STEALTH modeling of time-dependent flows in piping. Final report
This report documents technologies that enable the STEALTH 1D numerical code to simulate the time-dependent flow phenomena that can occur in the piping systems of power plants. Fixed-frame control volumes simulate the presence of piping components; these include models for orifices, area changes, valves, tee junctions, and turbo-machines. The hydro version of the STEALTH code, purged of the physics and numerics associated with solid mechanics, can perform efficient flow simulations. The pipe friction and piping component loss model account for irreversible effects associated with flow in piping systems. Instantaneous stream functions account for transient forces that bear on piping components. The plot overlay option can display several nodal histories on one axis system. In demonstration of these technologies, the appendixes describe one-dimensional, numerical simulations of pipe flows that are generic to power plant systems. These include simulations of a feedwater shutdown event, a pressurizer relief line discharge event, a pump trip (with bypass) event, a three-dimensional blowdown event, and the response of a water-filled, straight pipe to a pressure pulse.
- Research Organization:
- Science Applications, Inc., San Leandro, CA (USA)
- OSTI ID:
- 6654319
- Report Number(s):
- EPRI-NP-1441
- Country of Publication:
- United States
- Language:
- English
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