Benchmark Experimental Database for Multiphase Combustion Model Input and211 Validation: Characterization of the Inlet Combustion Air

摘要

The air flow through a vane-cascade swirl generator is examined both211u001eexperimentally and numerically to characterize the inlet combustion air flow 211u001eentering a reference spray combustion facility at NIST. A three-dimensional model 211u001eis used to simulate the aerodynamics in the 12-vane cascade swirl generator that 211u001eimparts the desired degree of angular momentum to the air in the annulus leading 211u001einto the reactor. A numerical simulation using the Renormalization Group method 211u001e(RNG) kappa-epsilon turbulence model results in a velocity profile consistent 211u001ewith experimental measurements, and correctly predicts a recirculation zone that 211u001eis experimentally observed at the exit of the annual passage. This work is part 211u001eof a larger project at NIST in which benchmark data is collected for input and 211u001evalidation of multiphase combustion models, and the results presented provide a 211u001ewell-characterized inlet condition for the spray combustion reactor. The good 211u001eagreement between the experimental data and the simulation with the RNG kappa-211u001eepsilon turbulence model provides further validation for this model in confined, 211u001eannular flows.