Abstract
The objective of this study was to implement and test a computational methodology designed for robust and accurate prediction of spray-bar droplet dispersion for aeropropulsion icing tests. The three-dimensional methodology combines the NPARC code and a modie ed KIVA-II code (K-ICE). A validation study was completed to test the stochastic eddy model for turbulent dispersion calculations. Parametric studies were completed on an extracted domain slice of an NPARC air e owe eld solution for an aeropropulsion test cell. The parametric studies tested the ine uence of computational, spray, vapor, and tunnel characteristics on liquid water content (LWC) spatial distribution. Results showed the strong sensitivity of LWC uniformity to turbulent kinetic energy, and initial droplet velocity and temperature. In addition, two calculations were performed on the full domain solution with two different nozzle spray arrangements. The predicted accretion patterns were similar to those found experimentally, although high-resolution simulations showed that LWC distributions at the test section can exhibit signie cant nonuniformity on small spatial scales.
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