The pressure relaxation of liquid jets after isochoric heating

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6507519

Chen, X M; Schrock, V E ^[1]

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1. California Univ., Berkeley, CA (USA). Dept. of Nuclear Engineering

During isochoric heating by fast neutron irradiation, a high pressure is almost instantaneously built up inside the falling liquid jets in a HYLIFE (ICF) reactor. It has been suggested that the jets will breakup as a consequence of negative pressure occurring during the relaxation. This is important to both the subsequent condensation process and the chamber wall design. In this paper the mechanism of the relaxation of liquid jets after isochoric heating has been studied with both incompressible and compressible models. The transient pressure field predicted is qualitatively similar for both models and reveals a strongly peaked tension in the wake of a rarefaction wave. The pressure then rises monotonically in radius to zero pressure on the boundary. The incompressible approximation greatly over predicts the peak tension, which increases with time as the rarefaction wave moves toward the center of the jet. Since the tension distribution is as a narrow spike rather than uniform, a cylindrical fracture is the most likely mode of failure. The paper also discusses the available methods for estimating liquid tensile strength.

• Research Organization: Lawrence Livermore National Lab., CA (USA); California Univ., Berkeley, CA (USA). Dept. of Nuclear Engineering
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6507519
• Report Number(s): UCRL-CR-103909; CONF-901007-11; ON: DE91000946
• Resource Relation: Conference: 9. topical meeting on technology of fusion energy, Oak Brook, IL (USA), 7-11 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HEAT TRANSFER FLUIDS
STRESS RELAXATION
HYLIFE CONVERTER
HEAT TRANSFER
BOUNDARY CONDITIONS
DESIGN
JETS
NEUTRON ABSORBERS
NUMERICAL SOLUTION
PRESSURE EFFECTS
RADIATION HEATING
TRANSIENTS
ENERGY TRANSFER
FLUIDS
HEATING
LASER FUSION REACTORS
RELAXATION
THERMONUCLEAR REACTORS
700208* - Fusion Power Plant Technology- Inertial Confinement Technology