AS 2360.0-1993

1 - AS 2360.0-1993 MEASUREMENT OF FLUID FLOW IN CLOSED CONDUITS - VOCABULARY AND SYMBOLS
4 - PREFACE
7 - 1 Scope
8 - 2 Symbols
10 - 3 Subscripts
10 - 4 General terms in fluid mechanics
10 - 4.1 flow-rate:
10 - 4.2 mean flow-rate:
10 - 4.3 velocity distribution:
10 - 4.4 flow profile:
10 - 4.5 swirling flow:
10 - 4.6 swirl angle,
10 - 4.7 mean axial fluid velocity,
10 - 4.8 non-dimensional [relative] velocity,
10 - 4.9 hydraulic diameter,
10 - 4.10 kinetic energy coefficient,
11 - 4.11 static pressure:
11 - 4.12 Dynamic pressure
11 - 4.13 total pressure:
11 - 4.14 stagnation pressure:
11 - 4.15 Reynolds number,
11 - 4.16 Mach number,
11 - 4.17 Strouhal number,
11 - 4.18 arithmetical mean deviation of the (roughness) profile
12 - 4.19 equivalent uniform roughness,
12 - 4.20 universal head loss coefficient,
12 - 4.21 friction velocity,
12 - 4.22 steady flow:
12 - 4.23 pulsating flow of mean constant flow-rate:
12 - 4.24 unsteady flow:
12 - 4.25 laminar flow:
12 - 4.26 turbulent flow:
12 - 4.27 fully rough turbulent flow:
12 - 4.28 transition flow:
12 - 4.29 Coanda effect:
12 - 4.30 Doppler effect:
12 - 4.31 ratio of the specific heat capacities,
12 - 4.32 isentropic exponent,
13 - 4.33 compressibility factor,
13 - 5 Uncertainties
13 - 5.1 average value,
13 - 5.2 sensitivity [influence] coefficient,
13 - 5.3 frequency distribution:
13 - 5.4 population:
13 - 5.5 sample:
13 - 5.6 true value:
13 - 5.7 number of degrees of freedom,
13 - 5.8 deviation:
13 - 5.9 experimental standard deviation,
14 - 5.10 experimental variance,
14 - 5.11 weight of measurement,
14 - 5.12 calibration:
14 - 5.13 normal distribution; Laplace-Gauss distribution
14 - 5.14 method of least squares:
14 - 5.15 regression:
14 - 5.16 (absolute) error of measurement:
14 - 5.17 outlier:
14 - 5.18 spurious errors:
14 - 5.19 random error:
14 - 5.20 systematic error:
14 - 5.21 elemental error:
15 - 5.22 standard error of estimate,
15 - 5.23 confidence limits:
15 - 5.24 confidence level:
15 - 5.25 Student’s distribution
15 - 5.26 uncertainty,
15 - 5.27 accuracy:
15 - 5.28 measurand:
16 - 6 General terms related to the devices
16 - 6.1 flowmeter:
16 - 6.2 meter tube:
16 - 6.3 primary device:
16 - 6.4 secondary device:
16 - 6.5 output signal:
16 - 6.6 calibration factor of the primary device:
16 - 6.7 maximum flow-rate:
16 - 6.8 minimum flow-rate:
16 - 6.9 flow-rate range:
16 - 6.10 transitional flow-rate:
16 - 6.11 nominal flow-rate:
17 - 6.12 full-scale flow-rate:
17 - 6.13 pressure loss
17 - 6.14 working conditions:
17 - 6.15 installation conditions:
17 - 6.16 straight length:
17 - 6.17 irregularity:
17 - 6.18 flow conditioner [straightener]:
17 - 6.19 swirl reducer:
17 - 6.20 flow stabilizer:
17 - 6.21 wall (pressure) tapping:
17 - 6.22 drain holes:
17 - 6.23 vent holes:
17 - 7 Differential pressure devices
17 - 7.1 differential pressure device:
17 - 7.2 primary device (of a differential pressure device)
17 - 7.3 orifice; throat
17 - 7.4 diameter ratio
17 - 7.5 Pressure tappings; pressure taps
18 - 7.6 piezometer ring:
18 - 7.7 carrier ring:
18 - 7.8 annular chamber:
18 - 7.9 orifice plate:
20 - 7.10 nozzle:
20 - 7.11 Venturi tube:
21 - 7.12 differential pressure,
21 - 7.13 differential pressure ratio,
21 - 7.14 pressure ratio,
21 - 7.15 acoustic ratio,
21 - 7.16 velocity of approach factor,
21 - 7.17 discharge coefficient,
21 - 7.18 flow coefficient,
21 - 7.19 expansibility [expansion] factor,
21 - 8 Critical flow measurement
21 - 8.1 critical flow:
22 - 8.2 critical flow function,
22 - 8.3 real gas critical flow coefficient,
