Transactions A.S.M.E.

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372 TRANSACTIONS OF T H E A.S.M.E. JULY, 1941 F ig . 5 C a l i b r a t i o n o f P i e z o m e t e r P a i r (Yi-Rt) a t N o . 2 U n i t b y M e a n s o f T w o - T y p e C u r r e n t - M e t e r M e t h o d F i q . 6 C h e c k o n C o n s i s t e n c y o f P i e z o m e t e r s U s i n g T u r b i n e - R u n n e r B l a d e O p e n i n g a s a P a r a m e t e r departure of one test point was determined analytically to ±0.25 per cent for the measurements with the type I current meter, shown in Fig. 4. The mean departure of one measurement was =*=0.34 per cent. The mean departure of all measurements was ±0.06 per cent and the relative precision =*=0.04 per cent. Considering th a t these values include not only the errors of the piezometer system bu t also those of the current-m eter measurements, it is believed th a t the accuracy of the systems is fully adequate as a basis for continuous-flow measurements. As a next step it was essential to see whether or not the piezometers would maintain their calibrations over a period of years. The results for one unit and one pair of piezometers of the W inter-Kennedy system are shown in Fig. 6, using the runner-blade angle of the Kaplan units as a parameter. In this instance a somewhat wider dispersion of the test points as compared w ith th a t in Figs. 4 or 5, is to be expected as the measure of blade angle is not very accurate due to the inevitable lag in the blade-operating mechanism. The results indicate, however, th a t during the period of observation no change in calibration had taken place. Of particular interest are the test points obtained in 1934, prior to proper adjustm ent of the blade-gate relation which for some reason had become slightly incoordinated.
MOUSSON—TU R B IN E D ISCHARG E M E T E R IN G AT SAFE HARBOR H Y D R O ELEC TRIC D EV ELO PM EN T 373 T A B L E 2 D E T E R M IN A T IO N O F C O N S IS T E N C Y A N D R E L A T IV E P R E C IS IO N O F P IE Z O M E T E R P A IR ; C A L IB R A T IO N O F N O . 4 U N IT Square Turbine Root Discharge of fo r Type I P ie sc o e ter Test C urrent Meter D eflectio n Run 4 l c . f . s . ^84-82 D epartures Per 6 Cent 1 7518 1.448 5192 -20 0 .3 8 400 2 5946 1 .U 0 5216 ♦ 4 0 .08 16 3 4752 .917 5182 -30 0 .58 900 4 4768 .915 5211 - 1 0.02 1 5 3687 .708 5208 - 4 0 .08 16 6 3735 .718 5202 -10 0 .1 9 100 7 3182 .604 5268 ♦56 1.07 3136 8 3145 .605 5198 -14 0.27 196 9 3163 .608 5202 -10 0 .1 9 100 10 5245 1.006 5214 ♦ 2 0 .0 4 4 11 6594 1.268 5200 -12 0 .2 3 144 12 6571 1.262 5207 - 5 0.10 25 13 8729 1.664 5246 ♦34 0.65 1156 14 8697 1.666 5220 ♦ 8 0 .15 64 15 8415 1.613 5217 ♦ 5 0.10 25 16 8401 1.612 5212 0 0 .00 0 17 7875 1.510 5215 ♦ 3 0 .06 9 18 7444 1.424 5228 ♦16 0 .31 256 19 7426 1.427 5204 - 8 0 .15 64 20 6611 1.278 5173 -39 0 .75 1521 21 6651 1.276 5212 0 0.00 0 22 5987 1.153 5193 -19 0.36 361 23 5994 1.155 5190 -22 0.42 484 24 5887 1.127 5224 ♦12 0 .2 3 144 25 5858 1.127 5198 -14 0 .2 7 196 26 5289 1.011 5231 ♦19 0.36 361 27 5301 1.015 5223 ♦11 0 .2 1 12 1 28 4726 .906 5216 ♦ 4 0 .08 16 29 4712 .906 5201 - 1 1 0 .21 121 30 4174 .797 5237 ♦25 0 .4 8 625 31 4173 .801 521D - 2 0 .0 4 4 32 3632 .697 5211 - 1 0.02 1 33 3634 .697 5214 ♦ 2 0 .04 4 34 3115 .595 5235 ♦23 0 .44 529 35 3091 .595 5195 -17 0 .3 3 289 36 2657 .510 5210 - 2 0.04 4 37 2664 .510 5224 ♦12 0 .2 3 144 Re su ite Avg -5212 C onsistency or average d ep artu re of one measurement “ ±0.25*
Page 1 and 2: Transactions of the A.S.M.E. Turbin
Page 3 and 4: T urbine D ischarge M etering a t t
Page 5: MOUSSON— TURBINE DISCHARGE M ETER
Page 9 and 10: MOUSSON—TU R B IN E DISCHA RG E M
Page 11 and 12: MOUSSON—TU R B IN E D ISCHARG E M
Page 13 and 14: MOUSSON—TURBINE DISCHARGE METERIN
Page 15 and 16: MOUSSON—TU R B IN E DISCHARGE M E
Page 17 and 18: M O l'S i( >N—TU R B IN E DISCHA
Page 19 and 20: Speed R egulation of K aplan T urbi
Page 21 and 22: SCOVILLE—SPE ED REG U LA TION OF
Page 23 and 24: SCOVILLE—SPEED REG U LA TION OF K
Page 25 and 26: SCOVILLE—SPEED REGULATION OF KAPL
Page 27 and 28: SCOVILLE—SPEED REG U LA TION OF K
Page 29 and 30: D evelopm ent of the A utom atic A
Page 31 and 32: TER R Y —D EV ELO PM EN T OF AUTO
Page 33 and 34: TKRRY—D EV ELO PM EN T OF AUTOM A
Page 35 and 36: TER R Y —D EV ELO PM EN T OF AUTO
Page 37 and 38: TER R Y —D EV ELO PM ENT OF AUTOM
Page 39 and 40: T ER R Y —D EV ELO PM EN T OF AUT
Page 41 and 42: T ER R Y —D EV ELO PM ENT OF AUTO
Page 43 and 44: TERRY—DEVELOPMENT OF AUTOMATIC AD
Page 45 and 46: 412 TRANSACTIONS OF T H E A.S.M.E.
Page 47 and 48: 414 TRANSACTIONS OF THE A.S.M.E. JU
Page 49 and 50: 416 TRANSACTIONS OF THE A.S.M.E. JU
Page 51 and 52: T he Flow of S a tu rate d W a te r
Page 53 and 54: B EN JA M IN , M ILL E R —T H E F
Page 55 and 56: BENJAM IN, M ILLER—THE FLOW OF SA
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BENJAM IN, M ILLER —T H E FLOW OF
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BEN JA M IN , M ILLER—T H E FLOW
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BEN JA M IN , M ILLER—T H E FLOW
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432 TRANSACTIONS OF T H E A.S.M.E.
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R em arks on the A nalogy B etw een
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BOELTER, M A RTINK LLI, JONASSEN—
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BOELTER, M A R TIN ELLI, JONASSEN
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Transactions A.S.M.E.

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