Mass flow rate efflux resulting from the transient blowdown of two-phase fluids in a pipe connected to a large vessel

Conference · Sat Jan 01 00:00:00 EST 1983 · Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States)

OSTI ID:5482311

Wiedermann, A H

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-
• Journal Information: Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States), Vol. PVP-VOL. 75; Conference: American Society of Mechanical Engineers pressure vessel and piping conference, Portland, OR, USA, 19 Jun 1983
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
PIPES
BLOWDOWN
TWO-PHASE FLOW
FLOW RATE
ADIABATIC PROCESSES
COMPRESSION
CONTAINERS
CORRELATIONS
FAILURES
FLUID-STRUCTURE INTERACTIONS
FRICTION
HAZARDOUS MATERIALS
HEAT EXCHANGERS
ONE-DIMENSIONAL CALCULATIONS
PARAMETRIC ANALYSIS
PRESSURE DEPENDENCE
PRESSURE VESSELS
THERMODYNAMICS
TRANSIENTS
TUBES
FLUID FLOW
MATERIALS
420400* - Engineering- Heat Transfer & Fluid Flow