CFD Validation of Engine Inlet Duct Pressure Loss Model for Subsonic Non-Uniform Cross-Section Duct
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Tan, Sijian
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Abstract
The aerodynamic performance of the flow inside the duct section following the cowl lip station directly affects the efficiency of the aircraft engine inlet. There are already various studies about pressure loss in parallel rectangular and conical ducts documented. However, a general model explaining pressure recovery within a non-uniform cross-section duct still needs research and validations. The classic book by Seddon, Intake Aerodynamics, introduces a prediction model for duct pressure loss, and its experimental validations are shown for conical diffusers. However, no such experimental validations or CFD simulations can be seen for other ducts of non-uniform cross-section complex geometries. This paper will start dealing with the computation of the duct loss model for ducts of non-uniform cross-sections using the numerical integration method. Then, the developed CFD validations using ANSYS Fluent for predicted pressure recovery ratio in two geometries are presented. This paper will hopefully provide the industry with a simple but reliable calculation method, reducing the reliance on time-consuming and expensive CFD simulation.
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2024-07
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