Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL SIMULATION OF SPRAY CHARACTERISTICS IN A PRESSURE-SWIRL NOZZLE

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.023803
pages 6545-6556

Abstrakt

In this paper, the spray characteristics of a pressure-swirl atomizer is studied. Two-phase flow model VOF (Volume-of-Fluid) is applied to simulate the motion of gas-liquid inside the nozzles. The internal flow field of the swirl chamber is investigated by changing the number of the nozzle tangential inlets (1, 2, 3, and 4 respectively) under different injection pressures, while, the size of these inlets are the same. The parameters such as the liquid film velocity, the cone spray angle, and the liquid film thickness at the outlet of the nozzle are obtained under room temperature and ambient pressure. Simulation results indicate that the swirling intensity of the liquid is strongly influenced by the injection pressure but weakly by the number of tangential inlet. The performance of the pressure-swirling nozzle is evaluated by analyzing the liquid film velocity at the outlet of the nozzle. These simulation results are helpful to understand spray characteristics of pressure-swirl atomizers when jet-fuel is injected and provide guidance for gas turbine design.