HEAD-LOSS OF A T-JUNCTION - Forschungsbereich Wasserbau...HEAD-LOSS OF A T-JUNCTION Objectives:...
2
HEAD-LOSS OF A T-JUNCTION Objectives: Determination of the head-losses of a T-junction under various operating conditions Abstract At a projected pump-storage power plant different operation conditions are necessary due to regulation processes. Thereby inflow and outflow conditions in the T-junctions, which are located between the pumps and turbines, are changed rapidly. To quantify the hydraulic properties and head losses of the T-junction physical model tests were conducted res pu tu C1 res pu tu C2 res pu tu C3 res pu tu C4 res pu tu C5 Operating conditions Piezometric tubes Computer IDM Pressure gauges Difference pressure sensor Piezometric tubes Computer IDM Pressure gauges Difference pressure sensor Experimental set-up The head-loss coefficient of the T-junction is determined by: g 2 v j to i from friction pipe j branch in pressure total i branch in pressure total K 2 m ij − − = loss-coefficient case 5 (based on v pu) -2.00 -1.50 -1.00 -0.50 0.00 0.50 1.00 1.50 2.00 -2.00 -1.80 -1.60 -1.40 -1.20 -1.00 -0.80 -0.60 -0.40 -0.20 0.00 q=Q(res)/Q(pu) loss-coefficient K K pu-res K pu-res case 4 K tu-res K tu-res case 4 K pu-tu K pu-tu case 4 loss-coefficient case 3 (based on v pu) -2.00 -1.50 -1.00 -0.50 0.00 0.50 1.00 1.50 2.00 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 q=Q(res)/Q(pu) loss-coefficient K K pu-res case 4 K pu-res K pu-res case 2 K tu-res case 4 K tu-res K tu-res case 2 K pu-tu case 4 K pu-tu K pu-tu case 2
Transcript of HEAD-LOSS OF A T-JUNCTION - Forschungsbereich Wasserbau...HEAD-LOSS OF A T-JUNCTION Objectives:...
-
HEAD-LOSS OF A T-JUNCTION Objectives: Determination of the head-losses of a T-junction under various operating conditions
Abstract At a projected pump-storage power plant different operation conditions are necessary due to regulation processes. Thereby inflow and outflow conditions in the T-junctions, which are located between the pumps and turbines, are changed rapidly. To quantify the hydraulic properties and head losses of the T-junction physical model tests were conducted
res
pu
tu
C1
res
pu
tu
C2
res
pu
tu
C3
res
pu
tu
C4
res
pu
tu
C5
Operating conditions
Piezometrictubes
Computer
IDMPressure gauges
Difference pressuresensor
Piezometrictubes
Computer
IDMPressure gauges
Difference pressuresensor
Experimental set-up
The head-loss coefficient of the T-junction is determined by:
g2vjtoifromfrictionpipejbranchinpressuretotalibranchinpressuretotalK 2
mij
−−=
loss-coefficient case 5 (based on v pu)
-2.00
-1.50
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
-2.00 -1.80 -1.60 -1.40 -1.20 -1.00 -0.80 -0.60 -0.40 -0.20 0.00
q=Q(res)/Q(pu)
loss
-coe
ffic
ient
K
K pu-res K pu-res case 4K tu-res K tu-res case 4K pu-tu K pu-tu case 4
loss-coefficient case 3 (based on v pu)
-2.00
-1.50
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
q=Q(res)/Q(pu)
loss
-coe
ffici
ent K
K pu-res case 4 K pu-res K pu-res case 2K tu-res case 4 K tu-res K tu-res case 2K pu-tu case 4 K pu-tu K pu-tu case 2
-
Project team: B. Huber, K. Fuchs
References: 1. Miller, D.S. (1978). Internal Flow Systems, BHRA Fluid Engineering, Vol. 5
/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False
/Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure false /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles false /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /DocumentCMYK /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /UseDocumentProfile /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice
