This Standard provides guidance for the design and application of models by those concerned with the extension or supplementation of prototype tests of equipment using ASME Performance Test Codes. Where there are test codes in existence covering specific equipment, the guiding principles, instruments and methods of measurement from such codes shall be used with only such modifications as become necessary by virtue of the fact that a model is being tested instead of a prototype. A model is a device, machine, structure or system which can be used to predict the behavior of an actual and similar device, machine, structure or system which is called the prototype. A physical model may be smaller than, the same size as, or larger than the prototype. PTC 19.23 consists of (a) General discussion of model testing; (b) Example problems; and (c) Theoretical background.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | PERSONNEL OF PERFORMANCE TEST CODE COMMITTEE NO. 19.23 ON MODEL TESTING <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Personnel of Performance Test Codes Supervisory Committee <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | SECTION 1 0 GENERAL 0.1 Objective 0.2 Intended Use of This Document 0.3 Definition of a Model 0.4 General Philosophy <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 DIMENSIONS TABLES TABLE 1 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 2 UNITS 3 DIMENSIONLESS GROUPS 4 SIMILITUDE (SIMILARITY) TABLE 2 <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.1 4.2 5 SOME MODELING EXAMPLES USING DIMENSIONLESSNUMBERS 5.1 The Pendulum <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.2 A Vibration Dynamic Damper 5.3 Incompressible Flow Turbine Blade Cascade Study 5.4 Compressible Flow Turbine Study FIGURES FIG. 1 (a) FIG. 1 (b) <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | FIG . 2 FIG. 3 <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5.5 Flow Induced Turbulence FIG. 4 FIG. 5 <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | FIG.6 <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.6 Characteristic Length FIG. 7 FIG. 8 <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6 REFERRED QUANTITIES FIG. 9 <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | FIG. 10 CLASSIFICATION OF TURBULENT FLOW <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | SECTION 2 INDEX OF EXAMPLE PROBLEMS EXAMPLE 1- OVERSIZED TURBINE STAGE FLOW MODEL <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | TABLE 1-1 <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | EX. 1-1 MOVING BUCKETS AND OBSERVER ON GENERAL ELECTRIC 25\/1 SCALE TURBINE STAGE EX. 1-2 COMPARISON OF THEORETICAL AND MEASURED PRESSURE DISTRIBUTIONS ON ROTATING BUCKET <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | EXAMPLE 2- PUMP INTAKE VORTEX STUDIES <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | EX. 2-1 TYPICAL PUMP INSTALLATION AND INTAKE DESIGN EX. 2-2 <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | EX. 2-3 MODEL SUCTION TUNNEL <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | TABLE 2-1 PROTOTYPE AND MODEL DATA <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | EX. 2-4 SIPHON LOSS WITH BELL SUCTION EX.2-5 SIPHON LOSS WITH SCOOP SUCTION <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | EX . 2-6 COMPARISON OF LOSSES WITH SCOOP SUCTION AND BELL SUCTION <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | EXAMPLE 3 – HYDRAULIC TURBINE TESTS EX. 2-7 DRAWDOWN AND HEAD-LOSS CURVES <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | EX. 3-1 EX.3-2 <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | EXAMPLE 4- BUTTERFLY VALVE TESTS <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | EX. 4-1 <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | EX. 4-2 LOSS COEFFICIENTS OF BUTTERFLY VALVE FOR VARIOUS CLOSING ANGLES() ANO NOZZLE THRUSTS <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | EX. 4-3 TORQUE OF BUTTERFLY VAlVE FOR VARIOUS ANGLES AND PRESSURE DROPS <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | EX . 