Mass flow rate efflux resulting from the transient blowdown of two-phase fluids in a pipe connected to a large vessel
Conference
·
· Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States)
OSTI ID:5482311
The transient blowdown of two-phase fluids in a pipe connected to a large vessel is determined for both single component two-phase and two component, liquid dominant, two-phase fluids. A simple behavioral model is used to characterize these fluids and provides for the analytical evaluation of certain features of the decompression process. This paper also includes for purposes of comparison the blowdown solutions for gas filled systems. Emphasis is placed upon the transient mass flow rate efflux under the conditions of choked outflow, that is, for low backpressure. The vessel is assumed to be large enough that it can be treated as a constant state source. Adiabatic flow is assumed, and solutions with and without pipe friction effects are developed. The analysis is based upon a one-dimensional treatment, and homogeneous, thermodynamic equilibrium, no-slip flow is assumed for the two-phase fluid systems. A correlation is made between the friction and frictionless cases as a function of a length-to-diameter ratio parameter of the blowdown pipe. The results are applicable to the decompression of tubes in process system heat exchangers due to sudden tube failure and to a broad class of accidental releases of hazardous materials.
- Research Organization:
- A T Research Associates Inc., Glen Ellyn, IL
- OSTI ID:
- 5482311
- Report Number(s):
- CONF-830607-
- Conference Information:
- Journal Name: Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States) Journal Volume: PVP-VOL. 75
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ADIABATIC PROCESSES
BLOWDOWN
COMPRESSION
CONTAINERS
CORRELATIONS
FAILURES
FLOW RATE
FLUID FLOW
FLUID-STRUCTURE INTERACTIONS
FRICTION
HAZARDOUS MATERIALS
HEAT EXCHANGERS
MATERIALS
ONE-DIMENSIONAL CALCULATIONS
PARAMETRIC ANALYSIS
PIPES
PRESSURE DEPENDENCE
PRESSURE VESSELS
THERMODYNAMICS
TRANSIENTS
TUBES
TWO-PHASE FLOW
420400* -- Engineering-- Heat Transfer & Fluid Flow
ADIABATIC PROCESSES
BLOWDOWN
COMPRESSION
CONTAINERS
CORRELATIONS
FAILURES
FLOW RATE
FLUID FLOW
FLUID-STRUCTURE INTERACTIONS
FRICTION
HAZARDOUS MATERIALS
HEAT EXCHANGERS
MATERIALS
ONE-DIMENSIONAL CALCULATIONS
PARAMETRIC ANALYSIS
PIPES
PRESSURE DEPENDENCE
PRESSURE VESSELS
THERMODYNAMICS
TRANSIENTS
TUBES
TWO-PHASE FLOW