Propulsor models for computational analysis of aircraft aerodynamic performance with boundary layer ingestion

David K. Hall, Michael K. Lieu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we assess the effectiveness of different propulsor computational models for use in Reynolds-Averaged Navier-Stokes (RANS) calculations of aerodynamic performance of integrated aircraft configurations with boundary layer ingesting (BLI) propulsion. The range of propulsor models considered include inlet and outlet boundary conditions to produce the desired mass flow through the propulsor, actuator disks, and momentum and energy source distribution descriptions. Two integrated propulsor configurations with aft fuselage BLI are considered: the Aurora D8 “double bubble” configuration and a conventional fuselage with tailcone thruster. The effectiveness of the models is assessed on the basis of predicted inlet stagnation pressure, velocity, and swirl distortions at the fan face and nacelle surface pressure distributions. Numerical results show the importance of the upstream interaction of the fan with the non-uniform inlet flow. Of the propulsor models considered, only the source distribution description captures this effect, and the other more commonly used descriptions yield errors in predicted inlet swirl that can significantly impact BLI propulsor efficiency. From these results, we conclude that prediction of BLI propulsor inlet conditions from integrated configuration computations requires propulsor models that accurately describe the non-uniform response of the fan to the inlet distortion.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-18
Number of pages18
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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