Simulation of Distortion Generation in a Modern Serpentine Diffuser to Improve Experimental Effectiveness (Preprint)
Abstract
Modern serpentine diffusers create distorted flowfields which are ingested by embedded propulsion systems. Fundamental research into the generation and content of such distortion patterns is necessary to better understand inlet conditions for the engine. Simulation of the diffuser provided a number of insights for a complementary experimental program including particle image velocity (PIV) plane placement and seeding locations, necessary resolution of measurement, and expected operational range and conditions. Analysis of the results provided better definition of some experimental requirements and sensitivities for capturing multiple per-rev distortions. In comparing with preliminary experimental results, it was determined that diffuser flowfield simulations may require detached-eddy simulation (DES) or large-eddy simulation (LES) to properly capture flow feature position and the impact of the separation regions.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 2012
- Accession Number
- ADA562208
Entities
People
- Darius D. Sanders
- Michael G. List
Organizations
- Air Force Research Laboratory