Jet noise is a major problem that affects Department of Defense and civilian flight operations. There are many factors that affect the noise produced by an engine. Most of the key aspects that affect noise are decided early on in the design process. However, performing the simulations or experiments required to get an estimate of the noise produced by different conceptual designs are often not feasible due to high costs associated with the methods mentioned. As such, noise is often not quantified for a particular system until well into the design process, when performing detailed simulations and experiments. To get a better understanding of the noise produced by a given configuration and set of operating conditions in the early stages of design, a low-dimensional noise prediction tool is required. A model using incompressible potential flow solutions with the addition of simple acoustic sources to account for compressibility has been established to accomplish this task. This modeling approach shows good agreement (within ± 3dB) with acoustic data acquired in an anechoic chamber and large-eddy simulation data over a wide range of operating conditions and nozzle configurations.
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