22 - 8.4 critical pressure ratio:
22 - 8.5 sonic nozzle:
22 - 8.6 sonic [critical] Venturi nozzle:
22 - 9 Velocity-area methods
22 - 9.1 index of asymmetry,
23 - 9.2 points of mean axial fluid velocity:
23 - 9.3 peripheral flow-rate:
23 - 9.4 current-meter:
23 - 9.5 propeller-type current-meter:
23 - 9.6 self-compensating propeller:
23 - 9.7 spin test
23 - 9.8 yaw probe:
23 - 9.9 Pitot tube:
24 - 9.10 static pressure tapping:
24 - 9.11 total pressure tapping:
24 - 9.12 differential pressure
24 - 9.13 stationary array:
24 - 10 Tracer methods
24 - 10.1 dilution methods:
24 - 10.2 transit time method:
24 - 10.3 concentration of the tracer,
24 - 10.4 dilution ratio [rate],
24 - 10.5 injection cross-section [station]:
24 - 10.6 sampling cross- section [station]
24 - 10.7 measuring section:
24 - 10.8 mixing length:
24 - 10.9 time of passage of the tracer cloud:
24 - 10.10 counting rate:
24 - 11 Electromagnetic methods
24 - 11.1 electromagnetic flowmeter:
24 - 11.2 meter tube (of an electromagnetic flowmeter):
24 - 11.3 meter electrodes:
25 - 11.4 magnetic field:
25 - 11.5 electrode signal:
25 - 12 Weighing and volumetric methods
25 - 12.1 weighing method:
25 - 12.2 volumetric method:
25 - 12.3 diverter:
25 - 12.4 calibrated measuring [volumetric] tank:
25 - 12.5 buoyancy correction:
25 - 12.6 piston prover:
25 - 12.7 bell prover:
25 - 12.8 liquid displacement system:
25 - 12.9 soap-film burette:
25 - 12.10 ring balance:
29 - 13 Instability methods
29 - 13.1 fluidic flowmeter; nutating flowmeter:
29 - 13.2 vortex flowmeter:
29 - 13.3 wake oscillator:
30 - 13.4 bluff body:
30 - 14 Variable-area methods
30 - 14.1 constant-head meter:
30 - 14.2 variable-head meter:
30 - 14.3 cone-and- float meter:
32 - 14.4 orifice-and-plug meter:
32 - 14.5 cone-and-disc meter:
33 - 14.6 gate-type meter:
33 - 14.7 spring-loaded variable-head meter:
33 - 14.8 annular space:
33 - 14.9 float; sinker:
34 - 15 Ultrasonic methods
34 - 15.1 ultrasonic flowmeter:
34 - 15.2 primary device (of an ultrasonic flowmeter):
34 - 15.3 ultrasonic transducer:
34 - 15.4 clamp-on meter:
34 - 15.5 diagonal beam:
34 - 15.6 single-path diagonal-beam meter:
34 - 15.7 multi-path diagonal-beam meter:
34 - 15.8 time-of-flight ultrasonic meter; transit time meter
36 - 15.9 beam-deflection meter:
36 - 15.10 phase-shift meter:
36 - 15.11 Gaussian integration method:
36 - 15.12 leading edge:
36 - 15.13 sing around method:
36 - 15.14 acoustic matching layer:
36 - 16 Other methods
36 - 16.1 cross-correlation meter:
36 - 16.2 Doppler meter:
36 - 16.3 multichannel cross-correlation:
38 - 16.4 multiple- sensor cross- correlation:
38 - 16.5 turbine flowmeter:
38 - 17 Meters
38 - 17.1 Definitions applicable to all meters
38 - 17.2 Fluid meters
38 - 17.3 Water meters
38 - 17.4 Gas meters
38 - 17.5 inferential flowmeter:

Defines the terms and symbols used in the field of measurement of fluid flow in closed conduits. It is identical with and has been reproduced from ISO4006:1991.

This International Standard defines the terms to be used in the field of measurement of fluid flow in closed conduits, and gives the corresponding symbols.It has been found necessary to exclude terms which come under the following categories:a) terms which are self-evident;b) terms which do not apply specifically to this field, in particular those referring more specifically to flow in open channels (see ISO 772);c) terms referring to very specific methods of measurement which cannot be the subject of standardization.

First published as AS 2360-1980.
Revised and redesignated AS 2360.0-1993.