Mario De Salve Author
Subjects of specialization
Affiliation
Helical pipes; Pressure drops; Two phase flow; Fluid dynamic instability; RELAP5/MOD3.3 code
Politecnico di Torino, Department of Energy, Italy
Mario De Salve is worked in the Politecnico di Torino, Department of Energy, Italy, Fluid Dynamics in Parallel Helical Pipes |
Research Article Open Access
Author(s): Cristina Bertani, Mario De Salve and Bruno Panella
Single phase and air-water two-phase flow in 12 mm inner diameter parallel helical pipes are investigated with three different coils diameters. Flow rate distribution, pressure drops and void fraction, along the pipes in the parallel channels are measured. The test pressure drops are compared with theoretical ones, in terms of friction factors and two phase multipliers. The instabilities arisen during the experimental tests are investigated and are related to the void fraction and flow quality. The void fraction values corresponding to the onset of oscillations are compared with a modified RELAP5/MOD3.3 code results at the same fluid dynamic conditions. Then the density wave, the flow pattern and parallel channel oscillations in some simple cases like a sing... view moreĀ»