared and ·will be submitted
to the Sponsor in June 1960.
III. RECOMMENDATIONS FOR IMPELLER DESIGN CHANGES
Design work on developing the vane profile
according to the logarithmic spiral and the involute
curve method is under way. The following impeller
vane designs were completed:
(1) Trial Design....!Shape of vane: involute curve
Entrance angle :: 45 degrees·
Exit angle :: 35 degrees
(2 ) 'Trial Design III
Shape of vane: logarithmic spiral
Entrance angle: 45 degrees
Exit angle: 35 degrees
(3) Trial Design rv
Shape of vane: logarithmic spiral
Entrance angle: 45 degrees
2
Exit angle: 22-1/2 degrees
Sketches of 'frial. Des1.gns I, III, ~nd rv,
are presented in th~ Appendix.
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'~Tr,1., • EXPEH T1"1E1iflfAL 'T'E:S'r PBOGRAIV1
Clf;r! {:~ yll f11. C(Ylrl'fa.E: i1 t s_ ...,._,,·.:-"'_....'u......·.... ,.~, ..."'·.~, ..·.........·..,._,............-"....,,~_.
~[1he involute curve method (:[11'1a1 Design I)
'was ol'lg:Lrw,lly snggssted, 118 it was thought to be
the nlOS t r'1:1s.dily appllcab 1e method In the ease when
the entra!'we and exit angles have different values.
HOWfiver, It 1..j·as",als~ dlscov8T'sd that a logarithmlc
spiral ma:y a 1s 0 be clravHl in such a ca.se.
l1'h8 impeller vane o.f i],lrial Deslgn III'VJas
ordered ~)n April 28, ,1960, and deli,very was expect~
ed about June 1:,: 1960. (rrhls order was cancelled
on IVfay 13, 1960, following the Spons art s request).
The sketch showing Trlal Des ign IV was
f'orwa.l~ded to the Sponsor for appr'oval' on May 6,
1960.
()
(1) Herbich, J.Bo
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REF ERE N C E S
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No. M-lLehigh University, December 1958
(2) Herb ich, J 013 0
(3) Herbich, JoB.
(4) Herb iqh, J";B.
,(5) Herbich, J".B.
(6) Herb ich, J.B.
(7) Herbich, J.B.Weiss, W.L.Waddingt on, vI.
(8) Weis~. W.L.
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No. M-2Lehigh University, February 1959
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memora~dum No. M- 3Lehigh University, April 1959
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING D~SIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No. M~4
Lehigh University, June 1959
CHARACTERISTICS OF A MODEL DREDGE PUMPFritz Engineering LaboratoryProject Report No. 31Lehigh University, September 1959
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No.M,:,,5Lehigh University, December 1959
STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No. M-6Lehigh Univer~ity, February-1960
SUGGESTED DESIGN CHANGES FOR ACENTRIFUGAL PUMP IMPELLERa~NDLING DREDGED MUD
Fritz Engineering LaboratorySpecial ReportLehigh Univers i ty, November -1959
References (c0nc1uded) 5
(9) Herbich, J.B. STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering Laboratory
Memorandum No. M-8Lehigh University, March 1960
(10) Herbich, J .•B. STATUS REPORT OF RESEARCH PROJECT ONIMPROVING DESIGN OF A HOPPER DREDGEPUMP. Fritz Engineering L~boratory
Memorandum No. M-9 'Lehigh University, April 1960
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