4-4 DISCHARGE COEFFICIENT FOR VARIOUS ANGLES AND PRESSURE DROPS <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | EXAMPLE 5- ELECTROSTATIC PRECIPITATOR, GAS FLOW DISTRIBUTION <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | EX. 5-1 SIDE ELEVATION OF ELECTROSTATIC PRECIPITATOR <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | EX. 5-2 GAS FLOW IMBALANCE – OUTLET FLUES AND I.D. FANS <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | EX. 5-3 SIDE ELEVATION OF I.D. FANS <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | EX. 5-4 TYPICAL MEASURED VELOCITY PROFILE, AS INSTALLED LOWER PRECIPITATOR INLET <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | EX. S-5 AVERAGE INLET VELOCITY SIDE ELEVATION PROFILES, AS INSTALLED <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | EX. 5-6 AVERAGE OUTLET VELOCITY SIDE ELEVATION PROFILES, AS INSTALLED <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | EX. 5-7 HISTOGRAM ANALYSIS OF UPPER PRECIPITATOR INLET VELOCITY MEASUREMENTS <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | EX. 5-8 HISTOGRAM ANALYSIS OF LOWER PRECIPITATOR INLET VELOCITY MEASUREMENTS <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | EX. 5-9 MODEL STUDY OF THE PRECIPITATOR INSTALLATION <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | EX. 5-10 VERTICAL GAS FLOW DISTRIBUTION LOWER PRECIPITATOR INLET EX. 5-11 VERTICAL GAS FLOW DISTRIBUTION LOWER PRECIPITATOR OUTLET <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | EXAMPLE 6- FLOW IN FURNACES AND DUCTS, SMOKE AND WATER TABLE TESTS EX. 6-1 SMOKE TABLE-ECONOMIZER TO AIR HEATER- AS DESIGNED <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | EX. 6-2 SMOKE TABLE-ECONOMIZER TO AIR HEATER – AS MODIFIED IN MODEL <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | EX. 6-3 WATER TABLE- TWO-DIMENSIONAL MODEL EX.6-4 WATER TABLE- REPEAT OF EX. 6-1 <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | EXAMPLE 7- COOLING TOWER, FLOW RECIRCULATION <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | EXAMPLE 8- LARGE COMPRESSOR FOR THE TULLAHOMA WINDTUNNEL EX. 8-1 ONE OF FOUR SECTIONS OF THE 400,000 HP TULLAHOMA WINDTUNNEL COMPRESSOR. THIS COMPRESSOR WAS DEVELOPED USING 1\/8 AND 1\/16 SCALED MODELS. <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | EX. 8-2 1\/18 SIZE LOW SPEED MODEL (100 HP) (74.6 kW) EX. 8-3 <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | EX. 8-4 1\/16 SIZE MODEL OF ONE SECTION OF THE TULLAHOMA COMPRESSOR (216,000 HP) (161 ,194 kW) <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | EX. 8-5 COMPARISON OF THE PREDICTED AND MEASURED PERFORMANCE CHARACTERISTICS OF THE COMPRESSOR <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | EXAMPLE 9- RIVER MODEL HEATING STUDIES <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | EX. 9-1 GENERAL ARRANGEMENT OF YORKTOWN ESTUARY MODEL <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | EX. 9-2 TEMPERATURE RISE ABOVE RIVER AMBIENT SURFACES\/PROFILES <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | EXAMPLE 10- MODEL TESTING OF LARGE FANS <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | SECTION 3 THEORETICAL BACKGROUND 1 DIMENSIONS <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | 2 DIMENSIONAL ANALYSIS <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | 3 REFERRED QUANTITIES AND SPECIFIC SPEED TABLE 3 REFERRED QUANTITIES <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 4 SIMILARITY AND MODEL LAWS TABLE 4 TURBOMACHINERY DIMENSIONLESS* VARIABLES <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | FIG. 11 CENTRIFUGAL AND AXIAL FLOW PUMPS FIG. 12 PUMP EFFICIENCY VERSUS SPECIFIC SPEED AND PUMP SIZE <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | 5 EXAMPLES 5.1 Efficiency of a Centrifugal Pump 5.2 Film-Type Condensation in_a Vertical Pipe <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 5.3 Dimensional Analysis of a Time Dependent Radiative Model FIG. 13 <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | 6 THE SIMILARITY LAWS OF REYNOLDS AND FROUDE <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | 7 DERIVATION OF MODEL LAWS FROM BASIC PHYSICAL LAWS <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | APPENDIX <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ASME PTC-19.23 Guidance Manual for Model Testing – Reaffirmed 1985<\/b><\/p>\n |