| Popis: |
The results of an experimental investigation of the temperature regime of a helical coil with the upflow and downflow of a steam-water mixture are presented. The experiments were carried out in the following range of operational parameters: pressure, P = 9.81−17.6 MPa; mass velocity, ρw = 500–1500 kgm−2s−1; heat fluxes, q = 100–1500 kWm−2. At x > 0.2, the critical heat fluxes in the coil are much higher than in a vertical straight tube, while the temperature regime of the coil tube in the post-dryout region is less severe. The wall temperature jump in the post-dryout region changes around the tube perimeter and depends on the flow direction. |
