An Experimental and Theoretical Â£ Investigation of Annular Steam ...

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INIS DcMtipton ANNULAR SPACE BURNOUT CRITICAL HEAT FLUX TEPOSITION DRYOUT ENTRAINMENT EXPERIMENTAL DATA FILM FLOW FILMS FLOW MODELS FLOW RATE HZ RANGE MEDIUM PRESSURE PRESSURE DROP PRESSURE GRADIENTS STEAM TABLES THICKNESS TUBES TWO-PHASE FLOW WATER WAVE PROPAGATION UDC 621.039.524.4-97 : 532.529 : 536.248.2
April 1978 Ris# Report No. 372 An Experimental and Theoretical Investigation of Annular Steam-Water Flow in Tubes and Annuli at 30 to 90 bar by Jørgen Wurtz Risø National Laboratory Department of Reactor Technology Abstract Measurements are presented of film flow rates, pressure gradients, film thicknesses, wave frequencies and velocities, and burnout heat fluxes in one annular and two tubular geometries. The more than 250 experiments were performed with steam-water at 30 to 90 bar under both adiabatic and diabatic conditions. On the basis of these data a film-flow model for the prediction of burnout is set up. General film roughness and entrainment correlations are derived from the adiabatic, equilibrium data. The capability of the model is demonstrated by several comparisons between calculations and measurements. This report is submitted to the Technical University of Denmark in partial fulfilment of the requirements fo*- obtaining the lie.tech. (Ph.D.) degree.
Page 1: i Risø Report No. 372 8. c* 5 Ris
Page 5 and 6: CONTENTS Page Introduction . 5 Annu
Page 7 and 8: - 5 - 1. INTRODUCTION Power generat
Page 9 and 10: - 7 - tated by the gas stream. Thus
Page 11 and 12: - 9 - a one-component flow (e.g. st
Page 13 and 14: Table 2.1. Fila Flow Meaaureawnta w
Page 15 and 16: - 13 - Most of these measurements a
Page 17 and 18: - 15 - Table 3.1 Propertics of Stea
Page 19 and 20: - 17 - connected in parallel and eq
Page 21 and 22: - 19 - To eliminate bubbles of stea
Page 23 and 24: - 21 - x «„4- = -ér-^ - -f- 1 (
Page 25 and 26: - 23 - The time spent on determinin
Page 27 and 28: Tabic 3.2. Summary of th« Experime
Page 29 and 30: - 27 - crement of .he difference wh
Page 31 and 32: - 29 - Q^UOO^-Q (10°C) Q fAT .) =
Page 33 and 34: - 31 - difference in hydrostatic he
Page 35 and 36: - 33 - (3.30) can be used to estima
Page 37 and 38: - 35 - interval between 50 and 70 b
Page 39 and 40: - 37 - The values of X obtained are
Page 41 and 42: - 39 - Here the dimensionless veloc
Page 43 and 44: - 41 - value exceeds the theoretica
Page 45 and 46: - 43 - tions calculated from the Ba
Page 47 and 48: - 45 - Tabl* 4.1 Constants in eq.(4
Page 49 and 50: - 47 - be demonstrated by compariso
Page 51 and 52: - 49 - 4.2.2. Entrainment and Depos
Page 53 and 54:
- 51 - kg/m s is an incorrect inter
Page 55 and 56:
- 53 - 2 diction of Q D _ for p = 9
Page 57 and 58:
- 55 - The interfacial shear stress
Page 59 and 60:
- 57 - u . = 2TT 91 i • v r ij (r
Page 61 and 62:
- 59 - ship on the entrainment rate
Page 63 and 64:
- 61 - The main reason for this ins
Page 65 and 66:
- 63 - 4,3.5. Predictions of Data A
Page 67 and 68:
- 65 - 4.4.4. Predictions of Data F
Page 69 and 70:
- 67 - the diabatic film flow is in
Page 71 and 72:
- 69 - NOMENCLATURE Main Symbols A
Page 73 and 74:
- 71 - u* V v w v t X x c f s y y D
Page 75 and 76:
- 73 - REFERENCES Andersen, P.S. (1
Page 77 and 78:
- 75 - Friedel, L. (1977). Mean voi
Page 79 and 80:
- 77 - Little, R.B. (1970). Dryout
Page 81 and 82:
- 79 - APPENDIX Tables Page Al. Fil
Page 83 and 84:
- 81 - Table A.2. Film Flow Measure
Page 85 and 86:
- • ; - . - 83 - Table A3. File F
Page 87 and 88:
- 85 - Tabla M. ril« riow nuuinatM
Page 89 and 90:
- 87 - Table A«. Ftla Flow Moaeure
Page 91 and 92:
- 89 - Takl« Alt) (ceatiaaatl. rnn
Page 93 and 94:
- 91 - Table AU. Pressure Drop Meas
Page 95 and 96:
- 93 - Takl* AI«. ktcMW HMaor« T*
Page 97 and 98:
- 95 - Tabla »IS. aaaauraaaat* of
Page 99 and 100:
Steam Burnout Locus Single-Phase St
Page 101 and 102:
From the outlet of the test j. sect
Page 103 and 104:
- 101 - / / r r •— Si »var Rod
Page 105 and 106:
- 103 - Inlot Fløng« rig. 3.S. Tu
Page 107 and 108:
- 105 - O ***** • r Saw g* the Sc
Page 109 and 110:
- 107 - no T | I I I I o G* 500 kgA
Page 111 and 112:
1 - 109 - -i 1 r i | I T ' 9 "• 1
Page 113 and 114:
- Ill - & G= 1000 kg/m*s aG=200O
Page 115 and 116:
- 113 - so no 150 q-|V»W] 200 Pig.
Page 117 and 118:
- 115 - WO no, F r T r --• i •
Page 119 and 120:
- 117 - 50 40 • 1 t i i r o A O O
Page 121 and 122:
- 119 - r T i ri J 1 1—i i i i i
Page 123 and 124:
- 121 - «£JN 0.02 x oul = 20% 6 =
Page 125 and 126:
- 123 - 400 300 v p = 30 bor o p =
Page 127 and 128:
- 125 - .• - --- - i » i m i l r
Page 129 and 130:
- 127 - 2.0 v p=30 bor/fcst Section
Page 131 and 132:
- 129 - C » T » '— \ o\ \ \ •
Page 133 and 134:
i il 20 ~ I- 6 t i« N TJ GL •D *
Page 135 and 136:
- 133 - i G-- WOO hgnrnV U- L02m i
Page 137 and 138:
Fig. 4.22. Comparison between Measu
Page 139 and 140:
- 137 100 Ol 1 i cfG= 400kg/m 2 s o
Page 141 and 142:
..39 tt> k ' ' •- — I ——i i
Page 143 and 144:
J. 4 X — XX) i 1 1 r i 1 1 1 r- I
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