In this work, the existing NASA/University of Toledo Broadband Aeroacoustic Stator Simulation (BASS) code will be applied to the direct prediction of broadband noise generated by turbulent fan wakes interacting with the outlet guide vanes (OGV) in a realistic high bypass ratio jet engine. The resulting data will be validated using data taken in the NASA/GE Source Diagnostics Test (SDT) experiments.
The BASS code is a state-of-the-art sixth-order-accurate parallel Computational Aeroacoustics (CAA) code designed for general applications. The BASS code has been previously applied to a number of realistic flow and noise predictions, with very good results. In earlier work, the BASS code has been run on 1500-2000 cores with good performance; however, the current test case requires at least an order of magnitude more cores. The proposed effort will be focused on improving the performance and scalability of the BASS code for future large-scale applications.
In 2017, the BASS code was ported to XSEDE Stampede for testing -- but it was found that the I/O routines in BASS failed on Stampede due to an unexpected interaction between the MPI-I/O routines in BASS and the filesystem on Stampede. Recently, the MPI-I/O routines have been removed from BASS and the new I/O routines would benefit greatly from being tested on multiple platforms.