Experimental validation of a three-dimensional through-flow model for high-speed compressor surge

This paper describes the validation of surge simulations produced using low-order code ACRoSS with experimental data from a 4. 5-stage high-speed rig, representative front stages modern high-pressure compressor (HPC). is an unsteady, 3D through-flow developed at Cranfield University to predict performance during stall events. The was derived Rig250 build 6B test campaign, carried out in 2016 by DLR Institute Propulsion Technology. To correctly represent events, ducting testbed upstream and downstream included simulation. results model are compared measurements unsteady probes for two events design speed different plenum sizes. frequency pressure profiles time closely reproduced model. Analysis measurement acoustic waves modelled indicates that period likely be influenced reflection initial wave inlet duct. Using model, can accurately both 2D. Two-dimensional, axisymmetric shown sufficient cases investigated, simulated computational cost less than one hour per event just 40 CPUs. represents over order magnitude improvement power required simulate surge, traditional URANS CFD.